/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-4b0ab11 [2022-03-01 17:50:37,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:50:37,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:50:37,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:50:37,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 17:50:37,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 17:50:37,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 17:50:37,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 17:50:37,381 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:50:37,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:50:37,382 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:50:37,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:50:37,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:50:37,383 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:50:37,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:50:37,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:50:37,383 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:50:37,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:50:37,384 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:50:37,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:50:37,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:50:37,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:50:37,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:50:37,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:50:37,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:50:37,385 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:50:37,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:50:37,385 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:50:37,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:50:37,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:50:37,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:50:37,386 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:50:37,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:50:37,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:50:37,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:50:37,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:50:37,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:50:37,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:50:37,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:50:37,386 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:50:37,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:50:37,387 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:50:37,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:50:37,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:50:37,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:50:37,583 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:50:37,585 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:50:37,586 INFO L432 ainManager$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 [2022-03-01 17:50:37,586 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2022-03-01 17:50:37,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:50:37,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:50:37,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:50:37,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:50:37,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:50:37,631 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 01.03 05:50:37" (1/1) ... [2022-03-01 17:50:37,637 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 01.03 05:50:37" (1/1) ... [2022-03-01 17:50:37,643 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:50:37,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:50:37,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:50:37,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:50:37,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:50:37,652 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 01.03 05:50:37" (1/1) ... [2022-03-01 17:50:37,652 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 01.03 05:50:37" (1/1) ... [2022-03-01 17:50:37,655 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 01.03 05:50:37" (1/1) ... [2022-03-01 17:50:37,655 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 01.03 05:50:37" (1/1) ... [2022-03-01 17:50:37,659 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 01.03 05:50:37" (1/1) ... [2022-03-01 17:50:37,661 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 01.03 05:50:37" (1/1) ... [2022-03-01 17:50:37,662 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 01.03 05:50:37" (1/1) ... [2022-03-01 17:50:37,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:50:37,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:50:37,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:50:37,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:50:37,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:50:37" (1/1) ... [2022-03-01 17:50:37,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:50:37,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:37,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 17:50:37,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 17:50:37,722 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:50:37,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:50:37,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:50:37,722 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:50:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:50:37,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:50:37,723 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:50:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:50:37,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:50:37,723 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 17:50:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 17:50:37,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 17:50:37,724 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-01 17:50:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-01 17:50:37,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-01 17:50:37,726 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:50:37,764 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:50:37,765 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:50:37,879 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:50:37,898 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:50:37,898 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-01 17:50:37,899 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-03-01 17:50:37,899 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-03-01 17:50:37,899 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2022-03-01 17:50:37,900 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:50:37 BoogieIcfgContainer [2022-03-01 17:50:37,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:50:37,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:50:37,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:50:37,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:50:37,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:50:37" (1/2) ... [2022-03-01 17:50:37,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f7dcba and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:50:37, skipping insertion in model container [2022-03-01 17:50:37,907 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 01.03 05:50:37" (2/2) ... [2022-03-01 17:50:37,908 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2022-03-01 17:50:37,914 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:50:37,914 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:50:37,914 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:50:37,914 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:50:37,998 INFO L148 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-03-01 17:50:38,087 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:50:38,095 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:50:38,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-03-01 17:50:38,106 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2022-03-01 17:50:38,153 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) [2022-03-01 17:50:38,155 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) [2022-03-01 17:50:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:50:38,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:38,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:38,186 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:38,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1639101113, now seen corresponding path program 1 times [2022-03-01 17:50:38,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:38,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304235779] [2022-03-01 17:50:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:38,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:38,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:38,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304235779] [2022-03-01 17:50:38,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304235779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:38,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:38,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:50:38,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756164291] [2022-03-01 17:50:38,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:38,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:50:38,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:50:38,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:50:38,424 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) [2022-03-01 17:50:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:38,576 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2022-03-01 17:50:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:50:38,578 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 [2022-03-01 17:50:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:38,589 INFO L225 Difference]: With dead ends: 253 [2022-03-01 17:50:38,589 INFO L226 Difference]: Without dead ends: 247 [2022-03-01 17:50:38,590 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 [2022-03-01 17:50:38,610 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 [2022-03-01 17:50:38,611 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] [2022-03-01 17:50:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-01 17:50:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2022-03-01 17:50:38,716 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) [2022-03-01 17:50:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2022-03-01 17:50:38,719 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2022-03-01 17:50:38,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:38,720 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2022-03-01 17:50:38,720 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) [2022-03-01 17:50:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2022-03-01 17:50:38,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:50:38,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:38,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:38,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:50:38,722 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:38,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:38,723 INFO L85 PathProgramCache]: Analyzing trace with hash -852565589, now seen corresponding path program 2 times [2022-03-01 17:50:38,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:38,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612231114] [2022-03-01 17:50:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:38,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:38,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:38,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612231114] [2022-03-01 17:50:38,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612231114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:38,775 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:38,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:50:38,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762068525] [2022-03-01 17:50:38,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:38,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:50:38,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:38,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:50:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:50:38,778 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) [2022-03-01 17:50:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:38,908 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2022-03-01 17:50:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:50:38,909 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 [2022-03-01 17:50:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:38,916 INFO L225 Difference]: With dead ends: 262 [2022-03-01 17:50:38,916 INFO L226 Difference]: Without dead ends: 256 [2022-03-01 17:50:38,920 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 [2022-03-01 17:50:38,921 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 [2022-03-01 17:50:38,921 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] [2022-03-01 17:50:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-01 17:50:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2022-03-01 17:50:38,950 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) [2022-03-01 17:50:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2022-03-01 17:50:38,951 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2022-03-01 17:50:38,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:38,952 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2022-03-01 17:50:38,952 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) [2022-03-01 17:50:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2022-03-01 17:50:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:38,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:38,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:38,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 17:50:38,954 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash 105140105, now seen corresponding path program 1 times [2022-03-01 17:50:38,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:38,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582286062] [2022-03-01 17:50:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:38,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:39,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582286062] [2022-03-01 17:50:39,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582286062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:39,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474442586] [2022-03-01 17:50:39,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:39,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:39,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:39,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:39,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:50:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:39,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:50:39,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474442586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:39,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:39,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:50:39,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543673243] [2022-03-01 17:50:39,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:39,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:50:39,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:39,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:50:39,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:50:39,250 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) [2022-03-01 17:50:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:39,365 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2022-03-01 17:50:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:50:39,366 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 [2022-03-01 17:50:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:39,369 INFO L225 Difference]: With dead ends: 199 [2022-03-01 17:50:39,369 INFO L226 Difference]: Without dead ends: 199 [2022-03-01 17:50:39,369 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 [2022-03-01 17:50:39,373 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 [2022-03-01 17:50:39,374 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] [2022-03-01 17:50:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-01 17:50:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2022-03-01 17:50:39,407 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) [2022-03-01 17:50:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2022-03-01 17:50:39,409 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2022-03-01 17:50:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:39,409 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2022-03-01 17:50:39,410 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) [2022-03-01 17:50:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2022-03-01 17:50:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:39,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:39,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:39,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:39,612 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 [2022-03-01 17:50:39,612 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:39,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1032435817, now seen corresponding path program 1 times [2022-03-01 17:50:39,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:39,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652496127] [2022-03-01 17:50:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:39,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:39,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652496127] [2022-03-01 17:50:39,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652496127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:39,662 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:39,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:50:39,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131773052] [2022-03-01 17:50:39,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:39,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:50:39,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:50:39,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:50:39,663 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) [2022-03-01 17:50:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:39,770 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2022-03-01 17:50:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:50:39,771 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 [2022-03-01 17:50:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:39,773 INFO L225 Difference]: With dead ends: 246 [2022-03-01 17:50:39,773 INFO L226 Difference]: Without dead ends: 214 [2022-03-01 17:50:39,774 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 [2022-03-01 17:50:39,775 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 [2022-03-01 17:50:39,775 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] [2022-03-01 17:50:39,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-01 17:50:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2022-03-01 17:50:39,790 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) [2022-03-01 17:50:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2022-03-01 17:50:39,791 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2022-03-01 17:50:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:39,791 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2022-03-01 17:50:39,791 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) [2022-03-01 17:50:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2022-03-01 17:50:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:39,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:39,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:39,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 17:50:39,796 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:39,797 INFO L85 PathProgramCache]: Analyzing trace with hash 973094452, now seen corresponding path program 1 times [2022-03-01 17:50:39,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:39,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389031407] [2022-03-01 17:50:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:39,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:39,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389031407] [2022-03-01 17:50:39,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389031407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:39,838 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:39,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:50:39,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600989394] [2022-03-01 17:50:39,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:39,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:50:39,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:50:39,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:50:39,844 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) [2022-03-01 17:50:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:39,871 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2022-03-01 17:50:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:50:39,872 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 [2022-03-01 17:50:39,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:39,873 INFO L225 Difference]: With dead ends: 153 [2022-03-01 17:50:39,873 INFO L226 Difference]: Without dead ends: 137 [2022-03-01 17:50:39,873 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 [2022-03-01 17:50:39,874 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 [2022-03-01 17:50:39,875 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] [2022-03-01 17:50:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-01 17:50:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2022-03-01 17:50:39,881 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) [2022-03-01 17:50:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2022-03-01 17:50:39,883 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2022-03-01 17:50:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:39,884 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2022-03-01 17:50:39,884 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) [2022-03-01 17:50:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2022-03-01 17:50:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:39,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:39,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:39,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 17:50:39,886 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:39,887 INFO L85 PathProgramCache]: Analyzing trace with hash 804217187, now seen corresponding path program 2 times [2022-03-01 17:50:39,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:39,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797809883] [2022-03-01 17:50:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:39,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:39,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797809883] [2022-03-01 17:50:39,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797809883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:39,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353005765] [2022-03-01 17:50:39,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:39,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:39,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:39,923 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:39,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:50:39,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:39,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:39,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:50:39,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:40,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:40,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353005765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:40,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:40,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:50:40,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790446397] [2022-03-01 17:50:40,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:40,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:50:40,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:50:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:50:40,075 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) [2022-03-01 17:50:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:40,156 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2022-03-01 17:50:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:50:40,156 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 [2022-03-01 17:50:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:40,158 INFO L225 Difference]: With dead ends: 205 [2022-03-01 17:50:40,158 INFO L226 Difference]: Without dead ends: 205 [2022-03-01 17:50:40,158 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 [2022-03-01 17:50:40,160 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 [2022-03-01 17:50:40,160 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] [2022-03-01 17:50:40,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-01 17:50:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2022-03-01 17:50:40,166 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) [2022-03-01 17:50:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2022-03-01 17:50:40,167 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2022-03-01 17:50:40,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:40,167 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2022-03-01 17:50:40,167 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) [2022-03-01 17:50:40,168 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2022-03-01 17:50:40,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:40,168 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:40,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:40,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:40,371 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 [2022-03-01 17:50:40,371 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:40,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash 26248067, now seen corresponding path program 2 times [2022-03-01 17:50:40,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:40,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275398369] [2022-03-01 17:50:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:40,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:40,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275398369] [2022-03-01 17:50:40,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275398369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:40,414 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:40,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:50:40,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920813165] [2022-03-01 17:50:40,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:40,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:50:40,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:40,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:50:40,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:50:40,417 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) [2022-03-01 17:50:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:40,537 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2022-03-01 17:50:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:50:40,537 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 [2022-03-01 17:50:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:40,539 INFO L225 Difference]: With dead ends: 253 [2022-03-01 17:50:40,539 INFO L226 Difference]: Without dead ends: 244 [2022-03-01 17:50:40,539 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 [2022-03-01 17:50:40,540 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 [2022-03-01 17:50:40,540 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] [2022-03-01 17:50:40,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-01 17:50:40,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2022-03-01 17:50:40,546 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) [2022-03-01 17:50:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2022-03-01 17:50:40,546 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2022-03-01 17:50:40,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:40,547 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2022-03-01 17:50:40,547 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) [2022-03-01 17:50:40,547 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2022-03-01 17:50:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:40,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:40,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:40,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-01 17:50:40,548 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:40,549 INFO L85 PathProgramCache]: Analyzing trace with hash -738712767, now seen corresponding path program 3 times [2022-03-01 17:50:40,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:40,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371775840] [2022-03-01 17:50:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:40,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:40,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:40,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371775840] [2022-03-01 17:50:40,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371775840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:40,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:40,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:50:40,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890044524] [2022-03-01 17:50:40,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:40,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:50:40,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:50:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:50:40,598 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) [2022-03-01 17:50:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:40,672 INFO L93 Difference]: Finished difference Result 193 states and 523 transitions. [2022-03-01 17:50:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:50:40,674 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 [2022-03-01 17:50:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:40,675 INFO L225 Difference]: With dead ends: 193 [2022-03-01 17:50:40,675 INFO L226 Difference]: Without dead ends: 193 [2022-03-01 17:50:40,675 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 [2022-03-01 17:50:40,676 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-03-01 17:50:40,676 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] [2022-03-01 17:50:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-01 17:50:40,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2022-03-01 17:50:40,681 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) [2022-03-01 17:50:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2022-03-01 17:50:40,681 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 18 [2022-03-01 17:50:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:40,682 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2022-03-01 17:50:40,682 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) [2022-03-01 17:50:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2022-03-01 17:50:40,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:40,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:40,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:40,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-01 17:50:40,683 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:40,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1491858461, now seen corresponding path program 3 times [2022-03-01 17:50:40,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:40,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351145655] [2022-03-01 17:50:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:40,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:40,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:40,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351145655] [2022-03-01 17:50:40,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351145655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:40,716 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:40,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:50:40,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117947199] [2022-03-01 17:50:40,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:40,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:50:40,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:40,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:50:40,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:50:40,717 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) [2022-03-01 17:50:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:40,789 INFO L93 Difference]: Finished difference Result 193 states and 512 transitions. [2022-03-01 17:50:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:50:40,789 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 [2022-03-01 17:50:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:40,790 INFO L225 Difference]: With dead ends: 193 [2022-03-01 17:50:40,790 INFO L226 Difference]: Without dead ends: 190 [2022-03-01 17:50:40,791 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 [2022-03-01 17:50:40,793 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 [2022-03-01 17:50:40,793 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] [2022-03-01 17:50:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-01 17:50:40,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2022-03-01 17:50:40,797 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) [2022-03-01 17:50:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2022-03-01 17:50:40,798 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2022-03-01 17:50:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:40,799 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2022-03-01 17:50:40,799 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) [2022-03-01 17:50:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2022-03-01 17:50:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:40,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:40,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:40,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-01 17:50:40,800 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:40,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1888362025, now seen corresponding path program 4 times [2022-03-01 17:50:40,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:40,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193995236] [2022-03-01 17:50:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:40,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:40,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:40,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193995236] [2022-03-01 17:50:40,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193995236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:40,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14661406] [2022-03-01 17:50:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:40,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:40,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:40,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:40,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:50:40,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:40,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:40,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:50:40,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:40,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:41,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14661406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:41,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:41,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:50:41,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740646471] [2022-03-01 17:50:41,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:41,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:50:41,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:41,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:50:41,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:50:41,035 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) [2022-03-01 17:50:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:41,121 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2022-03-01 17:50:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:50:41,121 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 [2022-03-01 17:50:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:41,123 INFO L225 Difference]: With dead ends: 193 [2022-03-01 17:50:41,123 INFO L226 Difference]: Without dead ends: 193 [2022-03-01 17:50:41,123 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 [2022-03-01 17:50:41,123 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 [2022-03-01 17:50:41,124 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] [2022-03-01 17:50:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-01 17:50:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2022-03-01 17:50:41,128 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) [2022-03-01 17:50:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2022-03-01 17:50:41,128 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2022-03-01 17:50:41,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:41,129 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2022-03-01 17:50:41,129 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) [2022-03-01 17:50:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2022-03-01 17:50:41,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:41,130 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:41,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:41,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:41,347 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 [2022-03-01 17:50:41,348 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:41,348 INFO L85 PathProgramCache]: Analyzing trace with hash 978830285, now seen corresponding path program 4 times [2022-03-01 17:50:41,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:41,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438766592] [2022-03-01 17:50:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:41,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:41,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:41,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438766592] [2022-03-01 17:50:41,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438766592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:41,374 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:41,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:50:41,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898466859] [2022-03-01 17:50:41,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:41,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:50:41,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:41,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:50:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:50:41,376 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) [2022-03-01 17:50:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:41,470 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2022-03-01 17:50:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:50:41,470 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 [2022-03-01 17:50:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:41,472 INFO L225 Difference]: With dead ends: 197 [2022-03-01 17:50:41,472 INFO L226 Difference]: Without dead ends: 188 [2022-03-01 17:50:41,472 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 [2022-03-01 17:50:41,473 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 [2022-03-01 17:50:41,473 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] [2022-03-01 17:50:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-01 17:50:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2022-03-01 17:50:41,478 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) [2022-03-01 17:50:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2022-03-01 17:50:41,479 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2022-03-01 17:50:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:41,479 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2022-03-01 17:50:41,479 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) [2022-03-01 17:50:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2022-03-01 17:50:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:41,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:41,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:41,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-01 17:50:41,480 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:41,480 INFO L85 PathProgramCache]: Analyzing trace with hash 354089523, now seen corresponding path program 5 times [2022-03-01 17:50:41,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:41,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816168823] [2022-03-01 17:50:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:41,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:41,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:41,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816168823] [2022-03-01 17:50:41,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816168823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:41,524 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:41,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:50:41,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773799354] [2022-03-01 17:50:41,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:41,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:50:41,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:41,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:50:41,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:50:41,526 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) [2022-03-01 17:50:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:41,598 INFO L93 Difference]: Finished difference Result 190 states and 506 transitions. [2022-03-01 17:50:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:50:41,598 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 [2022-03-01 17:50:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:41,599 INFO L225 Difference]: With dead ends: 190 [2022-03-01 17:50:41,599 INFO L226 Difference]: Without dead ends: 190 [2022-03-01 17:50:41,600 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 [2022-03-01 17:50:41,601 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 [2022-03-01 17:50:41,601 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] [2022-03-01 17:50:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-01 17:50:41,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 164. [2022-03-01 17:50:41,605 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) [2022-03-01 17:50:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2022-03-01 17:50:41,606 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2022-03-01 17:50:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:41,606 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2022-03-01 17:50:41,606 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) [2022-03-01 17:50:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2022-03-01 17:50:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:41,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:41,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:41,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-01 17:50:41,609 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:41,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:41,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1710306545, now seen corresponding path program 5 times [2022-03-01 17:50:41,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:41,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754347063] [2022-03-01 17:50:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:41,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:41,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:41,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754347063] [2022-03-01 17:50:41,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754347063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:41,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:41,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:50:41,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140067327] [2022-03-01 17:50:41,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:41,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:50:41,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:41,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:50:41,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:50:41,651 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) [2022-03-01 17:50:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:41,748 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2022-03-01 17:50:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:50:41,749 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 [2022-03-01 17:50:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:41,750 INFO L225 Difference]: With dead ends: 248 [2022-03-01 17:50:41,751 INFO L226 Difference]: Without dead ends: 245 [2022-03-01 17:50:41,751 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 [2022-03-01 17:50:41,751 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 [2022-03-01 17:50:41,752 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] [2022-03-01 17:50:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-01 17:50:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 161. [2022-03-01 17:50:41,757 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) [2022-03-01 17:50:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2022-03-01 17:50:41,758 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2022-03-01 17:50:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:41,758 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2022-03-01 17:50:41,758 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) [2022-03-01 17:50:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2022-03-01 17:50:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:41,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:41,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:41,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-01 17:50:41,760 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash 759478481, now seen corresponding path program 6 times [2022-03-01 17:50:41,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:41,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478391550] [2022-03-01 17:50:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:41,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:41,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:41,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478391550] [2022-03-01 17:50:41,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478391550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:41,797 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:41,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:50:41,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351423432] [2022-03-01 17:50:41,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:41,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:50:41,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:41,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:50:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:50:41,798 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) [2022-03-01 17:50:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:41,872 INFO L93 Difference]: Finished difference Result 178 states and 466 transitions. [2022-03-01 17:50:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:50:41,872 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 [2022-03-01 17:50:41,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:41,873 INFO L225 Difference]: With dead ends: 178 [2022-03-01 17:50:41,873 INFO L226 Difference]: Without dead ends: 178 [2022-03-01 17:50:41,873 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 [2022-03-01 17:50:41,874 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-03-01 17:50:41,874 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] [2022-03-01 17:50:41,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-01 17:50:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2022-03-01 17:50:41,878 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) [2022-03-01 17:50:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 375 transitions. [2022-03-01 17:50:41,878 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 375 transitions. Word has length 18 [2022-03-01 17:50:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:41,878 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 375 transitions. [2022-03-01 17:50:41,879 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) [2022-03-01 17:50:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 375 transitions. [2022-03-01 17:50:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:50:41,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:41,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:41,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-01 17:50:41,880 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:41,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:41,881 INFO L85 PathProgramCache]: Analyzing trace with hash 631984787, now seen corresponding path program 6 times [2022-03-01 17:50:41,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:41,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219475857] [2022-03-01 17:50:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:41,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:41,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:41,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219475857] [2022-03-01 17:50:41,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219475857] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:50:41,907 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:50:41,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:50:41,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109597745] [2022-03-01 17:50:41,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:50:41,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:50:41,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:50:41,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:50:41,908 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) [2022-03-01 17:50:41,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:41,978 INFO L93 Difference]: Finished difference Result 139 states and 378 transitions. [2022-03-01 17:50:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:50:41,978 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 [2022-03-01 17:50:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:41,979 INFO L225 Difference]: With dead ends: 139 [2022-03-01 17:50:41,979 INFO L226 Difference]: Without dead ends: 135 [2022-03-01 17:50:41,981 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 [2022-03-01 17:50:41,981 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 [2022-03-01 17:50:41,981 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] [2022-03-01 17:50:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-01 17:50:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-03-01 17:50:41,984 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) [2022-03-01 17:50:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2022-03-01 17:50:41,985 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2022-03-01 17:50:41,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:41,985 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2022-03-01 17:50:41,986 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) [2022-03-01 17:50:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2022-03-01 17:50:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:50:41,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:41,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:41,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-01 17:50:41,987 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:41,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2083966421, now seen corresponding path program 1 times [2022-03-01 17:50:41,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:41,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381779434] [2022-03-01 17:50:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:41,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:42,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:42,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381779434] [2022-03-01 17:50:42,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381779434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:42,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242462063] [2022-03-01 17:50:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:42,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:42,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:42,120 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:42,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:50:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:42,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:50:42,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:42,335 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 [2022-03-01 17:50:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:42,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:42,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:42,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:50:42,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:42,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:50:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:42,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242462063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:42,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:42,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-03-01 17:50:42,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129656397] [2022-03-01 17:50:42,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:42,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:50:42,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:42,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:50:42,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:50:42,528 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) [2022-03-01 17:50:42,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:42,993 INFO L93 Difference]: Finished difference Result 374 states and 1062 transitions. [2022-03-01 17:50:42,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:50:42,993 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 [2022-03-01 17:50:42,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:42,995 INFO L225 Difference]: With dead ends: 374 [2022-03-01 17:50:42,995 INFO L226 Difference]: Without dead ends: 364 [2022-03-01 17:50:42,995 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 [2022-03-01 17:50:42,996 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 [2022-03-01 17:50:42,996 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] [2022-03-01 17:50:42,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-01 17:50:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 186. [2022-03-01 17:50:43,008 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) [2022-03-01 17:50:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2022-03-01 17:50:43,009 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2022-03-01 17:50:43,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:43,009 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2022-03-01 17:50:43,009 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) [2022-03-01 17:50:43,009 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2022-03-01 17:50:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:50:43,010 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:43,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:43,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:43,210 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 [2022-03-01 17:50:43,211 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:43,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:43,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1077905909, now seen corresponding path program 2 times [2022-03-01 17:50:43,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:43,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675818058] [2022-03-01 17:50:43,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:43,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:43,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:43,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675818058] [2022-03-01 17:50:43,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675818058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:43,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375500317] [2022-03-01 17:50:43,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:43,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:43,356 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:43,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:50:43,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:43,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:43,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:50:43,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:43,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:43,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:50:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:43,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:44,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:44,223 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-03-01 17:50:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:44,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375500317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:44,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:44,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:50:44,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529374463] [2022-03-01 17:50:44,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:44,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:50:44,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:44,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:50:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:50:44,349 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) [2022-03-01 17:50:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:46,142 INFO L93 Difference]: Finished difference Result 575 states and 1655 transitions. [2022-03-01 17:50:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:50:46,142 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 [2022-03-01 17:50:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:46,145 INFO L225 Difference]: With dead ends: 575 [2022-03-01 17:50:46,145 INFO L226 Difference]: Without dead ends: 556 [2022-03-01 17:50:46,146 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 [2022-03-01 17:50:46,147 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:46,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 89 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 953 Invalid, 0 Unknown, 963 Unchecked, 0.6s Time] [2022-03-01 17:50:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-03-01 17:50:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 210. [2022-03-01 17:50:46,155 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) [2022-03-01 17:50:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 592 transitions. [2022-03-01 17:50:46,156 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 592 transitions. Word has length 20 [2022-03-01 17:50:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:46,156 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 592 transitions. [2022-03-01 17:50:46,156 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) [2022-03-01 17:50:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 592 transitions. [2022-03-01 17:50:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:50:46,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:46,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:46,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:46,375 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 [2022-03-01 17:50:46,376 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:46,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 800910909, now seen corresponding path program 3 times [2022-03-01 17:50:46,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:46,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171350519] [2022-03-01 17:50:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:46,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:46,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:46,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171350519] [2022-03-01 17:50:46,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171350519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:46,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208432153] [2022-03-01 17:50:46,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:46,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:46,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:46,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:46,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:50:46,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:50:46,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:50:46,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:46,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:46,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:50:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:46,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:47,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:47,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:50:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:47,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208432153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:47,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:47,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:50:47,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102279717] [2022-03-01 17:50:47,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:47,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:50:47,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:47,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:50:47,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:50:47,292 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) [2022-03-01 17:50:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:49,933 INFO L93 Difference]: Finished difference Result 621 states and 1767 transitions. [2022-03-01 17:50:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 17:50:49,933 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 [2022-03-01 17:50:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:49,936 INFO L225 Difference]: With dead ends: 621 [2022-03-01 17:50:49,936 INFO L226 Difference]: Without dead ends: 591 [2022-03-01 17:50:49,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=882, Invalid=4520, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 17:50:49,938 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 [2022-03-01 17:50:49,938 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] [2022-03-01 17:50:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-01 17:50:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 227. [2022-03-01 17:50:49,946 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) [2022-03-01 17:50:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 644 transitions. [2022-03-01 17:50:49,947 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 644 transitions. Word has length 20 [2022-03-01 17:50:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:49,948 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 644 transitions. [2022-03-01 17:50:49,948 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) [2022-03-01 17:50:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 644 transitions. [2022-03-01 17:50:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:50:49,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:49,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:49,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-01 17:50:50,163 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 [2022-03-01 17:50:50,163 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash -32827531, now seen corresponding path program 4 times [2022-03-01 17:50:50,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:50,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525455161] [2022-03-01 17:50:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:50,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:50,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:50,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525455161] [2022-03-01 17:50:50,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525455161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:50,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321906741] [2022-03-01 17:50:50,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:50,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:50,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:50,280 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:50,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:50:50,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:50,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:50,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:50:50,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:50,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:50,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 17:50:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:50,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:50,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:50,656 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:50:50,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:50,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:50:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:50,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321906741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:50,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:50,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:50:50,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74179450] [2022-03-01 17:50:50,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:50,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:50:50,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:50:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:50:50,694 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) [2022-03-01 17:50:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:51,033 INFO L93 Difference]: Finished difference Result 334 states and 957 transitions. [2022-03-01 17:50:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:50:51,033 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 [2022-03-01 17:50:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:51,035 INFO L225 Difference]: With dead ends: 334 [2022-03-01 17:50:51,035 INFO L226 Difference]: Without dead ends: 323 [2022-03-01 17:50:51,036 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 [2022-03-01 17:50:51,036 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:51,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 582 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-03-01 17:50:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-03-01 17:50:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 235. [2022-03-01 17:50:51,042 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) [2022-03-01 17:50:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 669 transitions. [2022-03-01 17:50:51,044 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 669 transitions. Word has length 20 [2022-03-01 17:50:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:51,044 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 669 transitions. [2022-03-01 17:50:51,044 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) [2022-03-01 17:50:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 669 transitions. [2022-03-01 17:50:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:50:51,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:51,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:51,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:51,267 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 [2022-03-01 17:50:51,267 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash -669294385, now seen corresponding path program 5 times [2022-03-01 17:50:51,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:51,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020996253] [2022-03-01 17:50:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:51,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:51,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020996253] [2022-03-01 17:50:51,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020996253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:51,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987209529] [2022-03-01 17:50:51,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:51,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:51,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:51,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:51,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:50:51,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:51,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:51,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:50:51,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:51,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:51,542 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:50:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:51,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:51,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:50:51,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:51,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:50:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987209529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:51,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:51,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:50:51,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102831201] [2022-03-01 17:50:51,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:51,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:50:51,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:50:51,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:50:51,765 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) [2022-03-01 17:50:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:52,045 INFO L93 Difference]: Finished difference Result 335 states and 955 transitions. [2022-03-01 17:50:52,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:50:52,046 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 [2022-03-01 17:50:52,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:52,047 INFO L225 Difference]: With dead ends: 335 [2022-03-01 17:50:52,047 INFO L226 Difference]: Without dead ends: 325 [2022-03-01 17:50:52,048 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 [2022-03-01 17:50:52,048 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 [2022-03-01 17:50:52,048 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] [2022-03-01 17:50:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-03-01 17:50:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 231. [2022-03-01 17:50:52,054 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) [2022-03-01 17:50:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2022-03-01 17:50:52,055 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 20 [2022-03-01 17:50:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:52,055 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2022-03-01 17:50:52,055 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) [2022-03-01 17:50:52,055 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2022-03-01 17:50:52,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:50:52,056 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:52,056 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] [2022-03-01 17:50:52,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:52,256 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 [2022-03-01 17:50:52,257 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1927902218, now seen corresponding path program 1 times [2022-03-01 17:50:52,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:52,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033575735] [2022-03-01 17:50:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:52,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:52,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033575735] [2022-03-01 17:50:52,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033575735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:52,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788864992] [2022-03-01 17:50:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:52,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:52,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:52,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:52,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:50:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:52,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:50:52,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:52,541 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 [2022-03-01 17:50:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:52,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:52,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:52,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:50:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:52,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:50:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:52,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788864992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:52,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:52,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-03-01 17:50:52,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108948081] [2022-03-01 17:50:52,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:52,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:50:52,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:52,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:50:52,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:50:52,745 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) [2022-03-01 17:50:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:53,173 INFO L93 Difference]: Finished difference Result 475 states and 1356 transitions. [2022-03-01 17:50:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:50:53,173 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 [2022-03-01 17:50:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:53,175 INFO L225 Difference]: With dead ends: 475 [2022-03-01 17:50:53,175 INFO L226 Difference]: Without dead ends: 466 [2022-03-01 17:50:53,175 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 [2022-03-01 17:50:53,176 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 [2022-03-01 17:50:53,176 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] [2022-03-01 17:50:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-01 17:50:53,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 239. [2022-03-01 17:50:53,181 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) [2022-03-01 17:50:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 687 transitions. [2022-03-01 17:50:53,182 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 687 transitions. Word has length 20 [2022-03-01 17:50:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:53,182 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 687 transitions. [2022-03-01 17:50:53,182 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) [2022-03-01 17:50:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 687 transitions. [2022-03-01 17:50:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:50:53,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:53,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:53,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:53,400 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 [2022-03-01 17:50:53,400 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:53,400 INFO L85 PathProgramCache]: Analyzing trace with hash 475594560, now seen corresponding path program 2 times [2022-03-01 17:50:53,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:53,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918601263] [2022-03-01 17:50:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:53,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:53,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:53,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918601263] [2022-03-01 17:50:53,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918601263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:53,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339104288] [2022-03-01 17:50:53,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:53,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:53,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:53,535 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:53,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:50:53,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:53,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:53,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:50:53,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:53,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:53,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:50:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:53,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:54,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:54,277 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 20 treesize of output 21 [2022-03-01 17:50:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:54,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339104288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:54,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:54,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:50:54,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009274345] [2022-03-01 17:50:54,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:54,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:50:54,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:50:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:50:54,406 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) [2022-03-01 17:50:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:56,302 INFO L93 Difference]: Finished difference Result 655 states and 1874 transitions. [2022-03-01 17:50:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:50:56,303 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 [2022-03-01 17:50:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:56,305 INFO L225 Difference]: With dead ends: 655 [2022-03-01 17:50:56,305 INFO L226 Difference]: Without dead ends: 631 [2022-03-01 17:50:56,306 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 [2022-03-01 17:50:56,306 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 [2022-03-01 17:50:56,307 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] [2022-03-01 17:50:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-03-01 17:50:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 273. [2022-03-01 17:50:56,314 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) [2022-03-01 17:50:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 796 transitions. [2022-03-01 17:50:56,315 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 796 transitions. Word has length 20 [2022-03-01 17:50:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:56,315 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 796 transitions. [2022-03-01 17:50:56,315 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) [2022-03-01 17:50:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 796 transitions. [2022-03-01 17:50:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:50:56,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:56,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:56,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:56,531 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 [2022-03-01 17:50:56,531 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1331859903, now seen corresponding path program 1 times [2022-03-01 17:50:56,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:56,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342297281] [2022-03-01 17:50:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:56,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:56,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:56,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342297281] [2022-03-01 17:50:56,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342297281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:56,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816978270] [2022-03-01 17:50:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:56,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:56,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:56,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:56,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:50:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:56,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:50:56,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:56,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:50:56,883 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 16 treesize of output 10 [2022-03-01 17:50:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:56,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:57,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:57,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:50:57,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:57,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:50:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:57,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816978270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:57,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:57,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:50:57,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889869679] [2022-03-01 17:50:57,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:57,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:50:57,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:57,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:50:57,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:50:57,066 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) [2022-03-01 17:50:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:57,237 INFO L93 Difference]: Finished difference Result 365 states and 1051 transitions. [2022-03-01 17:50:57,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:50:57,237 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 [2022-03-01 17:50:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:57,238 INFO L225 Difference]: With dead ends: 365 [2022-03-01 17:50:57,239 INFO L226 Difference]: Without dead ends: 363 [2022-03-01 17:50:57,239 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 [2022-03-01 17:50:57,239 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 [2022-03-01 17:50:57,239 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] [2022-03-01 17:50:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-03-01 17:50:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 287. [2022-03-01 17:50:57,245 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) [2022-03-01 17:50:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 835 transitions. [2022-03-01 17:50:57,246 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 835 transitions. Word has length 20 [2022-03-01 17:50:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:57,246 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 835 transitions. [2022-03-01 17:50:57,246 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) [2022-03-01 17:50:57,247 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 835 transitions. [2022-03-01 17:50:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:50:57,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:57,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:50:57,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:57,463 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 [2022-03-01 17:50:57,463 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:50:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash -941602499, now seen corresponding path program 2 times [2022-03-01 17:50:57,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:57,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368192034] [2022-03-01 17:50:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:57,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:57,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368192034] [2022-03-01 17:50:57,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368192034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:57,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663905007] [2022-03-01 17:50:57,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:57,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:57,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:57,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:50:57,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:50:57,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:57,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:57,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:50:57,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:57,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:57,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-01 17:50:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:57,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:58,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:58,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 17:50:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:58,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663905007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:58,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:58,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:50:58,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395762065] [2022-03-01 17:50:58,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:58,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:50:58,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:58,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:50:58,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:50:58,356 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) [2022-03-01 17:51:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:00,311 INFO L93 Difference]: Finished difference Result 728 states and 2055 transitions. [2022-03-01 17:51:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 17:51:00,312 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 [2022-03-01 17:51:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:00,314 INFO L225 Difference]: With dead ends: 728 [2022-03-01 17:51:00,315 INFO L226 Difference]: Without dead ends: 714 [2022-03-01 17:51:00,316 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 [2022-03-01 17:51:00,316 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 [2022-03-01 17:51:00,316 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] [2022-03-01 17:51:00,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-01 17:51:00,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 268. [2022-03-01 17:51:00,325 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) [2022-03-01 17:51:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 783 transitions. [2022-03-01 17:51:00,325 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 783 transitions. Word has length 20 [2022-03-01 17:51:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:00,326 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 783 transitions. [2022-03-01 17:51:00,326 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) [2022-03-01 17:51:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 783 transitions. [2022-03-01 17:51:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:00,327 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:00,327 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] [2022-03-01 17:51:00,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:00,549 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 [2022-03-01 17:51:00,549 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:00,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1411001128, now seen corresponding path program 3 times [2022-03-01 17:51:00,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:00,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661079721] [2022-03-01 17:51:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:00,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:00,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:00,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661079721] [2022-03-01 17:51:00,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661079721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:00,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053377434] [2022-03-01 17:51:00,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:00,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:00,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:00,642 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:00,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:51:00,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:51:00,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:00,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:00,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:00,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:00,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:00,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:01,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:01,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 17:51:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:01,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053377434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:01,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:01,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:51:01,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655351988] [2022-03-01 17:51:01,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:01,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:51:01,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:01,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:51:01,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:51:01,315 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) [2022-03-01 17:51:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:03,750 INFO L93 Difference]: Finished difference Result 663 states and 1899 transitions. [2022-03-01 17:51:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 17:51:03,755 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 [2022-03-01 17:51:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:03,758 INFO L225 Difference]: With dead ends: 663 [2022-03-01 17:51:03,758 INFO L226 Difference]: Without dead ends: 636 [2022-03-01 17:51:03,760 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 [2022-03-01 17:51:03,760 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 [2022-03-01 17:51:03,761 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] [2022-03-01 17:51:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-01 17:51:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 279. [2022-03-01 17:51:03,773 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) [2022-03-01 17:51:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 819 transitions. [2022-03-01 17:51:03,774 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 819 transitions. Word has length 20 [2022-03-01 17:51:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:03,774 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 819 transitions. [2022-03-01 17:51:03,775 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) [2022-03-01 17:51:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 819 transitions. [2022-03-01 17:51:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:03,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:03,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:03,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:03,991 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 [2022-03-01 17:51:03,991 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:03,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:03,992 INFO L85 PathProgramCache]: Analyzing trace with hash -342712452, now seen corresponding path program 4 times [2022-03-01 17:51:03,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:03,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443191757] [2022-03-01 17:51:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:03,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:04,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:04,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443191757] [2022-03-01 17:51:04,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443191757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:04,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221401856] [2022-03-01 17:51:04,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:04,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:04,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:04,091 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:04,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:51:04,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:04,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:04,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:04,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:04,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:04,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 17:51:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:04,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:04,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:04,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:51:04,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:04,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:04,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221401856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:04,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:04,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:51:04,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880490744] [2022-03-01 17:51:04,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:04,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:51:04,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:04,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:51:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:51:04,444 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) [2022-03-01 17:51:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:04,730 INFO L93 Difference]: Finished difference Result 383 states and 1131 transitions. [2022-03-01 17:51:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:51:04,730 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 [2022-03-01 17:51:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:04,731 INFO L225 Difference]: With dead ends: 383 [2022-03-01 17:51:04,731 INFO L226 Difference]: Without dead ends: 372 [2022-03-01 17:51:04,732 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 [2022-03-01 17:51:04,732 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 [2022-03-01 17:51:04,732 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] [2022-03-01 17:51:04,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-03-01 17:51:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 281. [2022-03-01 17:51:04,737 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) [2022-03-01 17:51:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 826 transitions. [2022-03-01 17:51:04,738 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 826 transitions. Word has length 20 [2022-03-01 17:51:04,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:04,738 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 826 transitions. [2022-03-01 17:51:04,738 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) [2022-03-01 17:51:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 826 transitions. [2022-03-01 17:51:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:04,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:04,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:04,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-01 17:51:04,939 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 [2022-03-01 17:51:04,939 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:04,940 INFO L85 PathProgramCache]: Analyzing trace with hash -285788795, now seen corresponding path program 6 times [2022-03-01 17:51:04,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:04,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989947800] [2022-03-01 17:51:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:04,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:05,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:05,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989947800] [2022-03-01 17:51:05,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989947800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:05,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365279172] [2022-03-01 17:51:05,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:05,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:05,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:05,050 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:05,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:51:05,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:51:05,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:05,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:05,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:05,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:05,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:05,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:05,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:05,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:51:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:05,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365279172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:05,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:05,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:51:05,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123837956] [2022-03-01 17:51:05,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:05,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:51:05,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:05,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:51:05,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:51:05,843 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) [2022-03-01 17:51:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:07,517 INFO L93 Difference]: Finished difference Result 646 states and 1825 transitions. [2022-03-01 17:51:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:51:07,517 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 [2022-03-01 17:51:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:07,520 INFO L225 Difference]: With dead ends: 646 [2022-03-01 17:51:07,521 INFO L226 Difference]: Without dead ends: 607 [2022-03-01 17:51:07,522 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 [2022-03-01 17:51:07,522 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 [2022-03-01 17:51:07,522 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] [2022-03-01 17:51:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-03-01 17:51:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 308. [2022-03-01 17:51:07,530 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) [2022-03-01 17:51:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2022-03-01 17:51:07,531 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2022-03-01 17:51:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:07,531 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2022-03-01 17:51:07,531 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) [2022-03-01 17:51:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2022-03-01 17:51:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:07,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:07,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:07,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:07,750 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 [2022-03-01 17:51:07,751 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:07,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2093243258, now seen corresponding path program 1 times [2022-03-01 17:51:07,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:07,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797640440] [2022-03-01 17:51:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:07,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:07,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:07,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797640440] [2022-03-01 17:51:07,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797640440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:07,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519462224] [2022-03-01 17:51:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:07,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:07,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:07,870 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:07,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:51:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:07,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:07,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:08,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:08,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:51:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:08,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:08,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:08,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:08,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:08,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:08,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519462224] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:08,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:08,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:51:08,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559710524] [2022-03-01 17:51:08,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:08,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:08,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:08,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:08,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:08,217 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) [2022-03-01 17:51:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:08,408 INFO L93 Difference]: Finished difference Result 396 states and 1143 transitions. [2022-03-01 17:51:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:51:08,408 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 [2022-03-01 17:51:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:08,410 INFO L225 Difference]: With dead ends: 396 [2022-03-01 17:51:08,410 INFO L226 Difference]: Without dead ends: 391 [2022-03-01 17:51:08,410 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 [2022-03-01 17:51:08,410 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 [2022-03-01 17:51:08,410 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] [2022-03-01 17:51:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-03-01 17:51:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 312. [2022-03-01 17:51:08,416 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) [2022-03-01 17:51:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2022-03-01 17:51:08,417 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 20 [2022-03-01 17:51:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:08,417 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2022-03-01 17:51:08,417 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) [2022-03-01 17:51:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2022-03-01 17:51:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:08,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:08,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:08,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:08,640 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 [2022-03-01 17:51:08,640 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:08,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1848967994, now seen corresponding path program 1 times [2022-03-01 17:51:08,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:08,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258749070] [2022-03-01 17:51:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:08,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:08,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:08,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258749070] [2022-03-01 17:51:08,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258749070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:08,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79654122] [2022-03-01 17:51:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:08,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:08,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:08,737 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:08,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:51:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:08,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:08,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:08,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:08,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:09,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:09,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:09,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:09,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:09,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79654122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:09,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:09,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:09,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986745237] [2022-03-01 17:51:09,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:09,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:09,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:09,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:09,104 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) [2022-03-01 17:51:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:09,426 INFO L93 Difference]: Finished difference Result 426 states and 1230 transitions. [2022-03-01 17:51:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:51:09,426 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 [2022-03-01 17:51:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:09,428 INFO L225 Difference]: With dead ends: 426 [2022-03-01 17:51:09,428 INFO L226 Difference]: Without dead ends: 420 [2022-03-01 17:51:09,428 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 [2022-03-01 17:51:09,429 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 [2022-03-01 17:51:09,429 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] [2022-03-01 17:51:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-03-01 17:51:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 302. [2022-03-01 17:51:09,434 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) [2022-03-01 17:51:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 891 transitions. [2022-03-01 17:51:09,435 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 891 transitions. Word has length 20 [2022-03-01 17:51:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:09,435 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 891 transitions. [2022-03-01 17:51:09,435 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) [2022-03-01 17:51:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 891 transitions. [2022-03-01 17:51:09,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:09,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:09,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:09,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:09,650 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 [2022-03-01 17:51:09,650 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:09,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1707463971, now seen corresponding path program 7 times [2022-03-01 17:51:09,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:09,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851854746] [2022-03-01 17:51:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:09,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:09,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:09,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851854746] [2022-03-01 17:51:09,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851854746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:09,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476633596] [2022-03-01 17:51:09,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:09,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:09,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:09,736 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:09,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:51:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:09,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:09,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:09,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:09,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:09,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:09,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:09,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:10,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:10,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:10,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476633596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:10,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:10,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:10,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550359452] [2022-03-01 17:51:10,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:10,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:10,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:10,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:10,041 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) [2022-03-01 17:51:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:10,179 INFO L93 Difference]: Finished difference Result 375 states and 1093 transitions. [2022-03-01 17:51:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:51:10,180 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 [2022-03-01 17:51:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:10,181 INFO L225 Difference]: With dead ends: 375 [2022-03-01 17:51:10,181 INFO L226 Difference]: Without dead ends: 371 [2022-03-01 17:51:10,181 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 [2022-03-01 17:51:10,181 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 [2022-03-01 17:51:10,182 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] [2022-03-01 17:51:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-01 17:51:10,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 326. [2022-03-01 17:51:10,187 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) [2022-03-01 17:51:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 966 transitions. [2022-03-01 17:51:10,188 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 966 transitions. Word has length 20 [2022-03-01 17:51:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:10,188 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 966 transitions. [2022-03-01 17:51:10,188 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) [2022-03-01 17:51:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 966 transitions. [2022-03-01 17:51:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:10,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:10,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:10,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:10,403 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 [2022-03-01 17:51:10,403 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:10,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:10,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1699999644, now seen corresponding path program 2 times [2022-03-01 17:51:10,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:10,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742495536] [2022-03-01 17:51:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:10,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:10,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:10,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742495536] [2022-03-01 17:51:10,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742495536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:10,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965402947] [2022-03-01 17:51:10,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:10,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:10,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:10,486 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:10,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:51:10,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:10,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:10,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:10,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:10,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:10,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:10,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:10,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:10,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:11,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965402947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:11,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:11,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:51:11,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502027161] [2022-03-01 17:51:11,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:11,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:51:11,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:11,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:51:11,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:51:11,088 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) [2022-03-01 17:51:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:14,489 INFO L93 Difference]: Finished difference Result 849 states and 2328 transitions. [2022-03-01 17:51:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 17:51:14,490 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 [2022-03-01 17:51:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:14,493 INFO L225 Difference]: With dead ends: 849 [2022-03-01 17:51:14,493 INFO L226 Difference]: Without dead ends: 807 [2022-03-01 17:51:14,494 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 [2022-03-01 17:51:14,494 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 [2022-03-01 17:51:14,494 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] [2022-03-01 17:51:14,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-03-01 17:51:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 322. [2022-03-01 17:51:14,502 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) [2022-03-01 17:51:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 959 transitions. [2022-03-01 17:51:14,503 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 959 transitions. Word has length 20 [2022-03-01 17:51:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:14,503 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 959 transitions. [2022-03-01 17:51:14,503 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) [2022-03-01 17:51:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 959 transitions. [2022-03-01 17:51:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:14,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:14,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:14,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:14,719 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 [2022-03-01 17:51:14,719 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash -905666415, now seen corresponding path program 8 times [2022-03-01 17:51:14,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:14,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589798090] [2022-03-01 17:51:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:14,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:14,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589798090] [2022-03-01 17:51:14,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589798090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:14,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879958400] [2022-03-01 17:51:14,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:14,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:14,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:14,804 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:14,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:51:14,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:14,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:14,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:14,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:14,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:15,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:15,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:15,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:51:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:15,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879958400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:15,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:15,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:51:15,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912428970] [2022-03-01 17:51:15,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:15,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:51:15,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:51:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:51:15,416 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) [2022-03-01 17:51:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:18,370 INFO L93 Difference]: Finished difference Result 762 states and 2119 transitions. [2022-03-01 17:51:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 17:51:18,371 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 [2022-03-01 17:51:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:18,373 INFO L225 Difference]: With dead ends: 762 [2022-03-01 17:51:18,373 INFO L226 Difference]: Without dead ends: 730 [2022-03-01 17:51:18,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1205, Invalid=4197, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 17:51:18,375 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 [2022-03-01 17:51:18,375 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] [2022-03-01 17:51:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-01 17:51:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 321. [2022-03-01 17:51:18,382 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) [2022-03-01 17:51:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 960 transitions. [2022-03-01 17:51:18,383 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 960 transitions. Word has length 20 [2022-03-01 17:51:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:18,383 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 960 transitions. [2022-03-01 17:51:18,383 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) [2022-03-01 17:51:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 960 transitions. [2022-03-01 17:51:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:18,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:18,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:18,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:18,606 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 [2022-03-01 17:51:18,606 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:18,606 INFO L85 PathProgramCache]: Analyzing trace with hash -149178578, now seen corresponding path program 5 times [2022-03-01 17:51:18,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:18,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678360696] [2022-03-01 17:51:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:18,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:18,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:18,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678360696] [2022-03-01 17:51:18,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678360696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:18,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705908864] [2022-03-01 17:51:18,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:18,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:18,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:18,711 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:18,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:51:18,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:18,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:18,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:18,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:18,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:18,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:51:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:18,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:19,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:19,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:19,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:19,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:19,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705908864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:19,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:19,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:51:19,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746063870] [2022-03-01 17:51:19,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:19,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:19,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:19,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:19,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:19,102 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) [2022-03-01 17:51:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:19,289 INFO L93 Difference]: Finished difference Result 406 states and 1198 transitions. [2022-03-01 17:51:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:51:19,289 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 [2022-03-01 17:51:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:19,291 INFO L225 Difference]: With dead ends: 406 [2022-03-01 17:51:19,291 INFO L226 Difference]: Without dead ends: 400 [2022-03-01 17:51:19,291 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 [2022-03-01 17:51:19,292 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 [2022-03-01 17:51:19,292 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] [2022-03-01 17:51:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-01 17:51:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 330. [2022-03-01 17:51:19,298 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) [2022-03-01 17:51:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 990 transitions. [2022-03-01 17:51:19,299 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 990 transitions. Word has length 20 [2022-03-01 17:51:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:19,299 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 990 transitions. [2022-03-01 17:51:19,299 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) [2022-03-01 17:51:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 990 transitions. [2022-03-01 17:51:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:19,300 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:19,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:19,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:19,521 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 [2022-03-01 17:51:19,521 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:19,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:19,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1178685170, now seen corresponding path program 6 times [2022-03-01 17:51:19,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:19,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719367239] [2022-03-01 17:51:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:19,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:19,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:19,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719367239] [2022-03-01 17:51:19,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719367239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:19,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745629658] [2022-03-01 17:51:19,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:19,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:19,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:19,603 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:19,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:51:19,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:51:19,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:19,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:19,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:19,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:19,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:19,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:20,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:20,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:51:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:20,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745629658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:20,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:20,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:51:20,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250472866] [2022-03-01 17:51:20,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:20,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:51:20,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:20,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:51:20,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:51:20,265 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) [2022-03-01 17:51:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:23,593 INFO L93 Difference]: Finished difference Result 799 states and 2191 transitions. [2022-03-01 17:51:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-01 17:51:23,593 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 [2022-03-01 17:51:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:23,596 INFO L225 Difference]: With dead ends: 799 [2022-03-01 17:51:23,596 INFO L226 Difference]: Without dead ends: 770 [2022-03-01 17:51:23,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1387, Invalid=5255, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 17:51:23,597 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 [2022-03-01 17:51:23,597 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] [2022-03-01 17:51:23,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-01 17:51:23,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 339. [2022-03-01 17:51:23,605 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) [2022-03-01 17:51:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1020 transitions. [2022-03-01 17:51:23,606 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1020 transitions. Word has length 20 [2022-03-01 17:51:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:23,606 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1020 transitions. [2022-03-01 17:51:23,606 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) [2022-03-01 17:51:23,606 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1020 transitions. [2022-03-01 17:51:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:23,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:23,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:23,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-01 17:51:23,815 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 [2022-03-01 17:51:23,815 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:23,815 INFO L85 PathProgramCache]: Analyzing trace with hash -967485590, now seen corresponding path program 7 times [2022-03-01 17:51:23,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:23,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619511399] [2022-03-01 17:51:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:23,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:23,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:23,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619511399] [2022-03-01 17:51:23,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619511399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:23,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700657957] [2022-03-01 17:51:23,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:23,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:23,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:23,903 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:23,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:51:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:23,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:23,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:24,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:24,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:24,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:24,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:24,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:24,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:24,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:24,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700657957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:24,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:24,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:24,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390963448] [2022-03-01 17:51:24,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:24,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:24,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:24,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:24,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:24,225 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) [2022-03-01 17:51:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:24,400 INFO L93 Difference]: Finished difference Result 409 states and 1221 transitions. [2022-03-01 17:51:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:51:24,400 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 [2022-03-01 17:51:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:24,401 INFO L225 Difference]: With dead ends: 409 [2022-03-01 17:51:24,401 INFO L226 Difference]: Without dead ends: 398 [2022-03-01 17:51:24,402 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 [2022-03-01 17:51:24,402 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 [2022-03-01 17:51:24,402 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] [2022-03-01 17:51:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-01 17:51:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 335. [2022-03-01 17:51:24,407 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) [2022-03-01 17:51:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1008 transitions. [2022-03-01 17:51:24,408 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1008 transitions. Word has length 20 [2022-03-01 17:51:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:24,409 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1008 transitions. [2022-03-01 17:51:24,409 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) [2022-03-01 17:51:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1008 transitions. [2022-03-01 17:51:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:24,409 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:24,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:24,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:24,611 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 [2022-03-01 17:51:24,611 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash -20095859, now seen corresponding path program 1 times [2022-03-01 17:51:24,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:24,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581981078] [2022-03-01 17:51:24,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:24,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:24,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:24,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581981078] [2022-03-01 17:51:24,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581981078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:24,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294591888] [2022-03-01 17:51:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:24,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:24,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:24,727 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:24,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:51:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:24,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:24,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:24,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:24,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:51:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:24,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:25,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:25,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:25,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:25,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:25,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294591888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:25,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:25,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-01 17:51:25,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324962978] [2022-03-01 17:51:25,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:25,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:25,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:25,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:25,064 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) [2022-03-01 17:51:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:25,322 INFO L93 Difference]: Finished difference Result 435 states and 1270 transitions. [2022-03-01 17:51:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:51:25,322 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 [2022-03-01 17:51:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:25,324 INFO L225 Difference]: With dead ends: 435 [2022-03-01 17:51:25,324 INFO L226 Difference]: Without dead ends: 429 [2022-03-01 17:51:25,324 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 [2022-03-01 17:51:25,325 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 [2022-03-01 17:51:25,325 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] [2022-03-01 17:51:25,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-03-01 17:51:25,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 334. [2022-03-01 17:51:25,331 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) [2022-03-01 17:51:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1006 transitions. [2022-03-01 17:51:25,332 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1006 transitions. Word has length 20 [2022-03-01 17:51:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:25,332 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1006 transitions. [2022-03-01 17:51:25,332 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) [2022-03-01 17:51:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1006 transitions. [2022-03-01 17:51:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:25,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:25,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:25,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-01 17:51:25,547 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 [2022-03-01 17:51:25,547 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:25,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:25,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1330179178, now seen corresponding path program 8 times [2022-03-01 17:51:25,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:25,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668565997] [2022-03-01 17:51:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:25,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:25,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:25,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668565997] [2022-03-01 17:51:25,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668565997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:25,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414873380] [2022-03-01 17:51:25,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:25,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:25,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:25,651 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:25,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:51:25,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:25,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:25,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:25,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:25,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:25,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-01 17:51:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:25,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:26,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:26,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 17:51:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:26,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414873380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:26,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:26,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:51:26,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524858664] [2022-03-01 17:51:26,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:26,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:51:26,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:51:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:51:26,271 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) [2022-03-01 17:51:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:27,877 INFO L93 Difference]: Finished difference Result 660 states and 1862 transitions. [2022-03-01 17:51:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:51:27,878 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 [2022-03-01 17:51:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:27,880 INFO L225 Difference]: With dead ends: 660 [2022-03-01 17:51:27,880 INFO L226 Difference]: Without dead ends: 633 [2022-03-01 17:51:27,881 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 [2022-03-01 17:51:27,881 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 [2022-03-01 17:51:27,881 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] [2022-03-01 17:51:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-03-01 17:51:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 327. [2022-03-01 17:51:27,886 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) [2022-03-01 17:51:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 981 transitions. [2022-03-01 17:51:27,887 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 981 transitions. Word has length 20 [2022-03-01 17:51:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:27,887 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 981 transitions. [2022-03-01 17:51:27,887 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) [2022-03-01 17:51:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 981 transitions. [2022-03-01 17:51:27,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:27,888 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:27,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:27,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:28,088 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 [2022-03-01 17:51:28,089 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:28,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:28,089 INFO L85 PathProgramCache]: Analyzing trace with hash -353300289, now seen corresponding path program 9 times [2022-03-01 17:51:28,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:28,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130826737] [2022-03-01 17:51:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:28,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:28,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:28,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130826737] [2022-03-01 17:51:28,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130826737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:28,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101234271] [2022-03-01 17:51:28,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:28,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:28,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:28,174 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:28,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:51:28,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:51:28,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:28,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:28,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:28,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:28,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:28,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:28,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:28,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:28,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101234271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:28,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:28,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:51:28,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647052011] [2022-03-01 17:51:28,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:28,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:51:28,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:28,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:51:28,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:51:28,626 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) [2022-03-01 17:51:29,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:29,043 INFO L93 Difference]: Finished difference Result 450 states and 1332 transitions. [2022-03-01 17:51:29,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:51:29,043 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 [2022-03-01 17:51:29,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:29,045 INFO L225 Difference]: With dead ends: 450 [2022-03-01 17:51:29,045 INFO L226 Difference]: Without dead ends: 440 [2022-03-01 17:51:29,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:51:29,045 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:29,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 47 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 649 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2022-03-01 17:51:29,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-03-01 17:51:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2022-03-01 17:51:29,051 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) [2022-03-01 17:51:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1017 transitions. [2022-03-01 17:51:29,052 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1017 transitions. Word has length 20 [2022-03-01 17:51:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:29,052 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1017 transitions. [2022-03-01 17:51:29,052 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) [2022-03-01 17:51:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1017 transitions. [2022-03-01 17:51:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:29,053 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:29,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:29,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-01 17:51:29,271 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 [2022-03-01 17:51:29,271 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash 214268651, now seen corresponding path program 10 times [2022-03-01 17:51:29,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:29,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604452705] [2022-03-01 17:51:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:29,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:29,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604452705] [2022-03-01 17:51:29,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604452705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:29,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918042087] [2022-03-01 17:51:29,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:29,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:29,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:29,354 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:29,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:51:29,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:29,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:29,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:29,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:29,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:29,461 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:51:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:29,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:29,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:29,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:29,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:29,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918042087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:29,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:29,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:29,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488715832] [2022-03-01 17:51:29,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:29,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:29,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:29,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:29,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:29,646 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) [2022-03-01 17:51:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:29,834 INFO L93 Difference]: Finished difference Result 422 states and 1257 transitions. [2022-03-01 17:51:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:51:29,834 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 [2022-03-01 17:51:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:29,836 INFO L225 Difference]: With dead ends: 422 [2022-03-01 17:51:29,836 INFO L226 Difference]: Without dead ends: 411 [2022-03-01 17:51:29,836 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 [2022-03-01 17:51:29,836 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:29,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 25 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:51:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-03-01 17:51:29,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 336. [2022-03-01 17:51:29,841 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) [2022-03-01 17:51:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1008 transitions. [2022-03-01 17:51:29,842 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1008 transitions. Word has length 20 [2022-03-01 17:51:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:29,842 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1008 transitions. [2022-03-01 17:51:29,843 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) [2022-03-01 17:51:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1008 transitions. [2022-03-01 17:51:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:29,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:29,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:29,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-01 17:51:30,056 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 [2022-03-01 17:51:30,057 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:30,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1590769142, now seen corresponding path program 9 times [2022-03-01 17:51:30,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:30,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264793122] [2022-03-01 17:51:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:30,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:30,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:30,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264793122] [2022-03-01 17:51:30,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264793122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:30,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971566962] [2022-03-01 17:51:30,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:30,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:30,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:30,135 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:30,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:51:30,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:51:30,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:30,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:30,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:30,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:30,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:30,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:30,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:30,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:30,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971566962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:30,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:30,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:51:30,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459573125] [2022-03-01 17:51:30,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:30,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:51:30,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:51:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:51:30,596 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) [2022-03-01 17:51:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:31,033 INFO L93 Difference]: Finished difference Result 436 states and 1291 transitions. [2022-03-01 17:51:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:51:31,034 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 [2022-03-01 17:51:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:31,035 INFO L225 Difference]: With dead ends: 436 [2022-03-01 17:51:31,035 INFO L226 Difference]: Without dead ends: 427 [2022-03-01 17:51:31,036 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 [2022-03-01 17:51:31,036 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 [2022-03-01 17:51:31,036 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] [2022-03-01 17:51:31,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-03-01 17:51:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 339. [2022-03-01 17:51:31,041 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) [2022-03-01 17:51:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1018 transitions. [2022-03-01 17:51:31,042 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1018 transitions. Word has length 20 [2022-03-01 17:51:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:31,042 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1018 transitions. [2022-03-01 17:51:31,042 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) [2022-03-01 17:51:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1018 transitions. [2022-03-01 17:51:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:31,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:31,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:31,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:31,243 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 [2022-03-01 17:51:31,244 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:31,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1635909478, now seen corresponding path program 10 times [2022-03-01 17:51:31,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:31,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592468945] [2022-03-01 17:51:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:31,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:31,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:31,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592468945] [2022-03-01 17:51:31,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592468945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:31,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703671627] [2022-03-01 17:51:31,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:31,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:31,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:31,333 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:31,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:51:31,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:31,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:31,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:31,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:31,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:31,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:51:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:31,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:31,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:31,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:31,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:31,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:31,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703671627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:31,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:31,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:31,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158190486] [2022-03-01 17:51:31,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:31,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:31,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:31,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:31,703 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) [2022-03-01 17:51:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:31,918 INFO L93 Difference]: Finished difference Result 413 states and 1233 transitions. [2022-03-01 17:51:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:51:31,918 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 [2022-03-01 17:51:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:31,920 INFO L225 Difference]: With dead ends: 413 [2022-03-01 17:51:31,920 INFO L226 Difference]: Without dead ends: 402 [2022-03-01 17:51:31,920 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 [2022-03-01 17:51:31,920 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 [2022-03-01 17:51:31,921 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] [2022-03-01 17:51:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-03-01 17:51:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 336. [2022-03-01 17:51:31,926 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) [2022-03-01 17:51:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1008 transitions. [2022-03-01 17:51:31,927 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1008 transitions. Word has length 20 [2022-03-01 17:51:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:31,927 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1008 transitions. [2022-03-01 17:51:31,927 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) [2022-03-01 17:51:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1008 transitions. [2022-03-01 17:51:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:31,928 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:31,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:31,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:32,139 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 [2022-03-01 17:51:32,139 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash -805583803, now seen corresponding path program 11 times [2022-03-01 17:51:32,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:32,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300406612] [2022-03-01 17:51:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:32,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:32,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:32,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300406612] [2022-03-01 17:51:32,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300406612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:32,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474921222] [2022-03-01 17:51:32,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:32,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:32,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:32,216 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:32,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 17:51:32,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:51:32,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:32,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:32,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:32,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:32,343 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 [2022-03-01 17:51:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:32,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:32,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:32,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:32,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:32,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:32,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474921222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:32,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:32,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:32,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561450931] [2022-03-01 17:51:32,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:32,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:32,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:32,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:32,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:32,519 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) [2022-03-01 17:51:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:32,770 INFO L93 Difference]: Finished difference Result 439 states and 1300 transitions. [2022-03-01 17:51:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:51:32,771 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 [2022-03-01 17:51:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:32,772 INFO L225 Difference]: With dead ends: 439 [2022-03-01 17:51:32,772 INFO L226 Difference]: Without dead ends: 428 [2022-03-01 17:51:32,773 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 [2022-03-01 17:51:32,773 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 [2022-03-01 17:51:32,773 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] [2022-03-01 17:51:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-03-01 17:51:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 339. [2022-03-01 17:51:32,779 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) [2022-03-01 17:51:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2022-03-01 17:51:32,780 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2022-03-01 17:51:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:32,780 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2022-03-01 17:51:32,780 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) [2022-03-01 17:51:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2022-03-01 17:51:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:32,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:32,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:32,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:32,994 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 [2022-03-01 17:51:32,994 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash -881419218, now seen corresponding path program 11 times [2022-03-01 17:51:32,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:32,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568620963] [2022-03-01 17:51:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:32,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:33,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:33,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568620963] [2022-03-01 17:51:33,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568620963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:33,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606669146] [2022-03-01 17:51:33,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:33,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:33,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:33,096 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:33,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 17:51:33,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:51:33,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:33,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:33,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:33,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:33,218 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 15 treesize of output 11 [2022-03-01 17:51:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:33,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:33,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:33,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:33,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:33,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:33,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606669146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:33,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:33,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:33,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784326220] [2022-03-01 17:51:33,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:33,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:33,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:33,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:33,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:33,389 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) [2022-03-01 17:51:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:33,662 INFO L93 Difference]: Finished difference Result 429 states and 1275 transitions. [2022-03-01 17:51:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:51:33,662 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 [2022-03-01 17:51:33,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:33,663 INFO L225 Difference]: With dead ends: 429 [2022-03-01 17:51:33,663 INFO L226 Difference]: Without dead ends: 418 [2022-03-01 17:51:33,664 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 [2022-03-01 17:51:33,664 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 [2022-03-01 17:51:33,664 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] [2022-03-01 17:51:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-03-01 17:51:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 339. [2022-03-01 17:51:33,670 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) [2022-03-01 17:51:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1013 transitions. [2022-03-01 17:51:33,672 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1013 transitions. Word has length 20 [2022-03-01 17:51:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:33,672 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1013 transitions. [2022-03-01 17:51:33,672 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) [2022-03-01 17:51:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1013 transitions. [2022-03-01 17:51:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:33,673 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:33,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:33,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:33,887 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 [2022-03-01 17:51:33,887 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:33,888 INFO L85 PathProgramCache]: Analyzing trace with hash -136538836, now seen corresponding path program 12 times [2022-03-01 17:51:33,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:33,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486204919] [2022-03-01 17:51:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:33,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:33,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:33,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486204919] [2022-03-01 17:51:33,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486204919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:33,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281227626] [2022-03-01 17:51:33,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:33,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:33,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:33,992 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:33,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 17:51:34,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:51:34,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:34,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:34,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:34,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:34,223 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-01 17:51:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:34,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:34,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:34,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:34,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281227626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:34,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:34,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:51:34,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170250867] [2022-03-01 17:51:34,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:34,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:51:34,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:34,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:51:34,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:51:34,692 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) [2022-03-01 17:51:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:36,970 INFO L93 Difference]: Finished difference Result 981 states and 2663 transitions. [2022-03-01 17:51:36,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:51:36,971 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 [2022-03-01 17:51:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:36,973 INFO L225 Difference]: With dead ends: 981 [2022-03-01 17:51:36,973 INFO L226 Difference]: Without dead ends: 975 [2022-03-01 17:51:36,974 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 [2022-03-01 17:51:36,974 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 [2022-03-01 17:51:36,974 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] [2022-03-01 17:51:36,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-03-01 17:51:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 358. [2022-03-01 17:51:36,981 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) [2022-03-01 17:51:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1067 transitions. [2022-03-01 17:51:36,982 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1067 transitions. Word has length 20 [2022-03-01 17:51:36,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:36,982 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1067 transitions. [2022-03-01 17:51:36,982 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) [2022-03-01 17:51:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1067 transitions. [2022-03-01 17:51:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:36,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:36,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:37,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-01 17:51:37,193 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 [2022-03-01 17:51:37,193 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:37,193 INFO L85 PathProgramCache]: Analyzing trace with hash -62802732, now seen corresponding path program 13 times [2022-03-01 17:51:37,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:37,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993408678] [2022-03-01 17:51:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:37,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:37,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:37,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993408678] [2022-03-01 17:51:37,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993408678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:37,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901566432] [2022-03-01 17:51:37,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:37,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:37,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:37,298 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:37,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 17:51:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:37,475 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 [2022-03-01 17:51:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:37,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:37,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:37,602 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:51:37,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:37,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:37,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901566432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:37,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:37,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-03-01 17:51:37,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565658277] [2022-03-01 17:51:37,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:37,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:51:37,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:37,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:51:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:51:37,630 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) [2022-03-01 17:51:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:37,985 INFO L93 Difference]: Finished difference Result 602 states and 1749 transitions. [2022-03-01 17:51:37,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:51:37,986 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 [2022-03-01 17:51:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:37,987 INFO L225 Difference]: With dead ends: 602 [2022-03-01 17:51:37,987 INFO L226 Difference]: Without dead ends: 593 [2022-03-01 17:51:37,987 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 [2022-03-01 17:51:37,987 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 [2022-03-01 17:51:37,987 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] [2022-03-01 17:51:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-03-01 17:51:37,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 351. [2022-03-01 17:51:37,993 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) [2022-03-01 17:51:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1043 transitions. [2022-03-01 17:51:37,993 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1043 transitions. Word has length 20 [2022-03-01 17:51:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:37,993 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1043 transitions. [2022-03-01 17:51:37,993 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) [2022-03-01 17:51:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1043 transitions. [2022-03-01 17:51:37,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:37,994 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:37,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:38,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-01 17:51:38,194 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 [2022-03-01 17:51:38,195 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:38,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2099652405, now seen corresponding path program 12 times [2022-03-01 17:51:38,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:38,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649004784] [2022-03-01 17:51:38,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:38,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:38,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:38,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649004784] [2022-03-01 17:51:38,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649004784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:38,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869763002] [2022-03-01 17:51:38,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:38,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:38,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:38,304 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:38,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 17:51:38,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:51:38,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:38,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:38,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:38,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:38,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:38,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:38,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:39,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869763002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:39,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:39,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:51:39,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390223554] [2022-03-01 17:51:39,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:39,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:51:39,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:39,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:51:39,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:51:39,016 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) [2022-03-01 17:51:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:40,092 INFO L93 Difference]: Finished difference Result 587 states and 1698 transitions. [2022-03-01 17:51:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:51:40,092 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 [2022-03-01 17:51:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:40,093 INFO L225 Difference]: With dead ends: 587 [2022-03-01 17:51:40,093 INFO L226 Difference]: Without dead ends: 558 [2022-03-01 17:51:40,094 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 [2022-03-01 17:51:40,094 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 [2022-03-01 17:51:40,094 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] [2022-03-01 17:51:40,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-03-01 17:51:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 360. [2022-03-01 17:51:40,098 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) [2022-03-01 17:51:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1077 transitions. [2022-03-01 17:51:40,099 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1077 transitions. Word has length 20 [2022-03-01 17:51:40,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:40,099 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1077 transitions. [2022-03-01 17:51:40,099 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) [2022-03-01 17:51:40,099 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1077 transitions. [2022-03-01 17:51:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:40,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:40,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:40,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-01 17:51:40,300 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 [2022-03-01 17:51:40,301 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:40,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1481560959, now seen corresponding path program 13 times [2022-03-01 17:51:40,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:40,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011368743] [2022-03-01 17:51:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:40,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:40,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:40,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011368743] [2022-03-01 17:51:40,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011368743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:40,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927345139] [2022-03-01 17:51:40,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:40,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:40,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:40,396 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:40,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 17:51:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:40,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:40,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:40,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:40,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:40,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:40,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:40,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:40,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:40,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:40,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927345139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:40,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:40,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:40,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803608094] [2022-03-01 17:51:40,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:40,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:40,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:40,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:40,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:40,685 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) [2022-03-01 17:51:41,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:41,006 INFO L93 Difference]: Finished difference Result 457 states and 1351 transitions. [2022-03-01 17:51:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:51:41,007 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 [2022-03-01 17:51:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:41,007 INFO L225 Difference]: With dead ends: 457 [2022-03-01 17:51:41,008 INFO L226 Difference]: Without dead ends: 447 [2022-03-01 17:51:41,008 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 [2022-03-01 17:51:41,008 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 [2022-03-01 17:51:41,008 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] [2022-03-01 17:51:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-03-01 17:51:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 363. [2022-03-01 17:51:41,012 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) [2022-03-01 17:51:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1086 transitions. [2022-03-01 17:51:41,013 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1086 transitions. Word has length 20 [2022-03-01 17:51:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:41,013 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1086 transitions. [2022-03-01 17:51:41,013 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) [2022-03-01 17:51:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1086 transitions. [2022-03-01 17:51:41,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:41,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:41,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:41,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:41,214 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 [2022-03-01 17:51:41,214 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:41,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:41,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1979667897, now seen corresponding path program 14 times [2022-03-01 17:51:41,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:41,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287799299] [2022-03-01 17:51:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:41,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:41,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:41,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287799299] [2022-03-01 17:51:41,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287799299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:41,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263931922] [2022-03-01 17:51:41,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:41,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:41,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:41,302 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:41,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 17:51:41,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:41,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:41,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:41,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:41,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:41,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:41,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:41,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:41,798 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:51:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:41,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263931922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:41,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:41,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:51:41,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944691103] [2022-03-01 17:51:41,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:41,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:51:41,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:41,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:51:41,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:51:41,913 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) [2022-03-01 17:51:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:43,903 INFO L93 Difference]: Finished difference Result 663 states and 1878 transitions. [2022-03-01 17:51:43,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 17:51:43,903 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 [2022-03-01 17:51:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:43,904 INFO L225 Difference]: With dead ends: 663 [2022-03-01 17:51:43,904 INFO L226 Difference]: Without dead ends: 631 [2022-03-01 17:51:43,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=782, Invalid=2758, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:51:43,905 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 [2022-03-01 17:51:43,905 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] [2022-03-01 17:51:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-03-01 17:51:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 363. [2022-03-01 17:51:43,911 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) [2022-03-01 17:51:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1086 transitions. [2022-03-01 17:51:43,912 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1086 transitions. Word has length 20 [2022-03-01 17:51:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:43,912 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1086 transitions. [2022-03-01 17:51:43,912 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) [2022-03-01 17:51:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1086 transitions. [2022-03-01 17:51:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:43,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:43,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:43,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-01 17:51:44,114 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 [2022-03-01 17:51:44,114 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:44,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:44,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2061801888, now seen corresponding path program 14 times [2022-03-01 17:51:44,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:44,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690002115] [2022-03-01 17:51:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:44,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:44,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:44,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690002115] [2022-03-01 17:51:44,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690002115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:44,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454747320] [2022-03-01 17:51:44,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:44,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:44,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:44,214 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:44,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 17:51:44,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:44,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:44,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:44,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:44,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:44,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:44,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:44,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:44,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:51:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:44,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454747320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:44,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:44,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-01 17:51:44,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186626014] [2022-03-01 17:51:44,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:44,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:51:44,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:44,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:51:44,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:51:44,873 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) [2022-03-01 17:51:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:46,082 INFO L93 Difference]: Finished difference Result 593 states and 1695 transitions. [2022-03-01 17:51:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:51:46,082 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 [2022-03-01 17:51:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:46,083 INFO L225 Difference]: With dead ends: 593 [2022-03-01 17:51:46,083 INFO L226 Difference]: Without dead ends: 562 [2022-03-01 17:51:46,084 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 [2022-03-01 17:51:46,084 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 242 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-03-01 17:51:46,084 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] [2022-03-01 17:51:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-03-01 17:51:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 373. [2022-03-01 17:51:46,089 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) [2022-03-01 17:51:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1123 transitions. [2022-03-01 17:51:46,090 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1123 transitions. Word has length 20 [2022-03-01 17:51:46,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:46,090 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1123 transitions. [2022-03-01 17:51:46,090 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) [2022-03-01 17:51:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1123 transitions. [2022-03-01 17:51:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:46,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:46,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:46,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-01 17:51:46,291 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 [2022-03-01 17:51:46,291 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:46,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:46,291 INFO L85 PathProgramCache]: Analyzing trace with hash 175206200, now seen corresponding path program 15 times [2022-03-01 17:51:46,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:46,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16037232] [2022-03-01 17:51:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:46,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:46,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:46,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16037232] [2022-03-01 17:51:46,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16037232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:46,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847203641] [2022-03-01 17:51:46,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:46,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:46,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:46,386 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:46,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 17:51:46,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:51:46,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:46,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:46,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:46,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:46,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:46,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:46,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:46,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-03-01 17:51:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:46,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847203641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:46,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:46,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-01 17:51:46,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074246198] [2022-03-01 17:51:46,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:46,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:51:46,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:46,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:51:46,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:51:46,985 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) [2022-03-01 17:51:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:48,487 INFO L93 Difference]: Finished difference Result 610 states and 1761 transitions. [2022-03-01 17:51:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:51:48,487 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 [2022-03-01 17:51:48,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:48,489 INFO L225 Difference]: With dead ends: 610 [2022-03-01 17:51:48,489 INFO L226 Difference]: Without dead ends: 583 [2022-03-01 17:51:48,489 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 [2022-03-01 17:51:48,489 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 [2022-03-01 17:51:48,490 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] [2022-03-01 17:51:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-03-01 17:51:48,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 376. [2022-03-01 17:51:48,495 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) [2022-03-01 17:51:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1133 transitions. [2022-03-01 17:51:48,495 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1133 transitions. Word has length 20 [2022-03-01 17:51:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:48,496 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1133 transitions. [2022-03-01 17:51:48,496 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) [2022-03-01 17:51:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1133 transitions. [2022-03-01 17:51:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:48,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:48,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:48,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:48,698 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 [2022-03-01 17:51:48,698 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:48,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:48,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1243494876, now seen corresponding path program 16 times [2022-03-01 17:51:48,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:48,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954861609] [2022-03-01 17:51:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:48,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:48,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:48,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954861609] [2022-03-01 17:51:48,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954861609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:48,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828032196] [2022-03-01 17:51:48,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:48,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:48,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:48,785 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:48,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 17:51:48,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:48,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:48,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:48,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:48,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:48,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:49,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:49,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 17:51:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:49,079 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:49,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828032196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:49,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:49,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:49,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138825147] [2022-03-01 17:51:49,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:49,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:49,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:49,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:49,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:49,109 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) [2022-03-01 17:51:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:49,396 INFO L93 Difference]: Finished difference Result 457 states and 1362 transitions. [2022-03-01 17:51:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:51:49,397 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 [2022-03-01 17:51:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:49,398 INFO L225 Difference]: With dead ends: 457 [2022-03-01 17:51:49,398 INFO L226 Difference]: Without dead ends: 446 [2022-03-01 17:51:49,398 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 [2022-03-01 17:51:49,398 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 [2022-03-01 17:51:49,398 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] [2022-03-01 17:51:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-03-01 17:51:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 371. [2022-03-01 17:51:49,404 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) [2022-03-01 17:51:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1117 transitions. [2022-03-01 17:51:49,405 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1117 transitions. Word has length 20 [2022-03-01 17:51:49,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:49,405 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1117 transitions. [2022-03-01 17:51:49,405 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) [2022-03-01 17:51:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1117 transitions. [2022-03-01 17:51:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:49,406 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:49,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:49,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:49,619 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 [2022-03-01 17:51:49,619 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:49,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1857680177, now seen corresponding path program 15 times [2022-03-01 17:51:49,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:49,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422915848] [2022-03-01 17:51:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:49,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:49,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:49,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422915848] [2022-03-01 17:51:49,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422915848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:49,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055444472] [2022-03-01 17:51:49,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:49,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:49,712 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:49,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 17:51:49,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:51:49,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:49,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:49,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:49,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:49,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:49,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:50,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:50,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:50,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055444472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:50,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:50,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-03-01 17:51:50,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307945503] [2022-03-01 17:51:50,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:50,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:51:50,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:50,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:51:50,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:51:50,196 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) [2022-03-01 17:51:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:50,582 INFO L93 Difference]: Finished difference Result 520 states and 1540 transitions. [2022-03-01 17:51:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:51:50,582 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 [2022-03-01 17:51:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:50,583 INFO L225 Difference]: With dead ends: 520 [2022-03-01 17:51:50,583 INFO L226 Difference]: Without dead ends: 511 [2022-03-01 17:51:50,584 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 [2022-03-01 17:51:50,584 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-01 17:51:50,584 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] [2022-03-01 17:51:50,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-01 17:51:50,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 378. [2022-03-01 17:51:50,590 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) [2022-03-01 17:51:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1138 transitions. [2022-03-01 17:51:50,591 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1138 transitions. Word has length 20 [2022-03-01 17:51:50,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:50,591 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1138 transitions. [2022-03-01 17:51:50,591 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) [2022-03-01 17:51:50,591 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1138 transitions. [2022-03-01 17:51:50,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:50,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:50,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:50,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-01 17:51:50,792 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 [2022-03-01 17:51:50,793 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1869718179, now seen corresponding path program 16 times [2022-03-01 17:51:50,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:50,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827303999] [2022-03-01 17:51:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:50,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:50,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:50,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827303999] [2022-03-01 17:51:50,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827303999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:50,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469938591] [2022-03-01 17:51:50,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:50,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:50,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:50,876 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:50,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 17:51:50,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:50,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:50,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:50,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:51:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:51,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:51,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:51,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 17:51:51,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:51,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:51,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469938591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:51,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:51,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:51,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697838019] [2022-03-01 17:51:51,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:51,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:51,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:51,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:51,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:51,186 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) [2022-03-01 17:51:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:51,370 INFO L93 Difference]: Finished difference Result 458 states and 1362 transitions. [2022-03-01 17:51:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:51:51,370 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 [2022-03-01 17:51:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:51,371 INFO L225 Difference]: With dead ends: 458 [2022-03-01 17:51:51,371 INFO L226 Difference]: Without dead ends: 448 [2022-03-01 17:51:51,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:51:51,371 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 [2022-03-01 17:51:51,372 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] [2022-03-01 17:51:51,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-03-01 17:51:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 378. [2022-03-01 17:51:51,377 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) [2022-03-01 17:51:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1138 transitions. [2022-03-01 17:51:51,378 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1138 transitions. Word has length 20 [2022-03-01 17:51:51,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:51,378 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1138 transitions. [2022-03-01 17:51:51,378 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) [2022-03-01 17:51:51,378 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1138 transitions. [2022-03-01 17:51:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:51,378 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:51,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:51,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:51,579 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 [2022-03-01 17:51:51,579 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:51,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:51,579 INFO L85 PathProgramCache]: Analyzing trace with hash -493217688, now seen corresponding path program 17 times [2022-03-01 17:51:51,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:51,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119472136] [2022-03-01 17:51:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:51,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:51,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:51,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119472136] [2022-03-01 17:51:51,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119472136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:51,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615991162] [2022-03-01 17:51:51,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:51,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:51,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:51,668 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:51,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 17:51:51,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:51:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:51,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:51,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:51,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:51,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:51,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:51,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:51,946 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-03-01 17:51:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:51,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615991162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:51,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:51,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:51,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786436394] [2022-03-01 17:51:51,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:51,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:51,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:51,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:51,972 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) [2022-03-01 17:51:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:52,154 INFO L93 Difference]: Finished difference Result 466 states and 1385 transitions. [2022-03-01 17:51:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:51:52,155 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 [2022-03-01 17:51:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:52,156 INFO L225 Difference]: With dead ends: 466 [2022-03-01 17:51:52,156 INFO L226 Difference]: Without dead ends: 457 [2022-03-01 17:51:52,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:51:52,156 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 [2022-03-01 17:51:52,156 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] [2022-03-01 17:51:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-03-01 17:51:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 381. [2022-03-01 17:51:52,162 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) [2022-03-01 17:51:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1148 transitions. [2022-03-01 17:51:52,163 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1148 transitions. Word has length 20 [2022-03-01 17:51:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:52,163 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1148 transitions. [2022-03-01 17:51:52,163 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) [2022-03-01 17:51:52,163 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1148 transitions. [2022-03-01 17:51:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:52,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:52,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:52,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-01 17:51:52,367 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 [2022-03-01 17:51:52,367 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:52,368 INFO L85 PathProgramCache]: Analyzing trace with hash 575070988, now seen corresponding path program 18 times [2022-03-01 17:51:52,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:52,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847151669] [2022-03-01 17:51:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:52,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:52,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847151669] [2022-03-01 17:51:52,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847151669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:52,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985102600] [2022-03-01 17:51:52,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:52,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:52,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:52,457 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:52,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 17:51:52,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:51:52,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:52,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:51:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:52,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:52,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:52,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:52,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:52,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 17:51:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:52,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985102600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:52,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:52,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:51:52,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579878308] [2022-03-01 17:51:52,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:52,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:51:52,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:52,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:51:52,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:51:52,988 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) [2022-03-01 17:51:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:54,334 INFO L93 Difference]: Finished difference Result 665 states and 1934 transitions. [2022-03-01 17:51:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:51:54,334 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 [2022-03-01 17:51:54,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:54,335 INFO L225 Difference]: With dead ends: 665 [2022-03-01 17:51:54,335 INFO L226 Difference]: Without dead ends: 641 [2022-03-01 17:51:54,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=440, Invalid=1816, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:51:54,336 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 [2022-03-01 17:51:54,336 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] [2022-03-01 17:51:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-03-01 17:51:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 392. [2022-03-01 17:51:54,344 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) [2022-03-01 17:51:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1189 transitions. [2022-03-01 17:51:54,352 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1189 transitions. Word has length 20 [2022-03-01 17:51:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:54,352 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1189 transitions. [2022-03-01 17:51:54,352 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) [2022-03-01 17:51:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1189 transitions. [2022-03-01 17:51:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:54,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:54,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:54,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:54,567 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 [2022-03-01 17:51:54,567 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1405396663, now seen corresponding path program 17 times [2022-03-01 17:51:54,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:54,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569386646] [2022-03-01 17:51:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:54,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:54,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:54,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569386646] [2022-03-01 17:51:54,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569386646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:54,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479227555] [2022-03-01 17:51:54,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:54,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:54,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:54,652 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:54,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 17:51:54,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:51:54,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:54,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:54,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:54,798 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 16 treesize of output 10 [2022-03-01 17:51:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:54,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:54,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:54,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:54,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:54,939 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 15 treesize of output 3 [2022-03-01 17:51:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:54,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479227555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:54,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:54,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:54,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427136011] [2022-03-01 17:51:54,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:54,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:54,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:54,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:54,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:54,973 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) [2022-03-01 17:51:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:55,168 INFO L93 Difference]: Finished difference Result 487 states and 1457 transitions. [2022-03-01 17:51:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:51:55,169 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 [2022-03-01 17:51:55,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:55,170 INFO L225 Difference]: With dead ends: 487 [2022-03-01 17:51:55,170 INFO L226 Difference]: Without dead ends: 476 [2022-03-01 17:51:55,170 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 [2022-03-01 17:51:55,170 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 [2022-03-01 17:51:55,170 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] [2022-03-01 17:51:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-01 17:51:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 398. [2022-03-01 17:51:55,175 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) [2022-03-01 17:51:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1205 transitions. [2022-03-01 17:51:55,175 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1205 transitions. Word has length 20 [2022-03-01 17:51:55,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:55,176 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1205 transitions. [2022-03-01 17:51:55,176 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) [2022-03-01 17:51:55,176 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1205 transitions. [2022-03-01 17:51:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:55,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:55,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:55,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-01 17:51:55,377 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 [2022-03-01 17:51:55,377 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:55,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1329561248, now seen corresponding path program 19 times [2022-03-01 17:51:55,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:55,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199811205] [2022-03-01 17:51:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:55,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:55,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:55,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199811205] [2022-03-01 17:51:55,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199811205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:55,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828158068] [2022-03-01 17:51:55,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:55,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:55,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:55,453 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:55,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 17:51:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:55,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:55,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:55,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:55,581 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:51:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:55,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:55,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:55,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:51:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:55,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:51:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:55,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828158068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:55,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:55,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:51:55,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615795150] [2022-03-01 17:51:55,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:55,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:51:55,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:55,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:51:55,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:51:55,749 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) [2022-03-01 17:51:55,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:55,983 INFO L93 Difference]: Finished difference Result 469 states and 1405 transitions. [2022-03-01 17:51:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:51:55,983 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 [2022-03-01 17:51:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:55,985 INFO L225 Difference]: With dead ends: 469 [2022-03-01 17:51:55,985 INFO L226 Difference]: Without dead ends: 458 [2022-03-01 17:51:55,985 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 [2022-03-01 17:51:55,985 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-01 17:51:55,985 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] [2022-03-01 17:51:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-03-01 17:51:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 399. [2022-03-01 17:51:55,994 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) [2022-03-01 17:51:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1209 transitions. [2022-03-01 17:51:55,995 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1209 transitions. Word has length 20 [2022-03-01 17:51:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:55,995 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1209 transitions. [2022-03-01 17:51:55,995 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) [2022-03-01 17:51:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1209 transitions. [2022-03-01 17:51:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:55,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:55,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:56,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-01 17:51:56,196 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 [2022-03-01 17:51:56,196 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:56,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:56,197 INFO L85 PathProgramCache]: Analyzing trace with hash 705118312, now seen corresponding path program 20 times [2022-03-01 17:51:56,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:56,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839166662] [2022-03-01 17:51:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:56,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:56,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:56,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839166662] [2022-03-01 17:51:56,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839166662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:56,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100767235] [2022-03-01 17:51:56,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:56,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:56,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:56,296 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:56,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 17:51:56,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:56,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:56,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:51:56,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:56,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:56,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:56,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:56,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:56,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-01 17:51:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:56,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100767235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:56,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:56,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-01 17:51:56,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896127261] [2022-03-01 17:51:56,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:56,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:51:56,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:56,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:51:56,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:51:56,904 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) [2022-03-01 17:51:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:57,693 INFO L93 Difference]: Finished difference Result 663 states and 1893 transitions. [2022-03-01 17:51:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:51:57,694 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 [2022-03-01 17:51:57,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:57,695 INFO L225 Difference]: With dead ends: 663 [2022-03-01 17:51:57,695 INFO L226 Difference]: Without dead ends: 610 [2022-03-01 17:51:57,695 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 [2022-03-01 17:51:57,695 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 [2022-03-01 17:51:57,695 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] [2022-03-01 17:51:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-03-01 17:51:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 400. [2022-03-01 17:51:57,702 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) [2022-03-01 17:51:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1214 transitions. [2022-03-01 17:51:57,703 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1214 transitions. Word has length 20 [2022-03-01 17:51:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:57,704 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1214 transitions. [2022-03-01 17:51:57,704 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) [2022-03-01 17:51:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1214 transitions. [2022-03-01 17:51:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:51:57,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:57,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:51:57,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:57,926 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 [2022-03-01 17:51:57,927 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:51:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:57,927 INFO L85 PathProgramCache]: Analyzing trace with hash -422673061, now seen corresponding path program 18 times [2022-03-01 17:51:57,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:57,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529384386] [2022-03-01 17:51:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:57,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:58,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:58,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529384386] [2022-03-01 17:51:58,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529384386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:58,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309129395] [2022-03-01 17:51:58,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:58,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:58,010 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:58,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:51:58,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:58,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:51:58,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:58,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 17:51:58,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:58,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:51:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:58,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:58,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:58,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:51:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:58,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309129395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:58,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:58,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:51:58,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929718059] [2022-03-01 17:51:58,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:58,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:51:58,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:51:58,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:51:58,589 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) [2022-03-01 17:52:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:00,633 INFO L93 Difference]: Finished difference Result 835 states and 2438 transitions. [2022-03-01 17:52:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 17:52:00,634 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 [2022-03-01 17:52:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:00,639 INFO L225 Difference]: With dead ends: 835 [2022-03-01 17:52:00,639 INFO L226 Difference]: Without dead ends: 806 [2022-03-01 17:52:00,640 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 [2022-03-01 17:52:00,640 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 [2022-03-01 17:52:00,640 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] [2022-03-01 17:52:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-03-01 17:52:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 401. [2022-03-01 17:52:00,650 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) [2022-03-01 17:52:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1217 transitions. [2022-03-01 17:52:00,651 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1217 transitions. Word has length 20 [2022-03-01 17:52:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:00,651 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1217 transitions. [2022-03-01 17:52:00,651 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) [2022-03-01 17:52:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1217 transitions. [2022-03-01 17:52:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:00,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:00,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:00,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:00,873 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 [2022-03-01 17:52:00,874 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:00,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:00,874 INFO L85 PathProgramCache]: Analyzing trace with hash -856702407, now seen corresponding path program 19 times [2022-03-01 17:52:00,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:00,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574139327] [2022-03-01 17:52:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:00,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:00,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:00,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574139327] [2022-03-01 17:52:00,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574139327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:00,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129856772] [2022-03-01 17:52:00,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:00,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:00,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:00,948 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:00,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 17:52:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:00,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:00,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:01,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:01,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:52:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:01,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:01,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:01,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-01 17:52:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:01,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:52:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:01,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129856772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:01,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:01,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:52:01,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796535614] [2022-03-01 17:52:01,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:01,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:52:01,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:01,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:52:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:52:01,246 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) [2022-03-01 17:52:01,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:01,456 INFO L93 Difference]: Finished difference Result 506 states and 1512 transitions. [2022-03-01 17:52:01,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:52:01,456 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 [2022-03-01 17:52:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:01,460 INFO L225 Difference]: With dead ends: 506 [2022-03-01 17:52:01,460 INFO L226 Difference]: Without dead ends: 495 [2022-03-01 17:52:01,460 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 [2022-03-01 17:52:01,460 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 [2022-03-01 17:52:01,461 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] [2022-03-01 17:52:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-01 17:52:01,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 396. [2022-03-01 17:52:01,467 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) [2022-03-01 17:52:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1201 transitions. [2022-03-01 17:52:01,468 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1201 transitions. Word has length 20 [2022-03-01 17:52:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:01,468 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1201 transitions. [2022-03-01 17:52:01,468 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) [2022-03-01 17:52:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1201 transitions. [2022-03-01 17:52:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:01,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:01,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:01,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:01,683 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 [2022-03-01 17:52:01,683 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:01,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1388007308, now seen corresponding path program 21 times [2022-03-01 17:52:01,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:01,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702245028] [2022-03-01 17:52:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:01,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:01,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:01,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702245028] [2022-03-01 17:52:01,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702245028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:01,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703423340] [2022-03-01 17:52:01,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:01,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:01,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:01,772 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:01,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 17:52:01,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:52:01,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:01,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:01,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:01,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:01,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:52:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:02,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:02,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:02,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:52:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:02,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703423340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:02,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:02,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-03-01 17:52:02,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297065566] [2022-03-01 17:52:02,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:02,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:52:02,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:02,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:52:02,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:52:02,297 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) [2022-03-01 17:52:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:02,709 INFO L93 Difference]: Finished difference Result 552 states and 1638 transitions. [2022-03-01 17:52:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:52:02,710 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 [2022-03-01 17:52:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:02,711 INFO L225 Difference]: With dead ends: 552 [2022-03-01 17:52:02,711 INFO L226 Difference]: Without dead ends: 543 [2022-03-01 17:52:02,711 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 [2022-03-01 17:52:02,711 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 [2022-03-01 17:52:02,711 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] [2022-03-01 17:52:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-03-01 17:52:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 393. [2022-03-01 17:52:02,716 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) [2022-03-01 17:52:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1189 transitions. [2022-03-01 17:52:02,717 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1189 transitions. Word has length 20 [2022-03-01 17:52:02,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:02,717 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1189 transitions. [2022-03-01 17:52:02,717 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) [2022-03-01 17:52:02,717 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1189 transitions. [2022-03-01 17:52:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:02,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:02,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:02,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:02,918 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 [2022-03-01 17:52:02,919 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:02,919 INFO L85 PathProgramCache]: Analyzing trace with hash 377918803, now seen corresponding path program 20 times [2022-03-01 17:52:02,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:02,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233297345] [2022-03-01 17:52:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:02,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:03,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:03,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233297345] [2022-03-01 17:52:03,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233297345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:03,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972985587] [2022-03-01 17:52:03,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:03,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:03,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:03,001 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:03,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 17:52:03,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:03,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:03,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:03,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:03,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:52:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:03,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:03,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:03,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:52:03,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:03,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:52:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:03,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972985587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:03,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:03,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:52:03,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330044240] [2022-03-01 17:52:03,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:03,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:52:03,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:03,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:52:03,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:52:03,357 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) [2022-03-01 17:52:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:03,663 INFO L93 Difference]: Finished difference Result 540 states and 1607 transitions. [2022-03-01 17:52:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:52:03,663 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 [2022-03-01 17:52:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:03,664 INFO L225 Difference]: With dead ends: 540 [2022-03-01 17:52:03,664 INFO L226 Difference]: Without dead ends: 530 [2022-03-01 17:52:03,664 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 [2022-03-01 17:52:03,665 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 [2022-03-01 17:52:03,665 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] [2022-03-01 17:52:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-03-01 17:52:03,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 396. [2022-03-01 17:52:03,670 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) [2022-03-01 17:52:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1196 transitions. [2022-03-01 17:52:03,671 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1196 transitions. Word has length 20 [2022-03-01 17:52:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:03,671 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1196 transitions. [2022-03-01 17:52:03,671 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) [2022-03-01 17:52:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1196 transitions. [2022-03-01 17:52:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:03,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:03,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:03,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-01 17:52:03,872 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 [2022-03-01 17:52:03,872 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:03,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:03,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1374169437, now seen corresponding path program 21 times [2022-03-01 17:52:03,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:03,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951035417] [2022-03-01 17:52:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:03,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:03,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:03,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951035417] [2022-03-01 17:52:03,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951035417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:03,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007708736] [2022-03-01 17:52:03,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:03,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:03,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:03,948 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:03,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 17:52:03,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:52:03,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:03,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:03,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:04,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:04,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-03-01 17:52:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:04,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:04,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:04,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:52:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:04,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007708736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:04,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:04,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:52:04,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229382418] [2022-03-01 17:52:04,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:04,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:52:04,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:04,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:52:04,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:52:04,480 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) [2022-03-01 17:52:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:05,063 INFO L93 Difference]: Finished difference Result 576 states and 1697 transitions. [2022-03-01 17:52:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:52:05,063 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 [2022-03-01 17:52:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:05,064 INFO L225 Difference]: With dead ends: 576 [2022-03-01 17:52:05,064 INFO L226 Difference]: Without dead ends: 565 [2022-03-01 17:52:05,065 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 [2022-03-01 17:52:05,065 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 [2022-03-01 17:52:05,065 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] [2022-03-01 17:52:05,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-01 17:52:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 399. [2022-03-01 17:52:05,072 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) [2022-03-01 17:52:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1205 transitions. [2022-03-01 17:52:05,073 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1205 transitions. Word has length 20 [2022-03-01 17:52:05,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:05,073 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1205 transitions. [2022-03-01 17:52:05,073 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) [2022-03-01 17:52:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1205 transitions. [2022-03-01 17:52:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:05,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:05,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:05,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:05,287 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 [2022-03-01 17:52:05,287 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:05,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:05,288 INFO L85 PathProgramCache]: Analyzing trace with hash 646299815, now seen corresponding path program 22 times [2022-03-01 17:52:05,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:05,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124265496] [2022-03-01 17:52:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:05,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:05,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:05,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124265496] [2022-03-01 17:52:05,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124265496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:05,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646626228] [2022-03-01 17:52:05,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:05,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:05,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:05,361 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:05,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 17:52:05,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:05,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:05,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:05,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:05,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:05,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:52:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:05,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:05,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:05,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:52:05,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:05,656 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 11 treesize of output 3 [2022-03-01 17:52:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:05,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646626228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:05,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:05,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:52:05,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321383557] [2022-03-01 17:52:05,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:05,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:52:05,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:52:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:52:05,661 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) [2022-03-01 17:52:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:05,974 INFO L93 Difference]: Finished difference Result 558 states and 1655 transitions. [2022-03-01 17:52:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:52:05,974 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 [2022-03-01 17:52:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:05,976 INFO L225 Difference]: With dead ends: 558 [2022-03-01 17:52:05,976 INFO L226 Difference]: Without dead ends: 549 [2022-03-01 17:52:05,977 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 [2022-03-01 17:52:05,977 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 [2022-03-01 17:52:05,977 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] [2022-03-01 17:52:05,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-03-01 17:52:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 397. [2022-03-01 17:52:05,984 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) [2022-03-01 17:52:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1199 transitions. [2022-03-01 17:52:05,986 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1199 transitions. Word has length 20 [2022-03-01 17:52:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:05,986 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1199 transitions. [2022-03-01 17:52:05,986 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) [2022-03-01 17:52:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1199 transitions. [2022-03-01 17:52:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:05,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:05,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:06,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:06,206 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 [2022-03-01 17:52:06,207 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:06,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1704598050, now seen corresponding path program 22 times [2022-03-01 17:52:06,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:06,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565187033] [2022-03-01 17:52:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:06,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:06,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:06,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565187033] [2022-03-01 17:52:06,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565187033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:06,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046794389] [2022-03-01 17:52:06,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:06,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:06,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:06,295 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:06,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 17:52:06,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:06,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:06,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:06,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:06,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:52:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:06,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:06,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:06,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 17:52:06,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:06,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:52:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:06,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046794389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:06,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:06,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:52:06,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315462821] [2022-03-01 17:52:06,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:06,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:52:06,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:06,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:52:06,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:52:06,592 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) [2022-03-01 17:52:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:06,908 INFO L93 Difference]: Finished difference Result 523 states and 1556 transitions. [2022-03-01 17:52:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:52:06,908 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 [2022-03-01 17:52:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:06,909 INFO L225 Difference]: With dead ends: 523 [2022-03-01 17:52:06,909 INFO L226 Difference]: Without dead ends: 514 [2022-03-01 17:52:06,910 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 [2022-03-01 17:52:06,910 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:06,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 73 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 718 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2022-03-01 17:52:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-03-01 17:52:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 400. [2022-03-01 17:52:06,915 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) [2022-03-01 17:52:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1209 transitions. [2022-03-01 17:52:06,915 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1209 transitions. Word has length 20 [2022-03-01 17:52:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:06,916 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1209 transitions. [2022-03-01 17:52:06,916 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) [2022-03-01 17:52:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1209 transitions. [2022-03-01 17:52:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:06,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:06,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:06,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:07,117 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 [2022-03-01 17:52:07,117 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash -636309374, now seen corresponding path program 23 times [2022-03-01 17:52:07,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:07,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662551883] [2022-03-01 17:52:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:07,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:07,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:07,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662551883] [2022-03-01 17:52:07,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662551883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:07,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229654375] [2022-03-01 17:52:07,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:07,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:07,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:07,193 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:07,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 17:52:07,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:07,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:07,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:07,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:07,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:07,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:52:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:07,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:07,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:07,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:52:07,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:07,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:52:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:07,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229654375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:07,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:07,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:52:07,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458785035] [2022-03-01 17:52:07,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:07,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:52:07,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:52:07,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:52:07,493 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) [2022-03-01 17:52:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:07,797 INFO L93 Difference]: Finished difference Result 520 states and 1552 transitions. [2022-03-01 17:52:07,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:52:07,797 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 [2022-03-01 17:52:07,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:07,798 INFO L225 Difference]: With dead ends: 520 [2022-03-01 17:52:07,798 INFO L226 Difference]: Without dead ends: 509 [2022-03-01 17:52:07,798 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 [2022-03-01 17:52:07,798 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 [2022-03-01 17:52:07,799 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] [2022-03-01 17:52:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-03-01 17:52:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 397. [2022-03-01 17:52:07,803 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) [2022-03-01 17:52:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1199 transitions. [2022-03-01 17:52:07,804 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1199 transitions. Word has length 20 [2022-03-01 17:52:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:07,804 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1199 transitions. [2022-03-01 17:52:07,804 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) [2022-03-01 17:52:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1199 transitions. [2022-03-01 17:52:07,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:07,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:07,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:07,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-01 17:52:08,005 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 [2022-03-01 17:52:08,005 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:08,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash 194016301, now seen corresponding path program 23 times [2022-03-01 17:52:08,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:08,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405725215] [2022-03-01 17:52:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:08,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:08,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:08,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405725215] [2022-03-01 17:52:08,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405725215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:08,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929771060] [2022-03-01 17:52:08,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:08,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:08,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:08,100 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:08,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 17:52:08,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:08,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:08,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:08,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:08,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:08,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:52:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:08,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:08,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:08,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:52:08,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:08,387 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 11 treesize of output 3 [2022-03-01 17:52:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:08,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929771060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:08,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:08,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:52:08,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205584795] [2022-03-01 17:52:08,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:08,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:52:08,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:08,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:52:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:52:08,393 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) [2022-03-01 17:52:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:08,675 INFO L93 Difference]: Finished difference Result 528 states and 1574 transitions. [2022-03-01 17:52:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:52:08,675 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 [2022-03-01 17:52:08,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:08,677 INFO L225 Difference]: With dead ends: 528 [2022-03-01 17:52:08,677 INFO L226 Difference]: Without dead ends: 517 [2022-03-01 17:52:08,677 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 [2022-03-01 17:52:08,677 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 [2022-03-01 17:52:08,677 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] [2022-03-01 17:52:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-03-01 17:52:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 399. [2022-03-01 17:52:08,689 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) [2022-03-01 17:52:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1207 transitions. [2022-03-01 17:52:08,690 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1207 transitions. Word has length 20 [2022-03-01 17:52:08,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:08,690 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1207 transitions. [2022-03-01 17:52:08,690 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) [2022-03-01 17:52:08,690 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1207 transitions. [2022-03-01 17:52:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:08,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:08,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:08,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:08,913 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 [2022-03-01 17:52:08,913 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:08,914 INFO L85 PathProgramCache]: Analyzing trace with hash 118180886, now seen corresponding path program 24 times [2022-03-01 17:52:08,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:08,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657694697] [2022-03-01 17:52:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:08,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:08,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:08,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657694697] [2022-03-01 17:52:08,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657694697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:08,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078801589] [2022-03-01 17:52:08,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:08,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:08,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:08,986 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:08,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 17:52:09,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:52:09,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:09,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:52:09,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:09,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:09,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-01 17:52:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:09,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:09,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:09,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-03-01 17:52:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:09,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078801589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:09,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:09,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:52:09,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257098671] [2022-03-01 17:52:09,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:09,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:52:09,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:52:09,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:52:09,470 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) [2022-03-01 17:52:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:10,652 INFO L93 Difference]: Finished difference Result 602 states and 1788 transitions. [2022-03-01 17:52:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:52:10,653 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 [2022-03-01 17:52:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:10,654 INFO L225 Difference]: With dead ends: 602 [2022-03-01 17:52:10,654 INFO L226 Difference]: Without dead ends: 589 [2022-03-01 17:52:10,654 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 [2022-03-01 17:52:10,654 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 [2022-03-01 17:52:10,654 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] [2022-03-01 17:52:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-03-01 17:52:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 403. [2022-03-01 17:52:10,661 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) [2022-03-01 17:52:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1217 transitions. [2022-03-01 17:52:10,662 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1217 transitions. Word has length 20 [2022-03-01 17:52:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:10,662 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1217 transitions. [2022-03-01 17:52:10,662 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) [2022-03-01 17:52:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1217 transitions. [2022-03-01 17:52:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:10,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:10,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:10,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-01 17:52:10,867 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 [2022-03-01 17:52:10,867 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:10,867 INFO L85 PathProgramCache]: Analyzing trace with hash 881657575, now seen corresponding path program 24 times [2022-03-01 17:52:10,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:10,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614969806] [2022-03-01 17:52:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:10,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:10,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:10,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614969806] [2022-03-01 17:52:10,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614969806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:10,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515358613] [2022-03-01 17:52:10,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:10,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:10,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:10,952 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:10,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 17:52:10,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:52:10,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:10,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:10,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:11,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:11,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:52:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:11,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:11,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:11,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:52:11,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:11,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 17:52:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:11,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515358613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:11,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:11,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-01 17:52:11,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465135059] [2022-03-01 17:52:11,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:11,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:52:11,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:11,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:52:11,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:52:11,243 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) [2022-03-01 17:52:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:11,494 INFO L93 Difference]: Finished difference Result 537 states and 1583 transitions. [2022-03-01 17:52:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:52:11,494 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 [2022-03-01 17:52:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:11,495 INFO L225 Difference]: With dead ends: 537 [2022-03-01 17:52:11,495 INFO L226 Difference]: Without dead ends: 526 [2022-03-01 17:52:11,495 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 [2022-03-01 17:52:11,495 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 [2022-03-01 17:52:11,495 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] [2022-03-01 17:52:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-03-01 17:52:11,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 404. [2022-03-01 17:52:11,501 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) [2022-03-01 17:52:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1219 transitions. [2022-03-01 17:52:11,502 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1219 transitions. Word has length 20 [2022-03-01 17:52:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:11,502 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1219 transitions. [2022-03-01 17:52:11,502 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) [2022-03-01 17:52:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1219 transitions. [2022-03-01 17:52:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:11,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:11,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:11,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:11,717 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 [2022-03-01 17:52:11,718 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:11,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:11,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1555083579, now seen corresponding path program 25 times [2022-03-01 17:52:11,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:11,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486396751] [2022-03-01 17:52:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:11,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:11,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:11,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486396751] [2022-03-01 17:52:11,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486396751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:11,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881297719] [2022-03-01 17:52:11,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:11,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:11,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:11,800 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:11,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 17:52:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:11,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:11,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:11,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:11,970 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 16 treesize of output 10 [2022-03-01 17:52:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:12,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:12,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:12,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:52:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:12,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:52:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:12,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881297719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:12,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:12,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:52:12,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937442391] [2022-03-01 17:52:12,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:12,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:52:12,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:52:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:52:12,164 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) [2022-03-01 17:52:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:12,484 INFO L93 Difference]: Finished difference Result 553 states and 1642 transitions. [2022-03-01 17:52:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:52:12,484 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 [2022-03-01 17:52:12,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:12,485 INFO L225 Difference]: With dead ends: 553 [2022-03-01 17:52:12,485 INFO L226 Difference]: Without dead ends: 542 [2022-03-01 17:52:12,485 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 [2022-03-01 17:52:12,486 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 [2022-03-01 17:52:12,486 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] [2022-03-01 17:52:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-03-01 17:52:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 400. [2022-03-01 17:52:12,491 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) [2022-03-01 17:52:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1210 transitions. [2022-03-01 17:52:12,491 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1210 transitions. Word has length 20 [2022-03-01 17:52:12,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:12,492 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1210 transitions. [2022-03-01 17:52:12,492 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) [2022-03-01 17:52:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1210 transitions. [2022-03-01 17:52:12,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:12,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:12,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:12,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 17:52:12,693 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 [2022-03-01 17:52:12,693 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:12,693 INFO L85 PathProgramCache]: Analyzing trace with hash -426527609, now seen corresponding path program 26 times [2022-03-01 17:52:12,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:12,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69212246] [2022-03-01 17:52:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:12,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:12,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:12,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69212246] [2022-03-01 17:52:12,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69212246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:12,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589279939] [2022-03-01 17:52:12,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:12,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:12,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:12,772 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:12,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 17:52:12,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:12,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:12,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:12,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:12,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:12,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-01 17:52:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:12,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:13,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:13,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 17:52:13,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:13,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:52:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:13,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589279939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:13,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:13,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:52:13,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710719806] [2022-03-01 17:52:13,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:13,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:52:13,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:13,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:52:13,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:52:13,052 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) [2022-03-01 17:52:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:13,477 INFO L93 Difference]: Finished difference Result 616 states and 1815 transitions. [2022-03-01 17:52:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:52:13,477 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 [2022-03-01 17:52:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:13,478 INFO L225 Difference]: With dead ends: 616 [2022-03-01 17:52:13,478 INFO L226 Difference]: Without dead ends: 605 [2022-03-01 17:52:13,478 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 [2022-03-01 17:52:13,478 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 [2022-03-01 17:52:13,479 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] [2022-03-01 17:52:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-03-01 17:52:13,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 408. [2022-03-01 17:52:13,489 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) [2022-03-01 17:52:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1230 transitions. [2022-03-01 17:52:13,489 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1230 transitions. Word has length 20 [2022-03-01 17:52:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:13,490 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1230 transitions. [2022-03-01 17:52:13,490 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) [2022-03-01 17:52:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1230 transitions. [2022-03-01 17:52:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:52:13,490 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:13,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:13,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:13,691 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 [2022-03-01 17:52:13,691 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:13,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:13,691 INFO L85 PathProgramCache]: Analyzing trace with hash -493705572, now seen corresponding path program 25 times [2022-03-01 17:52:13,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:13,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415636795] [2022-03-01 17:52:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:13,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:13,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:13,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415636795] [2022-03-01 17:52:13,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415636795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:13,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930209273] [2022-03-01 17:52:13,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:13,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:13,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:13,770 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:13,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 17:52:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:13,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:52:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:13,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:13,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-03-01 17:52:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:13,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:14,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:14,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-01 17:52:14,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:14,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 17:52:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:14,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930209273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:14,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:14,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 17:52:14,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369369444] [2022-03-01 17:52:14,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:14,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:52:14,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:52:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:52:14,058 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) [2022-03-01 17:52:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:14,468 INFO L93 Difference]: Finished difference Result 607 states and 1791 transitions. [2022-03-01 17:52:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:52:14,468 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 [2022-03-01 17:52:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:14,469 INFO L225 Difference]: With dead ends: 607 [2022-03-01 17:52:14,469 INFO L226 Difference]: Without dead ends: 596 [2022-03-01 17:52:14,469 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 [2022-03-01 17:52:14,470 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 [2022-03-01 17:52:14,470 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] [2022-03-01 17:52:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-03-01 17:52:14,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 402. [2022-03-01 17:52:14,476 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) [2022-03-01 17:52:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1214 transitions. [2022-03-01 17:52:14,477 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1214 transitions. Word has length 20 [2022-03-01 17:52:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:14,477 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1214 transitions. [2022-03-01 17:52:14,477 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) [2022-03-01 17:52:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1214 transitions. [2022-03-01 17:52:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:14,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:14,478 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] [2022-03-01 17:52:14,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-01 17:52:14,678 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 [2022-03-01 17:52:14,678 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash 940655469, now seen corresponding path program 27 times [2022-03-01 17:52:14,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:14,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179352307] [2022-03-01 17:52:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:14,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:14,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:14,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179352307] [2022-03-01 17:52:14,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179352307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:14,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956387924] [2022-03-01 17:52:14,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:14,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:14,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:14,709 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:14,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 17:52:14,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:52:14,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:14,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:14,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:14,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:14,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956387924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:14,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:14,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:52:14,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869434705] [2022-03-01 17:52:14,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:14,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:52:14,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:14,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:52:14,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:52:14,815 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) [2022-03-01 17:52:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:14,910 INFO L93 Difference]: Finished difference Result 599 states and 1760 transitions. [2022-03-01 17:52:14,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:52:14,910 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 [2022-03-01 17:52:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:14,911 INFO L225 Difference]: With dead ends: 599 [2022-03-01 17:52:14,911 INFO L226 Difference]: Without dead ends: 599 [2022-03-01 17:52:14,911 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 [2022-03-01 17:52:14,912 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 [2022-03-01 17:52:14,912 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] [2022-03-01 17:52:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-03-01 17:52:14,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 335. [2022-03-01 17:52:14,917 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) [2022-03-01 17:52:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2022-03-01 17:52:14,918 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 22 [2022-03-01 17:52:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:14,918 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2022-03-01 17:52:14,918 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) [2022-03-01 17:52:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2022-03-01 17:52:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:14,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:14,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:14,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-01 17:52:15,119 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 [2022-03-01 17:52:15,119 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1281362867, now seen corresponding path program 28 times [2022-03-01 17:52:15,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:15,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524723091] [2022-03-01 17:52:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:15,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:15,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:15,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524723091] [2022-03-01 17:52:15,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524723091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:15,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235576499] [2022-03-01 17:52:15,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:15,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:15,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:15,152 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:15,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 17:52:15,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:15,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:15,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:15,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:15,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:15,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235576499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:15,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:15,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:52:15,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571505025] [2022-03-01 17:52:15,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:15,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:52:15,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:15,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:52:15,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:52:15,280 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) [2022-03-01 17:52:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:15,437 INFO L93 Difference]: Finished difference Result 500 states and 1455 transitions. [2022-03-01 17:52:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:52:15,437 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 [2022-03-01 17:52:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:15,438 INFO L225 Difference]: With dead ends: 500 [2022-03-01 17:52:15,438 INFO L226 Difference]: Without dead ends: 441 [2022-03-01 17:52:15,438 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 [2022-03-01 17:52:15,438 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 [2022-03-01 17:52:15,439 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] [2022-03-01 17:52:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-03-01 17:52:15,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 335. [2022-03-01 17:52:15,447 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) [2022-03-01 17:52:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1021 transitions. [2022-03-01 17:52:15,447 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1021 transitions. Word has length 22 [2022-03-01 17:52:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:15,448 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1021 transitions. [2022-03-01 17:52:15,448 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) [2022-03-01 17:52:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1021 transitions. [2022-03-01 17:52:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:15,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:15,449 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] [2022-03-01 17:52:15,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:15,663 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 [2022-03-01 17:52:15,663 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:15,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1556134201, now seen corresponding path program 29 times [2022-03-01 17:52:15,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:15,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335147626] [2022-03-01 17:52:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:15,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:15,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:15,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335147626] [2022-03-01 17:52:15,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335147626] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:15,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211878309] [2022-03-01 17:52:15,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:15,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:15,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:15,691 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:15,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 17:52:15,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:15,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:15,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:15,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:15,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:15,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211878309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:15,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:15,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:52:15,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31060687] [2022-03-01 17:52:15,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:15,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:15,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:15,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:15,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:15,816 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) [2022-03-01 17:52:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:15,959 INFO L93 Difference]: Finished difference Result 661 states and 1944 transitions. [2022-03-01 17:52:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:52:15,960 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 [2022-03-01 17:52:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:15,961 INFO L225 Difference]: With dead ends: 661 [2022-03-01 17:52:15,961 INFO L226 Difference]: Without dead ends: 661 [2022-03-01 17:52:15,961 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 [2022-03-01 17:52:15,961 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 [2022-03-01 17:52:15,961 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] [2022-03-01 17:52:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-03-01 17:52:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 389. [2022-03-01 17:52:15,967 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) [2022-03-01 17:52:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1211 transitions. [2022-03-01 17:52:15,967 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1211 transitions. Word has length 22 [2022-03-01 17:52:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:15,967 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1211 transitions. [2022-03-01 17:52:15,968 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) [2022-03-01 17:52:15,968 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1211 transitions. [2022-03-01 17:52:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:15,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:15,968 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] [2022-03-01 17:52:15,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:16,168 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 [2022-03-01 17:52:16,169 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1860149017, now seen corresponding path program 30 times [2022-03-01 17:52:16,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:16,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312075546] [2022-03-01 17:52:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:16,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:16,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:16,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312075546] [2022-03-01 17:52:16,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312075546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:16,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531091773] [2022-03-01 17:52:16,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:16,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:16,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:16,193 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:16,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 17:52:16,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:52:16,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:16,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:16,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:16,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:16,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531091773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:16,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:16,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:52:16,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704774524] [2022-03-01 17:52:16,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:16,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:16,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:16,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:16,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:16,334 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) [2022-03-01 17:52:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:16,597 INFO L93 Difference]: Finished difference Result 721 states and 2031 transitions. [2022-03-01 17:52:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:52:16,598 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 [2022-03-01 17:52:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:16,599 INFO L225 Difference]: With dead ends: 721 [2022-03-01 17:52:16,599 INFO L226 Difference]: Without dead ends: 685 [2022-03-01 17:52:16,599 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 [2022-03-01 17:52:16,600 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 173 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-01 17:52:16,600 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] [2022-03-01 17:52:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-03-01 17:52:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 493. [2022-03-01 17:52:16,607 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) [2022-03-01 17:52:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1515 transitions. [2022-03-01 17:52:16,608 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1515 transitions. Word has length 22 [2022-03-01 17:52:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:16,609 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1515 transitions. [2022-03-01 17:52:16,609 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) [2022-03-01 17:52:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1515 transitions. [2022-03-01 17:52:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:16,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:16,610 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] [2022-03-01 17:52:16,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-01 17:52:16,832 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 [2022-03-01 17:52:16,832 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:16,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1623645695, now seen corresponding path program 31 times [2022-03-01 17:52:16,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:16,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428176412] [2022-03-01 17:52:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:16,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:16,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:16,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428176412] [2022-03-01 17:52:16,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428176412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:16,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109072526] [2022-03-01 17:52:16,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:16,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:16,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:16,857 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:16,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 17:52:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:16,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:16,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:16,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:16,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109072526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:16,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:16,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:52:16,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441904766] [2022-03-01 17:52:16,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:16,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:16,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:16,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:16,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:16,984 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) [2022-03-01 17:52:17,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:17,148 INFO L93 Difference]: Finished difference Result 955 states and 2765 transitions. [2022-03-01 17:52:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:52:17,148 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 [2022-03-01 17:52:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:17,149 INFO L225 Difference]: With dead ends: 955 [2022-03-01 17:52:17,149 INFO L226 Difference]: Without dead ends: 955 [2022-03-01 17:52:17,149 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 [2022-03-01 17:52:17,150 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 [2022-03-01 17:52:17,150 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] [2022-03-01 17:52:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-03-01 17:52:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 537. [2022-03-01 17:52:17,157 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) [2022-03-01 17:52:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1701 transitions. [2022-03-01 17:52:17,158 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1701 transitions. Word has length 22 [2022-03-01 17:52:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:17,158 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1701 transitions. [2022-03-01 17:52:17,158 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) [2022-03-01 17:52:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1701 transitions. [2022-03-01 17:52:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:17,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:17,159 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] [2022-03-01 17:52:17,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:17,359 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 [2022-03-01 17:52:17,359 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1746864421, now seen corresponding path program 32 times [2022-03-01 17:52:17,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:17,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752603549] [2022-03-01 17:52:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:17,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:17,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:17,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752603549] [2022-03-01 17:52:17,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752603549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:17,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890336128] [2022-03-01 17:52:17,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:17,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:17,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:17,389 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:17,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 17:52:17,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:17,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:17,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:17,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:17,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:17,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890336128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:17,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:17,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:52:17,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400017351] [2022-03-01 17:52:17,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:17,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:17,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:17,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:17,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:17,547 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) [2022-03-01 17:52:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:17,828 INFO L93 Difference]: Finished difference Result 855 states and 2523 transitions. [2022-03-01 17:52:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:52:17,829 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 [2022-03-01 17:52:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:17,831 INFO L225 Difference]: With dead ends: 855 [2022-03-01 17:52:17,831 INFO L226 Difference]: Without dead ends: 831 [2022-03-01 17:52:17,831 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 [2022-03-01 17:52:17,831 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 158 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-01 17:52:17,831 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] [2022-03-01 17:52:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-03-01 17:52:17,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 569. [2022-03-01 17:52:17,841 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) [2022-03-01 17:52:17,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1826 transitions. [2022-03-01 17:52:17,842 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1826 transitions. Word has length 22 [2022-03-01 17:52:17,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:17,842 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1826 transitions. [2022-03-01 17:52:17,842 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) [2022-03-01 17:52:17,842 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1826 transitions. [2022-03-01 17:52:17,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:17,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:17,843 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] [2022-03-01 17:52:17,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-01 17:52:18,043 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 [2022-03-01 17:52:18,043 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:18,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:18,044 INFO L85 PathProgramCache]: Analyzing trace with hash 676108133, now seen corresponding path program 33 times [2022-03-01 17:52:18,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:18,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240044925] [2022-03-01 17:52:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:18,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:18,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:18,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240044925] [2022-03-01 17:52:18,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240044925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:18,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834734932] [2022-03-01 17:52:18,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:18,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:18,068 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:18,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 17:52:18,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:52:18,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:18,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:18,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:18,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:18,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834734932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:18,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:18,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:52:18,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317151403] [2022-03-01 17:52:18,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:18,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:18,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:18,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:18,177 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) [2022-03-01 17:52:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:18,325 INFO L93 Difference]: Finished difference Result 818 states and 2433 transitions. [2022-03-01 17:52:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:52:18,326 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 [2022-03-01 17:52:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:18,327 INFO L225 Difference]: With dead ends: 818 [2022-03-01 17:52:18,327 INFO L226 Difference]: Without dead ends: 797 [2022-03-01 17:52:18,327 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 [2022-03-01 17:52:18,327 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 [2022-03-01 17:52:18,327 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] [2022-03-01 17:52:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-03-01 17:52:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 538. [2022-03-01 17:52:18,334 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) [2022-03-01 17:52:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1735 transitions. [2022-03-01 17:52:18,335 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1735 transitions. Word has length 22 [2022-03-01 17:52:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:18,335 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1735 transitions. [2022-03-01 17:52:18,335 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) [2022-03-01 17:52:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1735 transitions. [2022-03-01 17:52:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:18,336 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:18,336 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] [2022-03-01 17:52:18,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:18,537 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 [2022-03-01 17:52:18,537 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:18,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1388287935, now seen corresponding path program 34 times [2022-03-01 17:52:18,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:18,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025078594] [2022-03-01 17:52:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:18,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:18,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:18,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025078594] [2022-03-01 17:52:18,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025078594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:18,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289965862] [2022-03-01 17:52:18,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:18,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:18,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:18,569 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:18,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 17:52:18,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:18,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:18,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:18,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:18,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:18,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289965862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:18,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:18,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:52:18,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89454616] [2022-03-01 17:52:18,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:18,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:18,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:18,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:18,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:18,688 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) [2022-03-01 17:52:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:18,885 INFO L93 Difference]: Finished difference Result 813 states and 2443 transitions. [2022-03-01 17:52:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:52:18,886 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 [2022-03-01 17:52:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:18,887 INFO L225 Difference]: With dead ends: 813 [2022-03-01 17:52:18,887 INFO L226 Difference]: Without dead ends: 803 [2022-03-01 17:52:18,887 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 [2022-03-01 17:52:18,887 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 [2022-03-01 17:52:18,887 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] [2022-03-01 17:52:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-03-01 17:52:18,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 544. [2022-03-01 17:52:18,893 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) [2022-03-01 17:52:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1742 transitions. [2022-03-01 17:52:18,894 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1742 transitions. Word has length 22 [2022-03-01 17:52:18,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:18,894 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1742 transitions. [2022-03-01 17:52:18,894 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) [2022-03-01 17:52:18,895 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1742 transitions. [2022-03-01 17:52:18,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:18,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:18,895 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] [2022-03-01 17:52:18,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-01 17:52:19,096 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 [2022-03-01 17:52:19,096 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:19,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:19,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1312956920, now seen corresponding path program 3 times [2022-03-01 17:52:19,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:19,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612407037] [2022-03-01 17:52:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:19,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:19,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:19,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612407037] [2022-03-01 17:52:19,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612407037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:19,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484136967] [2022-03-01 17:52:19,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:19,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:19,122 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:19,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 17:52:19,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:52:19,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:19,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:19,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:19,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:19,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484136967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:19,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:19,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:52:19,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760657751] [2022-03-01 17:52:19,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:19,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:52:19,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:19,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:52:19,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:52:19,256 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) [2022-03-01 17:52:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:19,472 INFO L93 Difference]: Finished difference Result 1170 states and 3502 transitions. [2022-03-01 17:52:19,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:52:19,472 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 [2022-03-01 17:52:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:19,474 INFO L225 Difference]: With dead ends: 1170 [2022-03-01 17:52:19,474 INFO L226 Difference]: Without dead ends: 1170 [2022-03-01 17:52:19,474 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 [2022-03-01 17:52:19,474 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 [2022-03-01 17:52:19,474 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] [2022-03-01 17:52:19,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-03-01 17:52:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 535. [2022-03-01 17:52:19,482 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) [2022-03-01 17:52:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1738 transitions. [2022-03-01 17:52:19,483 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1738 transitions. Word has length 22 [2022-03-01 17:52:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:19,483 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 1738 transitions. [2022-03-01 17:52:19,483 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) [2022-03-01 17:52:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1738 transitions. [2022-03-01 17:52:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:19,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:19,484 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] [2022-03-01 17:52:19,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:19,684 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 [2022-03-01 17:52:19,685 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:19,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:19,686 INFO L85 PathProgramCache]: Analyzing trace with hash 660903613, now seen corresponding path program 35 times [2022-03-01 17:52:19,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:19,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256805206] [2022-03-01 17:52:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:19,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:19,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:19,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256805206] [2022-03-01 17:52:19,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256805206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:19,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628330486] [2022-03-01 17:52:19,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:19,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:19,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:19,710 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:19,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 17:52:19,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:52:19,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:19,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:19,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:19,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:19,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628330486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:19,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:19,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:52:19,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966226810] [2022-03-01 17:52:19,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:19,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:19,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:19,873 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) [2022-03-01 17:52:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:20,095 INFO L93 Difference]: Finished difference Result 1254 states and 3793 transitions. [2022-03-01 17:52:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:52:20,095 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 [2022-03-01 17:52:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:20,097 INFO L225 Difference]: With dead ends: 1254 [2022-03-01 17:52:20,098 INFO L226 Difference]: Without dead ends: 1254 [2022-03-01 17:52:20,098 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 [2022-03-01 17:52:20,098 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:20,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 114 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:52:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-03-01 17:52:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 651. [2022-03-01 17:52:20,110 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) [2022-03-01 17:52:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2196 transitions. [2022-03-01 17:52:20,112 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2196 transitions. Word has length 22 [2022-03-01 17:52:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:20,112 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 2196 transitions. [2022-03-01 17:52:20,112 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) [2022-03-01 17:52:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2196 transitions. [2022-03-01 17:52:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:20,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:20,114 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] [2022-03-01 17:52:20,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:20,335 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 [2022-03-01 17:52:20,335 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 896261373, now seen corresponding path program 36 times [2022-03-01 17:52:20,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:20,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825042235] [2022-03-01 17:52:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:20,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:52:20,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:20,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825042235] [2022-03-01 17:52:20,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825042235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:20,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966148238] [2022-03-01 17:52:20,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:20,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:20,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:20,357 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:20,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 17:52:20,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:52:20,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:20,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:20,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:20,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:52:20,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966148238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:20,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:20,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:52:20,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24622411] [2022-03-01 17:52:20,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:20,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:20,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:20,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:20,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:20,471 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) [2022-03-01 17:52:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:20,700 INFO L93 Difference]: Finished difference Result 1121 states and 3415 transitions. [2022-03-01 17:52:20,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:52:20,701 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 [2022-03-01 17:52:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:20,702 INFO L225 Difference]: With dead ends: 1121 [2022-03-01 17:52:20,702 INFO L226 Difference]: Without dead ends: 1116 [2022-03-01 17:52:20,703 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 [2022-03-01 17:52:20,703 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 [2022-03-01 17:52:20,703 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] [2022-03-01 17:52:20,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-03-01 17:52:20,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 651. [2022-03-01 17:52:20,712 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) [2022-03-01 17:52:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2191 transitions. [2022-03-01 17:52:20,713 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2191 transitions. Word has length 22 [2022-03-01 17:52:20,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:20,713 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 2191 transitions. [2022-03-01 17:52:20,713 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) [2022-03-01 17:52:20,713 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2191 transitions. [2022-03-01 17:52:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:20,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:20,714 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] [2022-03-01 17:52:20,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-01 17:52:20,914 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 [2022-03-01 17:52:20,915 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:20,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:20,915 INFO L85 PathProgramCache]: Analyzing trace with hash 412104765, now seen corresponding path program 37 times [2022-03-01 17:52:20,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:20,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659132595] [2022-03-01 17:52:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:20,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:20,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:20,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659132595] [2022-03-01 17:52:20,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659132595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:20,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402790996] [2022-03-01 17:52:20,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:20,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:20,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:20,942 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:20,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 17:52:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:20,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:20,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:21,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:21,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402790996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:21,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:21,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:52:21,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703394537] [2022-03-01 17:52:21,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:21,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:52:21,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:21,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:52:21,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:52:21,058 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) [2022-03-01 17:52:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:21,252 INFO L93 Difference]: Finished difference Result 1135 states and 3572 transitions. [2022-03-01 17:52:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:52:21,252 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 [2022-03-01 17:52:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:21,254 INFO L225 Difference]: With dead ends: 1135 [2022-03-01 17:52:21,254 INFO L226 Difference]: Without dead ends: 1127 [2022-03-01 17:52:21,254 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 [2022-03-01 17:52:21,254 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 [2022-03-01 17:52:21,254 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] [2022-03-01 17:52:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-03-01 17:52:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 732. [2022-03-01 17:52:21,263 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) [2022-03-01 17:52:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2504 transitions. [2022-03-01 17:52:21,265 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2504 transitions. Word has length 22 [2022-03-01 17:52:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:21,265 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2504 transitions. [2022-03-01 17:52:21,265 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) [2022-03-01 17:52:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2504 transitions. [2022-03-01 17:52:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:21,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:21,266 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] [2022-03-01 17:52:21,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-01 17:52:21,466 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 [2022-03-01 17:52:21,467 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:21,467 INFO L85 PathProgramCache]: Analyzing trace with hash -235488933, now seen corresponding path program 38 times [2022-03-01 17:52:21,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:21,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321707550] [2022-03-01 17:52:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:21,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:21,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:21,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321707550] [2022-03-01 17:52:21,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321707550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:21,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486935081] [2022-03-01 17:52:21,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:21,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:21,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:21,504 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:21,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 17:52:21,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:21,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:21,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:21,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:21,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:21,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486935081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:21,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:21,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:52:21,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978191937] [2022-03-01 17:52:21,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:21,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:52:21,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:21,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:52:21,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:52:21,647 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) [2022-03-01 17:52:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:21,885 INFO L93 Difference]: Finished difference Result 1172 states and 3674 transitions. [2022-03-01 17:52:21,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:52:21,885 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 [2022-03-01 17:52:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:21,887 INFO L225 Difference]: With dead ends: 1172 [2022-03-01 17:52:21,887 INFO L226 Difference]: Without dead ends: 1172 [2022-03-01 17:52:21,887 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 [2022-03-01 17:52:21,887 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 [2022-03-01 17:52:21,887 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] [2022-03-01 17:52:21,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-03-01 17:52:21,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 754. [2022-03-01 17:52:21,897 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) [2022-03-01 17:52:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2609 transitions. [2022-03-01 17:52:21,898 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2609 transitions. Word has length 22 [2022-03-01 17:52:21,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:21,898 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2609 transitions. [2022-03-01 17:52:21,898 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) [2022-03-01 17:52:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2609 transitions. [2022-03-01 17:52:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:21,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:21,900 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] [2022-03-01 17:52:21,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-01 17:52:22,100 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 [2022-03-01 17:52:22,100 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:22,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:22,101 INFO L85 PathProgramCache]: Analyzing trace with hash 824275693, now seen corresponding path program 39 times [2022-03-01 17:52:22,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:22,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959737521] [2022-03-01 17:52:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:22,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:22,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:22,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959737521] [2022-03-01 17:52:22,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959737521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:22,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128987157] [2022-03-01 17:52:22,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:22,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:22,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:22,127 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:22,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 17:52:22,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:52:22,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:22,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:22,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:22,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:22,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128987157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:22,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:22,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:52:22,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795796374] [2022-03-01 17:52:22,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:22,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:52:22,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:22,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:52:22,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:52:22,259 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) [2022-03-01 17:52:22,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:22,517 INFO L93 Difference]: Finished difference Result 1178 states and 3692 transitions. [2022-03-01 17:52:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:52:22,518 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 [2022-03-01 17:52:22,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:22,520 INFO L225 Difference]: With dead ends: 1178 [2022-03-01 17:52:22,520 INFO L226 Difference]: Without dead ends: 1118 [2022-03-01 17:52:22,520 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 [2022-03-01 17:52:22,520 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:22,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 127 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:52:22,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-03-01 17:52:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 855. [2022-03-01 17:52:22,531 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) [2022-03-01 17:52:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2949 transitions. [2022-03-01 17:52:22,533 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2949 transitions. Word has length 22 [2022-03-01 17:52:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:22,533 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 2949 transitions. [2022-03-01 17:52:22,533 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) [2022-03-01 17:52:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2949 transitions. [2022-03-01 17:52:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:22,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:22,535 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] [2022-03-01 17:52:22,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-01 17:52:22,735 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 [2022-03-01 17:52:22,735 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:22,735 INFO L85 PathProgramCache]: Analyzing trace with hash 673068563, now seen corresponding path program 40 times [2022-03-01 17:52:22,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:22,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865636783] [2022-03-01 17:52:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:22,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:22,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:22,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865636783] [2022-03-01 17:52:22,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865636783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:22,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342147948] [2022-03-01 17:52:22,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:22,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:22,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:22,761 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:22,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 17:52:22,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:22,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:22,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:22,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:22,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:22,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342147948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:22,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:22,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:52:22,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302416885] [2022-03-01 17:52:22,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:22,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:22,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:22,912 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) [2022-03-01 17:52:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:23,139 INFO L93 Difference]: Finished difference Result 1384 states and 4343 transitions. [2022-03-01 17:52:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:52:23,139 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 [2022-03-01 17:52:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:23,142 INFO L225 Difference]: With dead ends: 1384 [2022-03-01 17:52:23,142 INFO L226 Difference]: Without dead ends: 1342 [2022-03-01 17:52:23,143 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 [2022-03-01 17:52:23,143 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:23,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 131 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:52:23,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-03-01 17:52:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1001. [2022-03-01 17:52:23,162 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) [2022-03-01 17:52:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3436 transitions. [2022-03-01 17:52:23,165 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3436 transitions. Word has length 22 [2022-03-01 17:52:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:23,165 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 3436 transitions. [2022-03-01 17:52:23,165 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) [2022-03-01 17:52:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3436 transitions. [2022-03-01 17:52:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:23,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:23,167 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] [2022-03-01 17:52:23,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-01 17:52:23,379 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 [2022-03-01 17:52:23,379 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:23,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:23,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1391327505, now seen corresponding path program 41 times [2022-03-01 17:52:23,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:23,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967423765] [2022-03-01 17:52:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:23,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:23,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:23,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967423765] [2022-03-01 17:52:23,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967423765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:23,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195266939] [2022-03-01 17:52:23,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:23,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:23,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:23,403 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:23,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 17:52:23,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:52:23,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:23,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:23,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:23,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:23,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195266939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:23,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:23,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:52:23,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835100996] [2022-03-01 17:52:23,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:23,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:23,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:23,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:23,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:23,522 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) [2022-03-01 17:52:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:23,738 INFO L93 Difference]: Finished difference Result 1359 states and 4366 transitions. [2022-03-01 17:52:23,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:52:23,738 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 [2022-03-01 17:52:23,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:23,740 INFO L225 Difference]: With dead ends: 1359 [2022-03-01 17:52:23,740 INFO L226 Difference]: Without dead ends: 1354 [2022-03-01 17:52:23,741 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 [2022-03-01 17:52:23,741 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 [2022-03-01 17:52:23,741 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] [2022-03-01 17:52:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-03-01 17:52:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 953. [2022-03-01 17:52:23,754 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) [2022-03-01 17:52:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3241 transitions. [2022-03-01 17:52:23,756 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3241 transitions. Word has length 22 [2022-03-01 17:52:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:23,756 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 3241 transitions. [2022-03-01 17:52:23,756 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) [2022-03-01 17:52:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3241 transitions. [2022-03-01 17:52:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:23,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:23,757 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] [2022-03-01 17:52:23,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-01 17:52:23,957 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 [2022-03-01 17:52:23,958 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:23,958 INFO L85 PathProgramCache]: Analyzing trace with hash -28111141, now seen corresponding path program 42 times [2022-03-01 17:52:23,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:23,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643239414] [2022-03-01 17:52:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:23,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:23,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:23,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643239414] [2022-03-01 17:52:23,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643239414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:23,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404073579] [2022-03-01 17:52:23,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:23,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:23,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:23,985 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:23,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 17:52:24,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:52:24,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:24,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:24,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:24,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:24,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404073579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:24,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:24,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:52:24,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35393236] [2022-03-01 17:52:24,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:24,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:24,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:24,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:24,152 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) [2022-03-01 17:52:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:24,333 INFO L93 Difference]: Finished difference Result 1661 states and 5281 transitions. [2022-03-01 17:52:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:52:24,333 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 [2022-03-01 17:52:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:24,335 INFO L225 Difference]: With dead ends: 1661 [2022-03-01 17:52:24,335 INFO L226 Difference]: Without dead ends: 1661 [2022-03-01 17:52:24,336 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 [2022-03-01 17:52:24,336 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 [2022-03-01 17:52:24,336 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] [2022-03-01 17:52:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-03-01 17:52:24,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1070. [2022-03-01 17:52:24,357 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) [2022-03-01 17:52:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3715 transitions. [2022-03-01 17:52:24,359 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3715 transitions. Word has length 22 [2022-03-01 17:52:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:24,359 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 3715 transitions. [2022-03-01 17:52:24,360 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) [2022-03-01 17:52:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3715 transitions. [2022-03-01 17:52:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:24,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:24,362 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] [2022-03-01 17:52:24,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-01 17:52:24,579 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 [2022-03-01 17:52:24,579 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1520137261, now seen corresponding path program 43 times [2022-03-01 17:52:24,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:24,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868213646] [2022-03-01 17:52:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:24,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:24,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868213646] [2022-03-01 17:52:24,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868213646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:24,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714469162] [2022-03-01 17:52:24,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:24,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:24,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:24,607 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:24,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 17:52:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:24,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:24,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:24,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:24,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714469162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:24,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:24,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:52:24,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753238126] [2022-03-01 17:52:24,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:24,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:24,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:24,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:24,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:24,749 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) [2022-03-01 17:52:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:24,966 INFO L93 Difference]: Finished difference Result 1318 states and 4372 transitions. [2022-03-01 17:52:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:52:24,966 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 [2022-03-01 17:52:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:24,968 INFO L225 Difference]: With dead ends: 1318 [2022-03-01 17:52:24,968 INFO L226 Difference]: Without dead ends: 1294 [2022-03-01 17:52:24,968 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 [2022-03-01 17:52:24,968 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 [2022-03-01 17:52:24,969 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] [2022-03-01 17:52:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-03-01 17:52:24,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1112. [2022-03-01 17:52:24,986 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) [2022-03-01 17:52:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3925 transitions. [2022-03-01 17:52:24,988 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3925 transitions. Word has length 22 [2022-03-01 17:52:24,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:24,989 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3925 transitions. [2022-03-01 17:52:24,989 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) [2022-03-01 17:52:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3925 transitions. [2022-03-01 17:52:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:24,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:24,991 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] [2022-03-01 17:52:25,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:25,209 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 [2022-03-01 17:52:25,210 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:25,210 INFO L85 PathProgramCache]: Analyzing trace with hash -360322321, now seen corresponding path program 44 times [2022-03-01 17:52:25,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:25,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850067969] [2022-03-01 17:52:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:25,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:52:25,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:25,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850067969] [2022-03-01 17:52:25,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850067969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:25,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017024722] [2022-03-01 17:52:25,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:25,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:25,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:25,237 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:25,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 17:52:25,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:25,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:25,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:25,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:52:25,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017024722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:25,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:25,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:52:25,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920704114] [2022-03-01 17:52:25,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:25,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:25,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:25,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:25,386 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) [2022-03-01 17:52:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:25,609 INFO L93 Difference]: Finished difference Result 1655 states and 5369 transitions. [2022-03-01 17:52:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:52:25,609 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 [2022-03-01 17:52:25,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:25,612 INFO L225 Difference]: With dead ends: 1655 [2022-03-01 17:52:25,612 INFO L226 Difference]: Without dead ends: 1650 [2022-03-01 17:52:25,612 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 [2022-03-01 17:52:25,612 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:25,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 123 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:52:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-03-01 17:52:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1058. [2022-03-01 17:52:25,627 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) [2022-03-01 17:52:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3701 transitions. [2022-03-01 17:52:25,629 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3701 transitions. Word has length 22 [2022-03-01 17:52:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:25,629 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3701 transitions. [2022-03-01 17:52:25,629 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) [2022-03-01 17:52:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3701 transitions. [2022-03-01 17:52:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:25,631 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:25,631 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] [2022-03-01 17:52:25,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-01 17:52:25,831 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 [2022-03-01 17:52:25,831 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash -844478929, now seen corresponding path program 45 times [2022-03-01 17:52:25,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:25,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893099888] [2022-03-01 17:52:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:25,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:25,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:25,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893099888] [2022-03-01 17:52:25,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893099888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:25,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265753032] [2022-03-01 17:52:25,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:25,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:25,857 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:25,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 17:52:25,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:52:25,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:25,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:25,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:25,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:25,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265753032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:25,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:25,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:52:25,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211682334] [2022-03-01 17:52:25,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:25,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:52:25,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:25,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:52:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:52:25,989 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) [2022-03-01 17:52:26,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:26,201 INFO L93 Difference]: Finished difference Result 1629 states and 5300 transitions. [2022-03-01 17:52:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:52:26,201 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 [2022-03-01 17:52:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:26,203 INFO L225 Difference]: With dead ends: 1629 [2022-03-01 17:52:26,203 INFO L226 Difference]: Without dead ends: 1621 [2022-03-01 17:52:26,204 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 [2022-03-01 17:52:26,204 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 [2022-03-01 17:52:26,204 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] [2022-03-01 17:52:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-03-01 17:52:26,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1058. [2022-03-01 17:52:26,221 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) [2022-03-01 17:52:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3698 transitions. [2022-03-01 17:52:26,223 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3698 transitions. Word has length 22 [2022-03-01 17:52:26,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:26,223 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3698 transitions. [2022-03-01 17:52:26,224 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) [2022-03-01 17:52:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3698 transitions. [2022-03-01 17:52:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:26,226 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:26,226 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] [2022-03-01 17:52:26,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-01 17:52:26,447 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 [2022-03-01 17:52:26,447 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1228711595, now seen corresponding path program 46 times [2022-03-01 17:52:26,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:26,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059599088] [2022-03-01 17:52:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:26,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:26,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059599088] [2022-03-01 17:52:26,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059599088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:26,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315912125] [2022-03-01 17:52:26,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:26,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:26,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:26,474 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:26,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 17:52:26,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:26,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:26,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:26,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:26,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:26,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315912125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:26,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:26,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:52:26,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188009183] [2022-03-01 17:52:26,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:26,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:26,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:26,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:26,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:26,603 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) [2022-03-01 17:52:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:26,777 INFO L93 Difference]: Finished difference Result 1982 states and 6436 transitions. [2022-03-01 17:52:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:52:26,777 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 [2022-03-01 17:52:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:26,780 INFO L225 Difference]: With dead ends: 1982 [2022-03-01 17:52:26,780 INFO L226 Difference]: Without dead ends: 1982 [2022-03-01 17:52:26,780 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 [2022-03-01 17:52:26,781 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 [2022-03-01 17:52:26,781 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] [2022-03-01 17:52:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2022-03-01 17:52:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1118. [2022-03-01 17:52:26,796 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) [2022-03-01 17:52:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3952 transitions. [2022-03-01 17:52:26,798 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3952 transitions. Word has length 22 [2022-03-01 17:52:26,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:26,798 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3952 transitions. [2022-03-01 17:52:26,798 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) [2022-03-01 17:52:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3952 transitions. [2022-03-01 17:52:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:26,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:26,800 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] [2022-03-01 17:52:26,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-01 17:52:27,000 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 [2022-03-01 17:52:27,000 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1936642699, now seen corresponding path program 47 times [2022-03-01 17:52:27,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:27,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602100762] [2022-03-01 17:52:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:27,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:27,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:27,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602100762] [2022-03-01 17:52:27,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602100762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:27,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82326332] [2022-03-01 17:52:27,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:27,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:27,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:27,028 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:27,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 17:52:27,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:27,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:27,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:27,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:27,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82326332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:27,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:27,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:52:27,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124262704] [2022-03-01 17:52:27,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:27,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:27,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:27,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:27,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:27,184 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) [2022-03-01 17:52:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:27,451 INFO L93 Difference]: Finished difference Result 1528 states and 5019 transitions. [2022-03-01 17:52:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:52:27,452 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 [2022-03-01 17:52:27,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:27,454 INFO L225 Difference]: With dead ends: 1528 [2022-03-01 17:52:27,454 INFO L226 Difference]: Without dead ends: 1504 [2022-03-01 17:52:27,454 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 [2022-03-01 17:52:27,454 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 [2022-03-01 17:52:27,454 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] [2022-03-01 17:52:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-03-01 17:52:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1118. [2022-03-01 17:52:27,478 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) [2022-03-01 17:52:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 3942 transitions. [2022-03-01 17:52:27,480 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 3942 transitions. Word has length 22 [2022-03-01 17:52:27,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:27,480 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 3942 transitions. [2022-03-01 17:52:27,480 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) [2022-03-01 17:52:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 3942 transitions. [2022-03-01 17:52:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:27,482 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:27,482 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] [2022-03-01 17:52:27,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-01 17:52:27,682 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 [2022-03-01 17:52:27,682 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1339423245, now seen corresponding path program 48 times [2022-03-01 17:52:27,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:27,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279852493] [2022-03-01 17:52:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:27,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:27,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:27,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279852493] [2022-03-01 17:52:27,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279852493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:27,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385146855] [2022-03-01 17:52:27,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:27,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:27,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:27,710 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:27,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 17:52:27,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:52:27,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:27,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:27,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385146855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:27,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:27,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:52:27,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099062358] [2022-03-01 17:52:27,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:27,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:27,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:27,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:27,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:27,822 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) [2022-03-01 17:52:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:28,001 INFO L93 Difference]: Finished difference Result 1348 states and 4465 transitions. [2022-03-01 17:52:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:52:28,001 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 [2022-03-01 17:52:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:28,003 INFO L225 Difference]: With dead ends: 1348 [2022-03-01 17:52:28,003 INFO L226 Difference]: Without dead ends: 1348 [2022-03-01 17:52:28,003 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 [2022-03-01 17:52:28,003 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 [2022-03-01 17:52:28,004 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] [2022-03-01 17:52:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-03-01 17:52:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1081. [2022-03-01 17:52:28,017 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) [2022-03-01 17:52:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3773 transitions. [2022-03-01 17:52:28,019 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3773 transitions. Word has length 22 [2022-03-01 17:52:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:28,019 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 3773 transitions. [2022-03-01 17:52:28,019 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) [2022-03-01 17:52:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3773 transitions. [2022-03-01 17:52:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:28,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:28,021 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] [2022-03-01 17:52:28,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:28,235 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 [2022-03-01 17:52:28,235 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:28,236 INFO L85 PathProgramCache]: Analyzing trace with hash -724972823, now seen corresponding path program 49 times [2022-03-01 17:52:28,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:28,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181318943] [2022-03-01 17:52:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:28,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:28,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:28,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181318943] [2022-03-01 17:52:28,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181318943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:28,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703443235] [2022-03-01 17:52:28,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:28,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:28,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:28,262 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:28,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 17:52:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:28,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:28,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703443235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:28,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:28,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:52:28,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537226407] [2022-03-01 17:52:28,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:28,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:28,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:28,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:28,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:28,397 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) [2022-03-01 17:52:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:28,622 INFO L93 Difference]: Finished difference Result 1884 states and 6113 transitions. [2022-03-01 17:52:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:52:28,622 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 [2022-03-01 17:52:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:28,625 INFO L225 Difference]: With dead ends: 1884 [2022-03-01 17:52:28,625 INFO L226 Difference]: Without dead ends: 1879 [2022-03-01 17:52:28,625 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 [2022-03-01 17:52:28,626 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 [2022-03-01 17:52:28,626 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] [2022-03-01 17:52:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2022-03-01 17:52:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1045. [2022-03-01 17:52:28,641 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) [2022-03-01 17:52:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3618 transitions. [2022-03-01 17:52:28,643 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3618 transitions. Word has length 22 [2022-03-01 17:52:28,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:28,643 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3618 transitions. [2022-03-01 17:52:28,644 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) [2022-03-01 17:52:28,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3618 transitions. [2022-03-01 17:52:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:28,645 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:28,645 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] [2022-03-01 17:52:28,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-01 17:52:28,846 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 [2022-03-01 17:52:28,846 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1044869595, now seen corresponding path program 50 times [2022-03-01 17:52:28,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:28,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711346967] [2022-03-01 17:52:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:28,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:28,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:28,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711346967] [2022-03-01 17:52:28,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711346967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:28,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931999518] [2022-03-01 17:52:28,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:28,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:28,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:28,881 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:28,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 17:52:28,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:28,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:28,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:28,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:29,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931999518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:29,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:29,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:52:29,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448373210] [2022-03-01 17:52:29,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:29,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:52:29,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:52:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:52:29,009 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) [2022-03-01 17:52:29,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:29,214 INFO L93 Difference]: Finished difference Result 1515 states and 4939 transitions. [2022-03-01 17:52:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:52:29,215 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 [2022-03-01 17:52:29,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:29,217 INFO L225 Difference]: With dead ends: 1515 [2022-03-01 17:52:29,217 INFO L226 Difference]: Without dead ends: 1507 [2022-03-01 17:52:29,217 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 [2022-03-01 17:52:29,217 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 [2022-03-01 17:52:29,217 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] [2022-03-01 17:52:29,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-03-01 17:52:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1045. [2022-03-01 17:52:29,229 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) [2022-03-01 17:52:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3615 transitions. [2022-03-01 17:52:29,231 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3615 transitions. Word has length 22 [2022-03-01 17:52:29,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:29,231 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3615 transitions. [2022-03-01 17:52:29,231 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) [2022-03-01 17:52:29,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3615 transitions. [2022-03-01 17:52:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:29,233 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:29,233 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] [2022-03-01 17:52:29,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-01 17:52:29,433 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 [2022-03-01 17:52:29,434 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:29,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:29,434 INFO L85 PathProgramCache]: Analyzing trace with hash 562039857, now seen corresponding path program 51 times [2022-03-01 17:52:29,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:29,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010418362] [2022-03-01 17:52:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:29,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:29,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:29,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010418362] [2022-03-01 17:52:29,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010418362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:29,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328864202] [2022-03-01 17:52:29,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:29,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:29,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:29,463 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:29,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 17:52:29,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:52:29,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:29,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:29,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:29,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328864202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:29,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:29,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:52:29,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844759371] [2022-03-01 17:52:29,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:29,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:52:29,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:52:29,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:52:29,566 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) [2022-03-01 17:52:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:29,700 INFO L93 Difference]: Finished difference Result 1319 states and 4427 transitions. [2022-03-01 17:52:29,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:52:29,700 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 [2022-03-01 17:52:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:29,702 INFO L225 Difference]: With dead ends: 1319 [2022-03-01 17:52:29,702 INFO L226 Difference]: Without dead ends: 1319 [2022-03-01 17:52:29,703 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 [2022-03-01 17:52:29,703 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 [2022-03-01 17:52:29,703 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] [2022-03-01 17:52:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-03-01 17:52:29,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1053. [2022-03-01 17:52:29,716 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) [2022-03-01 17:52:29,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3648 transitions. [2022-03-01 17:52:29,717 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3648 transitions. Word has length 22 [2022-03-01 17:52:29,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:29,718 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3648 transitions. [2022-03-01 17:52:29,718 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) [2022-03-01 17:52:29,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3648 transitions. [2022-03-01 17:52:29,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:52:29,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:29,719 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] [2022-03-01 17:52:29,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-01 17:52:29,920 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 [2022-03-01 17:52:29,920 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 280304051, now seen corresponding path program 52 times [2022-03-01 17:52:29,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:29,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786035934] [2022-03-01 17:52:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:29,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:29,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:29,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786035934] [2022-03-01 17:52:29,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786035934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:29,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187980569] [2022-03-01 17:52:29,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:29,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:29,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:29,945 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:29,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 17:52:29,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:29,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:29,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:52:29,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:30,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:30,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187980569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:30,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:30,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:52:30,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019027872] [2022-03-01 17:52:30,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:30,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:52:30,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:52:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:52:30,062 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) [2022-03-01 17:52:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:30,163 INFO L93 Difference]: Finished difference Result 1256 states and 4266 transitions. [2022-03-01 17:52:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:52:30,163 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 [2022-03-01 17:52:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:30,165 INFO L225 Difference]: With dead ends: 1256 [2022-03-01 17:52:30,165 INFO L226 Difference]: Without dead ends: 1247 [2022-03-01 17:52:30,165 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 [2022-03-01 17:52:30,165 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 [2022-03-01 17:52:30,166 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] [2022-03-01 17:52:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-03-01 17:52:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1053. [2022-03-01 17:52:30,176 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) [2022-03-01 17:52:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3647 transitions. [2022-03-01 17:52:30,178 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3647 transitions. Word has length 22 [2022-03-01 17:52:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:30,178 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3647 transitions. [2022-03-01 17:52:30,178 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) [2022-03-01 17:52:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3647 transitions. [2022-03-01 17:52:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:52:30,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:30,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:30,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:30,381 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 [2022-03-01 17:52:30,381 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:30,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1982381327, now seen corresponding path program 53 times [2022-03-01 17:52:30,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:30,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81612283] [2022-03-01 17:52:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:30,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:30,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:30,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81612283] [2022-03-01 17:52:30,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81612283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:30,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707225839] [2022-03-01 17:52:30,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:30,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:30,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:30,611 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:30,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 17:52:30,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:30,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:30,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:30,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:30,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:30,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:30,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:30,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:30,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:52:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:30,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:31,250 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:52:31,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:52:31,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:31,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:31,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:52:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:31,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707225839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:31,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:31,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:52:31,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668714572] [2022-03-01 17:52:31,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:31,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:52:31,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:31,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:52:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:52:31,328 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) [2022-03-01 17:52:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:33,397 INFO L93 Difference]: Finished difference Result 2238 states and 7334 transitions. [2022-03-01 17:52:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 17:52:33,397 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 [2022-03-01 17:52:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:33,401 INFO L225 Difference]: With dead ends: 2238 [2022-03-01 17:52:33,401 INFO L226 Difference]: Without dead ends: 2218 [2022-03-01 17:52:33,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=315, Invalid=3345, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 17:52:33,402 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 [2022-03-01 17:52:33,402 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] [2022-03-01 17:52:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-03-01 17:52:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1144. [2022-03-01 17:52:33,434 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) [2022-03-01 17:52:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 3908 transitions. [2022-03-01 17:52:33,436 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 3908 transitions. Word has length 24 [2022-03-01 17:52:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:33,437 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 3908 transitions. [2022-03-01 17:52:33,437 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) [2022-03-01 17:52:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 3908 transitions. [2022-03-01 17:52:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:52:33,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:33,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:33,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-01 17:52:33,641 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 [2022-03-01 17:52:33,642 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1203543731, now seen corresponding path program 54 times [2022-03-01 17:52:33,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:33,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554015529] [2022-03-01 17:52:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:33,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:33,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:33,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554015529] [2022-03-01 17:52:33,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554015529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:33,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358808188] [2022-03-01 17:52:33,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:33,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:33,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:33,864 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:33,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 17:52:33,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:52:33,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:33,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:52:33,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:34,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:34,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:34,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:34,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:34,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:52:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:34,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:35,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:35,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:35,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:35,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:35,234 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 41 treesize of output 7 [2022-03-01 17:52:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:35,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358808188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:35,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:35,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 17:52:35,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824978375] [2022-03-01 17:52:35,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:35,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:52:35,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:52:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:52:35,266 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) [2022-03-01 17:52:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:36,875 INFO L93 Difference]: Finished difference Result 2453 states and 8302 transitions. [2022-03-01 17:52:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:52:36,876 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 [2022-03-01 17:52:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:36,882 INFO L225 Difference]: With dead ends: 2453 [2022-03-01 17:52:36,882 INFO L226 Difference]: Without dead ends: 2451 [2022-03-01 17:52:36,882 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 [2022-03-01 17:52:36,883 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 [2022-03-01 17:52:36,883 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] [2022-03-01 17:52:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-03-01 17:52:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1173. [2022-03-01 17:52:36,901 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) [2022-03-01 17:52:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3996 transitions. [2022-03-01 17:52:36,904 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3996 transitions. Word has length 24 [2022-03-01 17:52:36,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:36,904 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 3996 transitions. [2022-03-01 17:52:36,904 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) [2022-03-01 17:52:36,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3996 transitions. [2022-03-01 17:52:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:52:36,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:36,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:36,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-01 17:52:37,106 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 [2022-03-01 17:52:37,106 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1332626450, now seen corresponding path program 4 times [2022-03-01 17:52:37,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:37,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345756461] [2022-03-01 17:52:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:37,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:37,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:37,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345756461] [2022-03-01 17:52:37,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345756461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:37,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321866732] [2022-03-01 17:52:37,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:37,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:37,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:37,368 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:37,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 17:52:37,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:37,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:37,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:37,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:37,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:37,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:37,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:37,685 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:52:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:37,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:37,983 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:52:37,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:52:38,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:38,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:38,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:38,034 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 [2022-03-01 17:52:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:38,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321866732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:38,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:38,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:52:38,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194853588] [2022-03-01 17:52:38,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:38,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:52:38,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:38,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:52:38,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:52:38,052 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) [2022-03-01 17:52:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:39,734 INFO L93 Difference]: Finished difference Result 2258 states and 7228 transitions. [2022-03-01 17:52:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:52:39,735 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 [2022-03-01 17:52:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:39,738 INFO L225 Difference]: With dead ends: 2258 [2022-03-01 17:52:39,738 INFO L226 Difference]: Without dead ends: 2248 [2022-03-01 17:52:39,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=238, Invalid=2312, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:52:39,739 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 [2022-03-01 17:52:39,739 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] [2022-03-01 17:52:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2022-03-01 17:52:39,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1125. [2022-03-01 17:52:39,755 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) [2022-03-01 17:52:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3868 transitions. [2022-03-01 17:52:39,757 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3868 transitions. Word has length 24 [2022-03-01 17:52:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:39,757 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 3868 transitions. [2022-03-01 17:52:39,757 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) [2022-03-01 17:52:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3868 transitions. [2022-03-01 17:52:39,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:52:39,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:39,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:39,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-01 17:52:39,959 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 [2022-03-01 17:52:39,959 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1328662509, now seen corresponding path program 55 times [2022-03-01 17:52:39,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:39,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797934705] [2022-03-01 17:52:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:39,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:40,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:40,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797934705] [2022-03-01 17:52:40,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797934705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:40,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581577883] [2022-03-01 17:52:40,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:40,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:40,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:40,185 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:40,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 17:52:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:40,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:40,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:40,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:40,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:40,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:40,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:40,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:52:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:40,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:40,761 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:52:40,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:52:40,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:40,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:40,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:40,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:40,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:52:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:40,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581577883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:40,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:40,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:52:40,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049611685] [2022-03-01 17:52:40,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:40,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:52:40,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:52:40,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:52:40,829 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) [2022-03-01 17:52:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:42,571 INFO L93 Difference]: Finished difference Result 2108 states and 6761 transitions. [2022-03-01 17:52:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:52:42,572 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 [2022-03-01 17:52:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:42,575 INFO L225 Difference]: With dead ends: 2108 [2022-03-01 17:52:42,576 INFO L226 Difference]: Without dead ends: 2101 [2022-03-01 17:52:42,576 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 [2022-03-01 17:52:42,576 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 [2022-03-01 17:52:42,576 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] [2022-03-01 17:52:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2022-03-01 17:52:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1165. [2022-03-01 17:52:42,592 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) [2022-03-01 17:52:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3974 transitions. [2022-03-01 17:52:42,606 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3974 transitions. Word has length 24 [2022-03-01 17:52:42,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:42,607 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 3974 transitions. [2022-03-01 17:52:42,607 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) [2022-03-01 17:52:42,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3974 transitions. [2022-03-01 17:52:42,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:52:42,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:42,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:42,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-01 17:52:42,809 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 [2022-03-01 17:52:42,809 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash -825385579, now seen corresponding path program 56 times [2022-03-01 17:52:42,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:42,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998872020] [2022-03-01 17:52:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:42,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:43,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:43,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998872020] [2022-03-01 17:52:43,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998872020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:43,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799084287] [2022-03-01 17:52:43,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:43,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:43,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:43,037 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:43,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 17:52:43,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:43,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:43,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:52:43,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:43,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:43,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:43,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:43,549 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 29 treesize of output 17 [2022-03-01 17:52:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:43,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:43,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:43,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:43,963 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 37 treesize of output 56 [2022-03-01 17:52:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:44,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799084287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:44,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:44,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-01 17:52:44,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302585361] [2022-03-01 17:52:44,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:44,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:52:44,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:44,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:52:44,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:52:44,135 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) [2022-03-01 17:52:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:46,259 INFO L93 Difference]: Finished difference Result 2244 states and 7154 transitions. [2022-03-01 17:52:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 17:52:46,259 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 [2022-03-01 17:52:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:46,263 INFO L225 Difference]: With dead ends: 2244 [2022-03-01 17:52:46,263 INFO L226 Difference]: Without dead ends: 2227 [2022-03-01 17:52:46,264 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 [2022-03-01 17:52:46,264 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 [2022-03-01 17:52:46,264 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] [2022-03-01 17:52:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2022-03-01 17:52:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 1216. [2022-03-01 17:52:46,281 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) [2022-03-01 17:52:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4108 transitions. [2022-03-01 17:52:46,283 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4108 transitions. Word has length 24 [2022-03-01 17:52:46,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:46,283 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 4108 transitions. [2022-03-01 17:52:46,283 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) [2022-03-01 17:52:46,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4108 transitions. [2022-03-01 17:52:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:52:46,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:46,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:46,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-01 17:52:46,485 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 [2022-03-01 17:52:46,485 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:46,485 INFO L85 PathProgramCache]: Analyzing trace with hash -696302860, now seen corresponding path program 5 times [2022-03-01 17:52:46,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:46,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001610955] [2022-03-01 17:52:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:46,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:46,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:46,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001610955] [2022-03-01 17:52:46,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001610955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:46,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566739282] [2022-03-01 17:52:46,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:46,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:46,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:46,715 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:46,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 17:52:46,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:46,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:46,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:47,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:47,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:47,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:47,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:47,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:52:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:47,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:47,314 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:52:47,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:52:47,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:47,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:47,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:52:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:47,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566739282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:47,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:47,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:52:47,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330633582] [2022-03-01 17:52:47,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:47,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:52:47,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:47,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:52:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:52:47,402 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) [2022-03-01 17:52:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:49,161 INFO L93 Difference]: Finished difference Result 2489 states and 8068 transitions. [2022-03-01 17:52:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:52:49,161 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 [2022-03-01 17:52:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:49,165 INFO L225 Difference]: With dead ends: 2489 [2022-03-01 17:52:49,165 INFO L226 Difference]: Without dead ends: 2482 [2022-03-01 17:52:49,166 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 [2022-03-01 17:52:49,166 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:49,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 233 Invalid, 2812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2050 Invalid, 0 Unknown, 719 Unchecked, 0.8s Time] [2022-03-01 17:52:49,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2022-03-01 17:52:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 1182. [2022-03-01 17:52:49,185 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) [2022-03-01 17:52:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 4028 transitions. [2022-03-01 17:52:49,187 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 4028 transitions. Word has length 24 [2022-03-01 17:52:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:49,187 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 4028 transitions. [2022-03-01 17:52:49,187 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) [2022-03-01 17:52:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 4028 transitions. [2022-03-01 17:52:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:52:49,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:49,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:49,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-01 17:52:49,394 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 [2022-03-01 17:52:49,394 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1876273715, now seen corresponding path program 57 times [2022-03-01 17:52:49,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:49,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861875403] [2022-03-01 17:52:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:49,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:49,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861875403] [2022-03-01 17:52:49,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861875403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:49,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346579674] [2022-03-01 17:52:49,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:49,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:49,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:49,610 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:49,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 17:52:49,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:52:49,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:49,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:52:49,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:50,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:50,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:50,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:50,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:50,209 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 29 treesize of output 17 [2022-03-01 17:52:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:50,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:50,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:50,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:50,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:52:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:50,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346579674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:50,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:50,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-01 17:52:50,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031066797] [2022-03-01 17:52:50,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:50,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:52:50,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:50,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:52:50,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:52:50,722 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) [2022-03-01 17:52:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:52,045 INFO L93 Difference]: Finished difference Result 2242 states and 7149 transitions. [2022-03-01 17:52:52,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:52:52,045 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 [2022-03-01 17:52:52,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:52,049 INFO L225 Difference]: With dead ends: 2242 [2022-03-01 17:52:52,049 INFO L226 Difference]: Without dead ends: 2232 [2022-03-01 17:52:52,049 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 [2022-03-01 17:52:52,049 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:52,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 319 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1287 Invalid, 0 Unknown, 624 Unchecked, 0.6s Time] [2022-03-01 17:52:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2022-03-01 17:52:52,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1224. [2022-03-01 17:52:52,067 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) [2022-03-01 17:52:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4135 transitions. [2022-03-01 17:52:52,069 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4135 transitions. Word has length 24 [2022-03-01 17:52:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:52,069 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 4135 transitions. [2022-03-01 17:52:52,069 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) [2022-03-01 17:52:52,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4135 transitions. [2022-03-01 17:52:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:52:52,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:52,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:52,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-01 17:52:52,271 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 [2022-03-01 17:52:52,271 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:52,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:52,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1043483089, now seen corresponding path program 58 times [2022-03-01 17:52:52,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:52,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692325382] [2022-03-01 17:52:52,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:52,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:52,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:52,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692325382] [2022-03-01 17:52:52,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692325382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:52,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649726155] [2022-03-01 17:52:52,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:52,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:52,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:52,486 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:52,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 17:52:52,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:52,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:52,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:52,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:52,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:52,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:52,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:52,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:52,783 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 [2022-03-01 17:52:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:52,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:53,082 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:52:53,082 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:52:53,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:53,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:53,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:53,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:53,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:52:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:53,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649726155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:53,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:53,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:52:53,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539346842] [2022-03-01 17:52:53,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:53,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:52:53,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:53,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:52:53,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:52:53,143 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) [2022-03-01 17:52:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:55,321 INFO L93 Difference]: Finished difference Result 2323 states and 7425 transitions. [2022-03-01 17:52:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 17:52:55,321 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 [2022-03-01 17:52:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:55,325 INFO L225 Difference]: With dead ends: 2323 [2022-03-01 17:52:55,325 INFO L226 Difference]: Without dead ends: 2312 [2022-03-01 17:52:55,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=367, Invalid=4055, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 17:52:55,325 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 [2022-03-01 17:52:55,325 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] [2022-03-01 17:52:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2022-03-01 17:52:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1189. [2022-03-01 17:52:55,342 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) [2022-03-01 17:52:55,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 4053 transitions. [2022-03-01 17:52:55,345 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 4053 transitions. Word has length 24 [2022-03-01 17:52:55,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:55,345 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 4053 transitions. [2022-03-01 17:52:55,345 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) [2022-03-01 17:52:55,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 4053 transitions. [2022-03-01 17:52:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:52:55,346 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:55,346 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:55,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:55,547 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 [2022-03-01 17:52:55,547 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:55,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:55,547 INFO L85 PathProgramCache]: Analyzing trace with hash 79322356, now seen corresponding path program 6 times [2022-03-01 17:52:55,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:55,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087770148] [2022-03-01 17:52:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:55,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:55,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:55,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087770148] [2022-03-01 17:52:55,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087770148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:55,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852647784] [2022-03-01 17:52:55,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:55,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:55,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:55,749 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:55,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 17:52:55,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:52:55,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:55,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:52:55,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:56,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:56,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:56,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:56,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:56,234 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 22 treesize of output 14 [2022-03-01 17:52:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:56,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:56,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:56,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:56,589 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 [2022-03-01 17:52:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:56,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852647784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:56,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:56,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 34 [2022-03-01 17:52:56,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340234399] [2022-03-01 17:52:56,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:56,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:52:56,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:56,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:52:56,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:52:56,708 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) [2022-03-01 17:52:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:58,250 INFO L93 Difference]: Finished difference Result 2483 states and 8473 transitions. [2022-03-01 17:52:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:52:58,250 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 [2022-03-01 17:52:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:58,255 INFO L225 Difference]: With dead ends: 2483 [2022-03-01 17:52:58,255 INFO L226 Difference]: Without dead ends: 2473 [2022-03-01 17:52:58,255 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 [2022-03-01 17:52:58,255 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 [2022-03-01 17:52:58,255 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] [2022-03-01 17:52:58,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-03-01 17:52:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1210. [2022-03-01 17:52:58,273 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) [2022-03-01 17:52:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4102 transitions. [2022-03-01 17:52:58,275 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4102 transitions. Word has length 24 [2022-03-01 17:52:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:58,275 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 4102 transitions. [2022-03-01 17:52:58,275 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) [2022-03-01 17:52:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4102 transitions. [2022-03-01 17:52:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:52:58,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:58,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:52:58,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-01 17:52:58,483 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 [2022-03-01 17:52:58,483 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:52:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1185123218, now seen corresponding path program 7 times [2022-03-01 17:52:58,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:58,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750605790] [2022-03-01 17:52:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:58,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:58,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:58,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750605790] [2022-03-01 17:52:58,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750605790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:58,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281563964] [2022-03-01 17:52:58,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:58,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:58,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:58,728 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:58,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 17:52:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:58,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:52:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:59,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:59,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:59,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:52:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:59,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:59,425 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:52:59,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:52:59,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:59,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:59,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:59,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:59,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:52:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:59,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281563964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:59,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:59,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:52:59,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544067236] [2022-03-01 17:52:59,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:59,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:52:59,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:59,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:52:59,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:52:59,495 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) [2022-03-01 17:53:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:01,626 INFO L93 Difference]: Finished difference Result 2218 states and 7165 transitions. [2022-03-01 17:53:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:53:01,626 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 [2022-03-01 17:53:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:01,630 INFO L225 Difference]: With dead ends: 2218 [2022-03-01 17:53:01,630 INFO L226 Difference]: Without dead ends: 2213 [2022-03-01 17:53:01,630 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 [2022-03-01 17:53:01,631 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 [2022-03-01 17:53:01,631 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] [2022-03-01 17:53:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2022-03-01 17:53:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1167. [2022-03-01 17:53:01,648 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) [2022-03-01 17:53:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3990 transitions. [2022-03-01 17:53:01,650 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3990 transitions. Word has length 24 [2022-03-01 17:53:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:01,650 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 3990 transitions. [2022-03-01 17:53:01,650 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) [2022-03-01 17:53:01,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3990 transitions. [2022-03-01 17:53:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:01,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:01,652 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] [2022-03-01 17:53:01,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-01 17:53:01,852 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 [2022-03-01 17:53:01,853 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:01,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:01,853 INFO L85 PathProgramCache]: Analyzing trace with hash 608816537, now seen corresponding path program 59 times [2022-03-01 17:53:01,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:01,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296142971] [2022-03-01 17:53:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:01,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:02,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:02,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296142971] [2022-03-01 17:53:02,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296142971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:02,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163092365] [2022-03-01 17:53:02,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:02,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:02,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:02,083 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:02,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 17:53:02,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:53:02,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:02,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:02,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:02,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:02,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:02,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:02,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:02,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:02,716 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:53:02,717 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 [2022-03-01 17:53:02,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:02,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:02,786 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:53:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:02,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163092365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:02,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:02,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:53:02,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238662036] [2022-03-01 17:53:02,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:02,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:53:02,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:02,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:53:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:53:02,811 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) [2022-03-01 17:53:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:04,235 INFO L93 Difference]: Finished difference Result 1768 states and 5895 transitions. [2022-03-01 17:53:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:53:04,236 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 [2022-03-01 17:53:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:04,238 INFO L225 Difference]: With dead ends: 1768 [2022-03-01 17:53:04,239 INFO L226 Difference]: Without dead ends: 1761 [2022-03-01 17:53:04,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:53:04,239 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 [2022-03-01 17:53:04,239 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] [2022-03-01 17:53:04,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-03-01 17:53:04,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1187. [2022-03-01 17:53:04,257 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) [2022-03-01 17:53:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 4045 transitions. [2022-03-01 17:53:04,260 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 4045 transitions. Word has length 24 [2022-03-01 17:53:04,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:04,260 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 4045 transitions. [2022-03-01 17:53:04,261 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) [2022-03-01 17:53:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 4045 transitions. [2022-03-01 17:53:04,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:04,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:04,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:04,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-01 17:53:04,482 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 [2022-03-01 17:53:04,483 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:04,483 INFO L85 PathProgramCache]: Analyzing trace with hash -655629037, now seen corresponding path program 60 times [2022-03-01 17:53:04,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:04,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207211775] [2022-03-01 17:53:04,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:04,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:04,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:04,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207211775] [2022-03-01 17:53:04,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207211775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:04,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426418417] [2022-03-01 17:53:04,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:04,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:04,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:04,695 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:04,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 17:53:04,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:53:04,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:04,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:53:04,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:05,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:05,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:05,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:05,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:05,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:05,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:06,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:06,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:06,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:06,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:06,078 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 41 treesize of output 7 [2022-03-01 17:53:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:06,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426418417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:06,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:06,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 17:53:06,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783875551] [2022-03-01 17:53:06,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:06,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:53:06,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:06,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:53:06,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:53:06,110 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) [2022-03-01 17:53:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:08,096 INFO L93 Difference]: Finished difference Result 2469 states and 8328 transitions. [2022-03-01 17:53:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 17:53:08,096 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 [2022-03-01 17:53:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:08,110 INFO L225 Difference]: With dead ends: 2469 [2022-03-01 17:53:08,110 INFO L226 Difference]: Without dead ends: 2467 [2022-03-01 17:53:08,110 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 [2022-03-01 17:53:08,110 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 [2022-03-01 17:53:08,110 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] [2022-03-01 17:53:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2022-03-01 17:53:08,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 1214. [2022-03-01 17:53:08,128 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) [2022-03-01 17:53:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 4117 transitions. [2022-03-01 17:53:08,130 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 4117 transitions. Word has length 24 [2022-03-01 17:53:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:08,130 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 4117 transitions. [2022-03-01 17:53:08,130 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) [2022-03-01 17:53:08,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 4117 transitions. [2022-03-01 17:53:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:08,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:08,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:08,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-01 17:53:08,332 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 [2022-03-01 17:53:08,332 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:08,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:08,333 INFO L85 PathProgramCache]: Analyzing trace with hash 577333074, now seen corresponding path program 8 times [2022-03-01 17:53:08,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:08,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099316292] [2022-03-01 17:53:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:08,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:08,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:08,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099316292] [2022-03-01 17:53:08,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099316292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:08,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394005020] [2022-03-01 17:53:08,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:08,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:08,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:08,543 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:08,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 17:53:08,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:08,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:08,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:08,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:08,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:08,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:08,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:08,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:09,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:09,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:09,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394005020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:09,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:09,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-01 17:53:09,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700240527] [2022-03-01 17:53:09,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:09,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:53:09,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:09,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:53:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:53:09,645 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) [2022-03-01 17:53:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:14,678 INFO L93 Difference]: Finished difference Result 3512 states and 12210 transitions. [2022-03-01 17:53:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-01 17:53:14,678 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 [2022-03-01 17:53:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:14,695 INFO L225 Difference]: With dead ends: 3512 [2022-03-01 17:53:14,696 INFO L226 Difference]: Without dead ends: 3500 [2022-03-01 17:53:14,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1081, Invalid=8425, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 17:53:14,696 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 [2022-03-01 17:53:14,696 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] [2022-03-01 17:53:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2022-03-01 17:53:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1290. [2022-03-01 17:53:14,719 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) [2022-03-01 17:53:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 4334 transitions. [2022-03-01 17:53:14,721 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 4334 transitions. Word has length 24 [2022-03-01 17:53:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:14,721 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 4334 transitions. [2022-03-01 17:53:14,721 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) [2022-03-01 17:53:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 4334 transitions. [2022-03-01 17:53:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:14,723 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:14,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:14,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:14,924 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 [2022-03-01 17:53:14,924 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash 532275187, now seen corresponding path program 61 times [2022-03-01 17:53:14,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:14,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810810899] [2022-03-01 17:53:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:14,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:15,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:15,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810810899] [2022-03-01 17:53:15,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810810899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:15,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253770560] [2022-03-01 17:53:15,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:15,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:15,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:15,162 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:15,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 17:53:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:15,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:15,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:15,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:15,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:15,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:15,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:15,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:53:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:15,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:15,742 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:53:15,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:15,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:15,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:15,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:15,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:15,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:53:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:15,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253770560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:15,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:15,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:53:15,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097510490] [2022-03-01 17:53:15,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:15,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:53:15,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:15,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:53:15,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:53:15,824 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) [2022-03-01 17:53:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:17,079 INFO L93 Difference]: Finished difference Result 2314 states and 7727 transitions. [2022-03-01 17:53:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:53:17,080 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 [2022-03-01 17:53:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:17,084 INFO L225 Difference]: With dead ends: 2314 [2022-03-01 17:53:17,084 INFO L226 Difference]: Without dead ends: 2307 [2022-03-01 17:53:17,084 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 [2022-03-01 17:53:17,084 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 [2022-03-01 17:53:17,084 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] [2022-03-01 17:53:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2022-03-01 17:53:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1339. [2022-03-01 17:53:17,121 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) [2022-03-01 17:53:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4485 transitions. [2022-03-01 17:53:17,124 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4485 transitions. Word has length 24 [2022-03-01 17:53:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:17,124 INFO L470 AbstractCegarLoop]: Abstraction has 1339 states and 4485 transitions. [2022-03-01 17:53:17,124 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) [2022-03-01 17:53:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4485 transitions. [2022-03-01 17:53:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:17,126 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:17,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:17,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:17,341 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 [2022-03-01 17:53:17,341 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:17,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:17,342 INFO L85 PathProgramCache]: Analyzing trace with hash 335761682, now seen corresponding path program 9 times [2022-03-01 17:53:17,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:17,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864874440] [2022-03-01 17:53:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:17,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:17,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:17,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864874440] [2022-03-01 17:53:17,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864874440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:17,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68469187] [2022-03-01 17:53:17,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:17,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:17,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:17,600 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:17,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 17:53:17,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:53:17,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:17,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:53:17,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:18,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:18,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:18,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:18,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:18,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:53:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:18,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:18,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:18,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:18,547 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 [2022-03-01 17:53:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:18,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68469187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:18,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:18,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:53:18,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276011922] [2022-03-01 17:53:18,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:18,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:53:18,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:18,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:53:18,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:53:18,689 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) [2022-03-01 17:53:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:21,307 INFO L93 Difference]: Finished difference Result 2562 states and 8265 transitions. [2022-03-01 17:53:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 17:53:21,307 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 [2022-03-01 17:53:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:21,312 INFO L225 Difference]: With dead ends: 2562 [2022-03-01 17:53:21,312 INFO L226 Difference]: Without dead ends: 2543 [2022-03-01 17:53:21,312 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 [2022-03-01 17:53:21,312 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 [2022-03-01 17:53:21,312 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] [2022-03-01 17:53:21,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-03-01 17:53:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 1371. [2022-03-01 17:53:21,331 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) [2022-03-01 17:53:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4582 transitions. [2022-03-01 17:53:21,334 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4582 transitions. Word has length 24 [2022-03-01 17:53:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:21,334 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 4582 transitions. [2022-03-01 17:53:21,334 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) [2022-03-01 17:53:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4582 transitions. [2022-03-01 17:53:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:21,336 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:21,336 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] [2022-03-01 17:53:21,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-01 17:53:21,536 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 [2022-03-01 17:53:21,537 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:21,537 INFO L85 PathProgramCache]: Analyzing trace with hash 911530733, now seen corresponding path program 62 times [2022-03-01 17:53:21,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:21,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940018824] [2022-03-01 17:53:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:21,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:21,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:21,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940018824] [2022-03-01 17:53:21,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940018824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:21,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006612504] [2022-03-01 17:53:21,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:21,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:21,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:21,765 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:21,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 17:53:21,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:21,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:53:21,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:22,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:22,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:22,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:22,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:22,109 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-01 17:53:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:22,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:22,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:22,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:22,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:22,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:22,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006612504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:22,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:22,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:53:22,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316285457] [2022-03-01 17:53:22,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:22,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:53:22,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:22,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:53:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:22,994 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) [2022-03-01 17:53:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:24,454 INFO L93 Difference]: Finished difference Result 3295 states and 11576 transitions. [2022-03-01 17:53:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 17:53:24,454 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 [2022-03-01 17:53:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:24,461 INFO L225 Difference]: With dead ends: 3295 [2022-03-01 17:53:24,461 INFO L226 Difference]: Without dead ends: 3283 [2022-03-01 17:53:24,461 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 [2022-03-01 17:53:24,461 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 [2022-03-01 17:53:24,461 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] [2022-03-01 17:53:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2022-03-01 17:53:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 1421. [2022-03-01 17:53:24,486 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) [2022-03-01 17:53:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4746 transitions. [2022-03-01 17:53:24,488 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4746 transitions. Word has length 24 [2022-03-01 17:53:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:24,488 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 4746 transitions. [2022-03-01 17:53:24,488 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) [2022-03-01 17:53:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4746 transitions. [2022-03-01 17:53:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:24,490 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:24,490 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] [2022-03-01 17:53:24,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-01 17:53:24,690 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 [2022-03-01 17:53:24,691 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:24,691 INFO L85 PathProgramCache]: Analyzing trace with hash -743780497, now seen corresponding path program 63 times [2022-03-01 17:53:24,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:24,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285504684] [2022-03-01 17:53:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:24,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:24,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:24,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285504684] [2022-03-01 17:53:24,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285504684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:24,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364595016] [2022-03-01 17:53:24,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:24,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:24,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:24,972 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:24,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 17:53:25,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:53:25,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:25,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:53:25,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:25,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:25,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:25,546 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 29 treesize of output 17 [2022-03-01 17:53:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:25,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:25,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:25,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:25,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:26,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364595016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:26,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:26,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:53:26,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627752194] [2022-03-01 17:53:26,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:26,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:53:26,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:53:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:53:26,087 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) [2022-03-01 17:53:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:29,100 INFO L93 Difference]: Finished difference Result 2354 states and 7764 transitions. [2022-03-01 17:53:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 17:53:29,100 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 [2022-03-01 17:53:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:29,104 INFO L225 Difference]: With dead ends: 2354 [2022-03-01 17:53:29,104 INFO L226 Difference]: Without dead ends: 2342 [2022-03-01 17:53:29,104 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 [2022-03-01 17:53:29,104 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 [2022-03-01 17:53:29,104 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] [2022-03-01 17:53:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-03-01 17:53:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1445. [2022-03-01 17:53:29,122 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) [2022-03-01 17:53:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 4817 transitions. [2022-03-01 17:53:29,125 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 4817 transitions. Word has length 24 [2022-03-01 17:53:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:29,125 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 4817 transitions. [2022-03-01 17:53:29,125 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) [2022-03-01 17:53:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 4817 transitions. [2022-03-01 17:53:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:29,127 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:29,127 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:29,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-01 17:53:29,327 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 [2022-03-01 17:53:29,328 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:29,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1925562905, now seen corresponding path program 64 times [2022-03-01 17:53:29,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:29,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419474643] [2022-03-01 17:53:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:29,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:29,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:29,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419474643] [2022-03-01 17:53:29,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419474643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:29,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136807545] [2022-03-01 17:53:29,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:29,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:29,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:29,567 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:29,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 17:53:29,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:29,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:29,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:29,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:29,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:29,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:29,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:53:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:29,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:30,167 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:53:30,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:53:30,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:30,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:30,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:30,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:30,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:53:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:30,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136807545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:30,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:30,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:53:30,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250877031] [2022-03-01 17:53:30,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:30,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:53:30,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:53:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:53:30,240 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) [2022-03-01 17:53:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:31,853 INFO L93 Difference]: Finished difference Result 2494 states and 8183 transitions. [2022-03-01 17:53:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:53:31,854 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 [2022-03-01 17:53:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:31,858 INFO L225 Difference]: With dead ends: 2494 [2022-03-01 17:53:31,858 INFO L226 Difference]: Without dead ends: 2487 [2022-03-01 17:53:31,858 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 [2022-03-01 17:53:31,858 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 [2022-03-01 17:53:31,858 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] [2022-03-01 17:53:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2022-03-01 17:53:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1474. [2022-03-01 17:53:31,878 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) [2022-03-01 17:53:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4912 transitions. [2022-03-01 17:53:31,880 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4912 transitions. Word has length 24 [2022-03-01 17:53:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:31,880 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 4912 transitions. [2022-03-01 17:53:31,880 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) [2022-03-01 17:53:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4912 transitions. [2022-03-01 17:53:31,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:31,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:31,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:31,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-01 17:53:32,083 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 [2022-03-01 17:53:32,083 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:32,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1055124371, now seen corresponding path program 65 times [2022-03-01 17:53:32,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:32,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078957061] [2022-03-01 17:53:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:32,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:32,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:32,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078957061] [2022-03-01 17:53:32,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078957061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:32,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900693246] [2022-03-01 17:53:32,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:32,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:32,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:32,338 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:32,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 17:53:32,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:53:32,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:32,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:32,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:32,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:32,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:53:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:32,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:32,935 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:53:32,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:53:32,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:32,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:32,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:32,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:32,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:53:33,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:33,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900693246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:33,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:33,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:53:33,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110216296] [2022-03-01 17:53:33,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:33,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:53:33,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:33,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:53:33,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:53:33,003 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) [2022-03-01 17:53:34,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:34,748 INFO L93 Difference]: Finished difference Result 2507 states and 8478 transitions. [2022-03-01 17:53:34,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:53:34,749 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 [2022-03-01 17:53:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:34,753 INFO L225 Difference]: With dead ends: 2507 [2022-03-01 17:53:34,753 INFO L226 Difference]: Without dead ends: 2500 [2022-03-01 17:53:34,753 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 [2022-03-01 17:53:34,753 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 [2022-03-01 17:53:34,753 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] [2022-03-01 17:53:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2022-03-01 17:53:34,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 1492. [2022-03-01 17:53:34,771 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) [2022-03-01 17:53:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4970 transitions. [2022-03-01 17:53:34,773 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4970 transitions. Word has length 24 [2022-03-01 17:53:34,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:34,773 INFO L470 AbstractCegarLoop]: Abstraction has 1492 states and 4970 transitions. [2022-03-01 17:53:34,773 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) [2022-03-01 17:53:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4970 transitions. [2022-03-01 17:53:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:34,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:34,775 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] [2022-03-01 17:53:34,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-01 17:53:34,976 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 [2022-03-01 17:53:34,976 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2135632231, now seen corresponding path program 66 times [2022-03-01 17:53:34,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:34,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606107923] [2022-03-01 17:53:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:34,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:35,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:35,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606107923] [2022-03-01 17:53:35,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606107923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:35,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451544362] [2022-03-01 17:53:35,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:35,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:35,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:35,243 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:35,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 17:53:35,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:53:35,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:35,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:53:35,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:35,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:35,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:35,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:35,700 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 [2022-03-01 17:53:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:35,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:36,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:36,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:36,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:53:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:36,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451544362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:36,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:36,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:53:36,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556007391] [2022-03-01 17:53:36,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:36,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:53:36,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:36,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:53:36,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:53:36,614 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) [2022-03-01 17:53:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:38,167 INFO L93 Difference]: Finished difference Result 2317 states and 7712 transitions. [2022-03-01 17:53:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:53:38,167 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 [2022-03-01 17:53:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:38,171 INFO L225 Difference]: With dead ends: 2317 [2022-03-01 17:53:38,171 INFO L226 Difference]: Without dead ends: 2311 [2022-03-01 17:53:38,171 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 [2022-03-01 17:53:38,172 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 [2022-03-01 17:53:38,172 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] [2022-03-01 17:53:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2022-03-01 17:53:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1503. [2022-03-01 17:53:38,200 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) [2022-03-01 17:53:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5002 transitions. [2022-03-01 17:53:38,203 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5002 transitions. Word has length 24 [2022-03-01 17:53:38,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:38,203 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 5002 transitions. [2022-03-01 17:53:38,203 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) [2022-03-01 17:53:38,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5002 transitions. [2022-03-01 17:53:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:38,205 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:38,205 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:38,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-01 17:53:38,405 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 [2022-03-01 17:53:38,405 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:38,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:38,406 INFO L85 PathProgramCache]: Analyzing trace with hash 658794093, now seen corresponding path program 67 times [2022-03-01 17:53:38,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:38,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376811616] [2022-03-01 17:53:38,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:38,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:38,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:38,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376811616] [2022-03-01 17:53:38,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376811616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:38,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045750397] [2022-03-01 17:53:38,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:38,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:38,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:38,704 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:38,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 17:53:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:38,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:39,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:39,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:39,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:39,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:39,016 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:53:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:39,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:39,331 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:53:39,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:39,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:39,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:39,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:39,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:39,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:53:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:39,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045750397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:39,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:39,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:53:39,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587519226] [2022-03-01 17:53:39,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:39,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:53:39,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:39,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:53:39,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:53:39,409 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) [2022-03-01 17:53:40,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:40,617 INFO L93 Difference]: Finished difference Result 1956 states and 6536 transitions. [2022-03-01 17:53:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:53:40,617 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 [2022-03-01 17:53:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:40,621 INFO L225 Difference]: With dead ends: 1956 [2022-03-01 17:53:40,621 INFO L226 Difference]: Without dead ends: 1946 [2022-03-01 17:53:40,621 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 [2022-03-01 17:53:40,621 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 [2022-03-01 17:53:40,621 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] [2022-03-01 17:53:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-03-01 17:53:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1484. [2022-03-01 17:53:40,638 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) [2022-03-01 17:53:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4952 transitions. [2022-03-01 17:53:40,641 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4952 transitions. Word has length 24 [2022-03-01 17:53:40,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:40,641 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 4952 transitions. [2022-03-01 17:53:40,641 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) [2022-03-01 17:53:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4952 transitions. [2022-03-01 17:53:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:40,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:40,643 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] [2022-03-01 17:53:40,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-01 17:53:40,847 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 [2022-03-01 17:53:40,847 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:40,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1996948091, now seen corresponding path program 68 times [2022-03-01 17:53:40,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:40,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084623578] [2022-03-01 17:53:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:40,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:41,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:41,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084623578] [2022-03-01 17:53:41,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084623578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:41,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750506928] [2022-03-01 17:53:41,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:41,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:41,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:41,086 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:41,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 17:53:41,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:41,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:41,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:53:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:41,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:41,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:41,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:41,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:41,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:53:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:41,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:42,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:42,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:42,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:42,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:42,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750506928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:42,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:42,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:53:42,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772123696] [2022-03-01 17:53:42,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:42,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:53:42,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:42,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:53:42,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:42,313 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) [2022-03-01 17:53:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:45,256 INFO L93 Difference]: Finished difference Result 3982 states and 14201 transitions. [2022-03-01 17:53:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 17:53:45,257 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 [2022-03-01 17:53:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:45,264 INFO L225 Difference]: With dead ends: 3982 [2022-03-01 17:53:45,264 INFO L226 Difference]: Without dead ends: 3971 [2022-03-01 17:53:45,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=747, Invalid=5733, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 17:53:45,265 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 [2022-03-01 17:53:45,265 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] [2022-03-01 17:53:45,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2022-03-01 17:53:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 1505. [2022-03-01 17:53:45,307 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) [2022-03-01 17:53:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5023 transitions. [2022-03-01 17:53:45,310 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5023 transitions. Word has length 24 [2022-03-01 17:53:45,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:45,310 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 5023 transitions. [2022-03-01 17:53:45,310 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) [2022-03-01 17:53:45,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5023 transitions. [2022-03-01 17:53:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:45,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:45,312 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] [2022-03-01 17:53:45,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-01 17:53:45,512 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 [2022-03-01 17:53:45,512 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash -682668071, now seen corresponding path program 69 times [2022-03-01 17:53:45,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:45,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627756464] [2022-03-01 17:53:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:45,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:45,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:45,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627756464] [2022-03-01 17:53:45,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627756464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:45,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142139338] [2022-03-01 17:53:45,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:45,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:45,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:45,808 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:45,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 17:53:45,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:53:45,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:45,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:53:45,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:46,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:46,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:46,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:46,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:46,234 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 29 treesize of output 17 [2022-03-01 17:53:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:46,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:46,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:46,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:46,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:46,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142139338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:46,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:46,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:53:46,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169831671] [2022-03-01 17:53:46,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:46,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:53:46,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:46,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:53:46,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:46,740 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) [2022-03-01 17:53:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:47,798 INFO L93 Difference]: Finished difference Result 1914 states and 6410 transitions. [2022-03-01 17:53:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:53:47,799 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 [2022-03-01 17:53:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:47,802 INFO L225 Difference]: With dead ends: 1914 [2022-03-01 17:53:47,802 INFO L226 Difference]: Without dead ends: 1909 [2022-03-01 17:53:47,802 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 [2022-03-01 17:53:47,803 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 [2022-03-01 17:53:47,803 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] [2022-03-01 17:53:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-03-01 17:53:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1506. [2022-03-01 17:53:47,818 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) [2022-03-01 17:53:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5025 transitions. [2022-03-01 17:53:47,835 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5025 transitions. Word has length 24 [2022-03-01 17:53:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:47,835 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 5025 transitions. [2022-03-01 17:53:47,836 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) [2022-03-01 17:53:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5025 transitions. [2022-03-01 17:53:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:47,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:47,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:47,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-01 17:53:48,038 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 [2022-03-01 17:53:48,038 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:48,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2004616198, now seen corresponding path program 2 times [2022-03-01 17:53:48,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:48,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737702895] [2022-03-01 17:53:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:48,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:48,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:48,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737702895] [2022-03-01 17:53:48,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737702895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:48,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143918485] [2022-03-01 17:53:48,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:48,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:48,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:48,280 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:48,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 17:53:48,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:48,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:48,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:53:48,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:48,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:48,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:48,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:48,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:48,625 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-01 17:53:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:48,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:49,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:49,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:49,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:49,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:49,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143918485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:49,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:49,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:53:49,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142074306] [2022-03-01 17:53:49,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:49,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:53:49,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:53:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:49,451 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) [2022-03-01 17:53:51,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:51,721 INFO L93 Difference]: Finished difference Result 4648 states and 16987 transitions. [2022-03-01 17:53:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:53:51,721 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 [2022-03-01 17:53:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:51,730 INFO L225 Difference]: With dead ends: 4648 [2022-03-01 17:53:51,730 INFO L226 Difference]: Without dead ends: 4646 [2022-03-01 17:53:51,730 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 [2022-03-01 17:53:51,730 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 [2022-03-01 17:53:51,731 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] [2022-03-01 17:53:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2022-03-01 17:53:51,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 1557. [2022-03-01 17:53:51,773 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) [2022-03-01 17:53:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5221 transitions. [2022-03-01 17:53:51,776 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5221 transitions. Word has length 24 [2022-03-01 17:53:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:51,776 INFO L470 AbstractCegarLoop]: Abstraction has 1557 states and 5221 transitions. [2022-03-01 17:53:51,776 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) [2022-03-01 17:53:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5221 transitions. [2022-03-01 17:53:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:51,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:51,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:51,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-01 17:53:51,978 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 [2022-03-01 17:53:51,978 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:51,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1429097984, now seen corresponding path program 3 times [2022-03-01 17:53:51,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:51,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532017082] [2022-03-01 17:53:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:51,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:52,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:52,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532017082] [2022-03-01 17:53:52,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532017082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:52,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153330814] [2022-03-01 17:53:52,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:52,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:52,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:52,217 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:52,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 17:53:52,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:53:52,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:52,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:53:52,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:52,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:52,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:52,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:53:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:52,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:53,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:53,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:53,104 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 [2022-03-01 17:53:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:53,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153330814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:53,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:53,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:53:53,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007234026] [2022-03-01 17:53:53,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:53,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:53:53,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:53,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:53:53,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:53:53,209 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) [2022-03-01 17:53:55,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:55,693 INFO L93 Difference]: Finished difference Result 2310 states and 7511 transitions. [2022-03-01 17:53:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:53:55,693 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 [2022-03-01 17:53:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:55,697 INFO L225 Difference]: With dead ends: 2310 [2022-03-01 17:53:55,697 INFO L226 Difference]: Without dead ends: 2298 [2022-03-01 17:53:55,697 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 [2022-03-01 17:53:55,697 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 [2022-03-01 17:53:55,697 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] [2022-03-01 17:53:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-03-01 17:53:55,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1566. [2022-03-01 17:53:55,716 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) [2022-03-01 17:53:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5243 transitions. [2022-03-01 17:53:55,719 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5243 transitions. Word has length 24 [2022-03-01 17:53:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:55,719 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 5243 transitions. [2022-03-01 17:53:55,720 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) [2022-03-01 17:53:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5243 transitions. [2022-03-01 17:53:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:55,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:55,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:55,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:55,943 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 [2022-03-01 17:53:55,944 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash -976071078, now seen corresponding path program 4 times [2022-03-01 17:53:55,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:55,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942303333] [2022-03-01 17:53:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:56,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:56,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942303333] [2022-03-01 17:53:56,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942303333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:56,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250591271] [2022-03-01 17:53:56,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:56,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:56,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:56,184 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:56,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 17:53:56,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:56,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:56,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:56,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:56,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:56,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:56,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:56,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:56,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:53:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:56,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:56,761 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:53:56,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:56,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:56,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:56,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:56,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:56,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:53:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:56,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250591271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:56,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:56,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:53:56,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765463541] [2022-03-01 17:53:56,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:56,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:53:56,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:53:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:53:56,840 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) [2022-03-01 17:53:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:58,083 INFO L93 Difference]: Finished difference Result 2263 states and 7642 transitions. [2022-03-01 17:53:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:53:58,083 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 [2022-03-01 17:53:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:58,087 INFO L225 Difference]: With dead ends: 2263 [2022-03-01 17:53:58,087 INFO L226 Difference]: Without dead ends: 2256 [2022-03-01 17:53:58,088 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 [2022-03-01 17:53:58,088 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 [2022-03-01 17:53:58,088 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] [2022-03-01 17:53:58,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-01 17:53:58,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1559. [2022-03-01 17:53:58,119 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) [2022-03-01 17:53:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 5232 transitions. [2022-03-01 17:53:58,122 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 5232 transitions. Word has length 24 [2022-03-01 17:53:58,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:58,122 INFO L470 AbstractCegarLoop]: Abstraction has 1559 states and 5232 transitions. [2022-03-01 17:53:58,122 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) [2022-03-01 17:53:58,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 5232 transitions. [2022-03-01 17:53:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:58,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:58,124 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:58,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:58,324 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 [2022-03-01 17:53:58,325 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:53:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:58,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1659655765, now seen corresponding path program 70 times [2022-03-01 17:53:58,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:58,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751160849] [2022-03-01 17:53:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:58,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:58,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:58,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751160849] [2022-03-01 17:53:58,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751160849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:58,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770735840] [2022-03-01 17:53:58,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:58,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:58,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:58,616 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:58,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 17:53:58,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:58,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:58,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:53:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:58,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:58,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:58,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:58,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:58,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:53:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:58,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:59,215 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:53:59,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:53:59,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:59,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:59,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:59,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:59,272 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 [2022-03-01 17:53:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:59,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770735840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:59,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:59,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:53:59,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822264488] [2022-03-01 17:53:59,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:59,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:53:59,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:59,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:53:59,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:53:59,289 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) [2022-03-01 17:54:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:00,556 INFO L93 Difference]: Finished difference Result 2081 states and 6948 transitions. [2022-03-01 17:54:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:54:00,557 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 [2022-03-01 17:54:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:00,560 INFO L225 Difference]: With dead ends: 2081 [2022-03-01 17:54:00,560 INFO L226 Difference]: Without dead ends: 2074 [2022-03-01 17:54:00,560 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 [2022-03-01 17:54:00,560 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 [2022-03-01 17:54:00,561 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] [2022-03-01 17:54:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2022-03-01 17:54:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1560. [2022-03-01 17:54:00,578 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) [2022-03-01 17:54:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5238 transitions. [2022-03-01 17:54:00,581 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5238 transitions. Word has length 24 [2022-03-01 17:54:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:00,581 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 5238 transitions. [2022-03-01 17:54:00,581 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) [2022-03-01 17:54:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5238 transitions. [2022-03-01 17:54:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:00,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:00,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:00,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:00,783 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 [2022-03-01 17:54:00,784 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:00,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:00,784 INFO L85 PathProgramCache]: Analyzing trace with hash 579147905, now seen corresponding path program 71 times [2022-03-01 17:54:00,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:00,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981655548] [2022-03-01 17:54:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:00,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:01,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:01,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981655548] [2022-03-01 17:54:01,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981655548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:01,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303782015] [2022-03-01 17:54:01,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:01,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:01,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:01,031 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:01,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 17:54:01,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:01,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:01,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:01,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:01,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:01,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:01,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:01,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:01,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:01,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:01,605 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:54:01,606 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:54:01,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:01,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:01,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:01,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:01,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:01,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303782015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:01,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:01,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:54:01,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805419341] [2022-03-01 17:54:01,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:01,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:01,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:01,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:01,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:01,681 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) [2022-03-01 17:54:03,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:03,300 INFO L93 Difference]: Finished difference Result 2500 states and 8502 transitions. [2022-03-01 17:54:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:54:03,300 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 [2022-03-01 17:54:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:03,305 INFO L225 Difference]: With dead ends: 2500 [2022-03-01 17:54:03,305 INFO L226 Difference]: Without dead ends: 2490 [2022-03-01 17:54:03,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:54:03,305 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 [2022-03-01 17:54:03,305 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] [2022-03-01 17:54:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2022-03-01 17:54:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1558. [2022-03-01 17:54:03,326 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) [2022-03-01 17:54:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5222 transitions. [2022-03-01 17:54:03,328 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5222 transitions. Word has length 24 [2022-03-01 17:54:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:03,329 INFO L470 AbstractCegarLoop]: Abstraction has 1558 states and 5222 transitions. [2022-03-01 17:54:03,329 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) [2022-03-01 17:54:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5222 transitions. [2022-03-01 17:54:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:03,331 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:03,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:03,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-01 17:54:03,533 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 [2022-03-01 17:54:03,533 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1192444841, now seen corresponding path program 72 times [2022-03-01 17:54:03,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:03,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617243519] [2022-03-01 17:54:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:03,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:03,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:03,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617243519] [2022-03-01 17:54:03,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617243519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:03,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78918051] [2022-03-01 17:54:03,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:03,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:03,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:03,752 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:03,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 17:54:03,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:54:03,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:54:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:04,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:04,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:04,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:04,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:04,299 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 [2022-03-01 17:54:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:04,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:05,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:05,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:05,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:05,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:05,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78918051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:05,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:05,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 17:54:05,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968701267] [2022-03-01 17:54:05,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:05,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:05,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:05,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:05,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:05,131 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) [2022-03-01 17:54:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:06,637 INFO L93 Difference]: Finished difference Result 2404 states and 7972 transitions. [2022-03-01 17:54:06,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:54:06,637 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 [2022-03-01 17:54:06,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:06,642 INFO L225 Difference]: With dead ends: 2404 [2022-03-01 17:54:06,642 INFO L226 Difference]: Without dead ends: 2394 [2022-03-01 17:54:06,642 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 [2022-03-01 17:54:06,642 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 [2022-03-01 17:54:06,643 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] [2022-03-01 17:54:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2022-03-01 17:54:06,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 1577. [2022-03-01 17:54:06,663 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) [2022-03-01 17:54:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 5280 transitions. [2022-03-01 17:54:06,666 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 5280 transitions. Word has length 24 [2022-03-01 17:54:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:06,667 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 5280 transitions. [2022-03-01 17:54:06,667 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) [2022-03-01 17:54:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 5280 transitions. [2022-03-01 17:54:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:06,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:06,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:06,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:06,870 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 [2022-03-01 17:54:06,870 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:06,871 INFO L85 PathProgramCache]: Analyzing trace with hash -604506518, now seen corresponding path program 10 times [2022-03-01 17:54:06,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:06,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233608339] [2022-03-01 17:54:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:06,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:07,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:07,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233608339] [2022-03-01 17:54:07,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233608339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:07,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932378217] [2022-03-01 17:54:07,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:07,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:07,104 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:07,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 17:54:07,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:07,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:07,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:07,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:07,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:07,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:07,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:07,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:07,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:07,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:07,717 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:54:07,717 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 [2022-03-01 17:54:07,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:07,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:07,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:07,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:07,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:07,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932378217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:07,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:07,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:54:07,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596834844] [2022-03-01 17:54:07,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:07,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:54:07,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:54:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:54:07,783 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) [2022-03-01 17:54:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:09,831 INFO L93 Difference]: Finished difference Result 2733 states and 9077 transitions. [2022-03-01 17:54:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:54:09,832 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 [2022-03-01 17:54:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:09,837 INFO L225 Difference]: With dead ends: 2733 [2022-03-01 17:54:09,837 INFO L226 Difference]: Without dead ends: 2726 [2022-03-01 17:54:09,837 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 [2022-03-01 17:54:09,837 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:09,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 207 Invalid, 3949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2607 Invalid, 0 Unknown, 1306 Unchecked, 1.0s Time] [2022-03-01 17:54:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2022-03-01 17:54:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1484. [2022-03-01 17:54:09,859 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) [2022-03-01 17:54:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 5028 transitions. [2022-03-01 17:54:09,862 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 5028 transitions. Word has length 24 [2022-03-01 17:54:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:09,862 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 5028 transitions. [2022-03-01 17:54:09,862 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) [2022-03-01 17:54:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 5028 transitions. [2022-03-01 17:54:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:09,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:09,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:09,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-01 17:54:10,082 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 [2022-03-01 17:54:10,082 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:10,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:10,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1535362685, now seen corresponding path program 73 times [2022-03-01 17:54:10,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:10,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295974002] [2022-03-01 17:54:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:10,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:10,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:10,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295974002] [2022-03-01 17:54:10,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295974002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:10,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059783498] [2022-03-01 17:54:10,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:10,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:10,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:10,321 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:10,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 17:54:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:10,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:10,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:10,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:10,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:10,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:10,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:10,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:10,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:10,902 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:54:10,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:54:10,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:10,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:10,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:10,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:10,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:10,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059783498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:10,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:10,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:54:10,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034311718] [2022-03-01 17:54:10,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:10,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:10,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:10,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:10,972 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) [2022-03-01 17:54:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:14,570 INFO L93 Difference]: Finished difference Result 4104 states and 14266 transitions. [2022-03-01 17:54:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-01 17:54:14,570 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 [2022-03-01 17:54:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:14,578 INFO L225 Difference]: With dead ends: 4104 [2022-03-01 17:54:14,578 INFO L226 Difference]: Without dead ends: 4097 [2022-03-01 17:54:14,578 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 [2022-03-01 17:54:14,579 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 [2022-03-01 17:54:14,579 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] [2022-03-01 17:54:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2022-03-01 17:54:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 1460. [2022-03-01 17:54:14,622 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) [2022-03-01 17:54:14,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4950 transitions. [2022-03-01 17:54:14,626 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4950 transitions. Word has length 24 [2022-03-01 17:54:14,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:14,626 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 4950 transitions. [2022-03-01 17:54:14,626 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) [2022-03-01 17:54:14,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4950 transitions. [2022-03-01 17:54:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:14,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:14,628 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] [2022-03-01 17:54:14,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-01 17:54:14,843 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 [2022-03-01 17:54:14,843 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:14,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:14,844 INFO L85 PathProgramCache]: Analyzing trace with hash -521330513, now seen corresponding path program 74 times [2022-03-01 17:54:14,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:14,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038685148] [2022-03-01 17:54:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:14,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:15,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:15,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038685148] [2022-03-01 17:54:15,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038685148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:15,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560398341] [2022-03-01 17:54:15,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:15,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:15,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:15,083 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:15,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 17:54:15,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:15,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:15,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:54:15,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:15,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:15,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:15,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:15,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:15,422 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-01 17:54:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:15,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:16,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:16,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:16,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:16,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:54:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:16,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560398341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:16,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:16,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:54:16,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911626056] [2022-03-01 17:54:16,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:16,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:54:16,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:54:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:54:16,245 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) [2022-03-01 17:54:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:18,505 INFO L93 Difference]: Finished difference Result 3094 states and 11094 transitions. [2022-03-01 17:54:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 17:54:18,506 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 [2022-03-01 17:54:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:18,523 INFO L225 Difference]: With dead ends: 3094 [2022-03-01 17:54:18,523 INFO L226 Difference]: Without dead ends: 3084 [2022-03-01 17:54:18,524 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 [2022-03-01 17:54:18,524 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 [2022-03-01 17:54:18,524 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] [2022-03-01 17:54:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2022-03-01 17:54:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1504. [2022-03-01 17:54:18,546 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) [2022-03-01 17:54:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5126 transitions. [2022-03-01 17:54:18,549 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5126 transitions. Word has length 24 [2022-03-01 17:54:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:18,549 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 5126 transitions. [2022-03-01 17:54:18,549 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) [2022-03-01 17:54:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5126 transitions. [2022-03-01 17:54:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:18,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:18,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:18,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-01 17:54:18,751 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 [2022-03-01 17:54:18,751 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash 792949507, now seen corresponding path program 75 times [2022-03-01 17:54:18,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:18,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253210772] [2022-03-01 17:54:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:18,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:19,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:19,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253210772] [2022-03-01 17:54:19,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253210772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:19,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814833117] [2022-03-01 17:54:19,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:19,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:19,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:19,044 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:19,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 17:54:19,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:54:19,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:19,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:54:19,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:19,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:19,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:19,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:19,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:19,380 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-01 17:54:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:19,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:20,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:20,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:20,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:20,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:54:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:20,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814833117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:20,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:20,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:54:20,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245522500] [2022-03-01 17:54:20,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:20,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:54:20,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:20,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:54:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:54:20,237 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) [2022-03-01 17:54:23,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:23,380 INFO L93 Difference]: Finished difference Result 3055 states and 10444 transitions. [2022-03-01 17:54:23,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 17:54:23,380 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 [2022-03-01 17:54:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:23,385 INFO L225 Difference]: With dead ends: 3055 [2022-03-01 17:54:23,385 INFO L226 Difference]: Without dead ends: 3042 [2022-03-01 17:54:23,386 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 [2022-03-01 17:54:23,386 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 [2022-03-01 17:54:23,386 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] [2022-03-01 17:54:23,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2022-03-01 17:54:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1552. [2022-03-01 17:54:23,410 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) [2022-03-01 17:54:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5299 transitions. [2022-03-01 17:54:23,413 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5299 transitions. Word has length 24 [2022-03-01 17:54:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:23,413 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5299 transitions. [2022-03-01 17:54:23,413 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) [2022-03-01 17:54:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5299 transitions. [2022-03-01 17:54:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:23,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:23,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:23,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-01 17:54:23,615 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 [2022-03-01 17:54:23,616 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash -239064859, now seen corresponding path program 76 times [2022-03-01 17:54:23,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:23,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238736151] [2022-03-01 17:54:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:23,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:23,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:23,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238736151] [2022-03-01 17:54:23,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238736151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:23,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290617071] [2022-03-01 17:54:23,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:23,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:23,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:23,874 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:23,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-01 17:54:23,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:23,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:23,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:23,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:24,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:24,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:24,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:24,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:24,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:24,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:24,457 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:54:24,458 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 [2022-03-01 17:54:24,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:24,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:24,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:24,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:24,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:54:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:24,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290617071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:24,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:24,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:54:24,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163945885] [2022-03-01 17:54:24,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:24,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:24,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:24,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:24,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:24,531 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) [2022-03-01 17:54:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:26,953 INFO L93 Difference]: Finished difference Result 3034 states and 10291 transitions. [2022-03-01 17:54:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:54:26,954 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 [2022-03-01 17:54:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:26,959 INFO L225 Difference]: With dead ends: 3034 [2022-03-01 17:54:26,959 INFO L226 Difference]: Without dead ends: 3026 [2022-03-01 17:54:26,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 17:54:26,960 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 [2022-03-01 17:54:26,960 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] [2022-03-01 17:54:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2022-03-01 17:54:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 1563. [2022-03-01 17:54:26,993 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) [2022-03-01 17:54:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5336 transitions. [2022-03-01 17:54:26,996 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5336 transitions. Word has length 24 [2022-03-01 17:54:26,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:26,996 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 5336 transitions. [2022-03-01 17:54:26,997 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) [2022-03-01 17:54:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5336 transitions. [2022-03-01 17:54:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:26,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:26,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:27,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-01 17:54:27,199 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 [2022-03-01 17:54:27,199 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash -5292699, now seen corresponding path program 77 times [2022-03-01 17:54:27,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:27,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758813236] [2022-03-01 17:54:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:27,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:27,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:27,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758813236] [2022-03-01 17:54:27,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758813236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:27,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556599564] [2022-03-01 17:54:27,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:27,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:27,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:27,437 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:27,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-01 17:54:27,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:27,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:27,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:27,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:27,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:27,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:27,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:27,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:28,016 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:54:28,016 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 [2022-03-01 17:54:28,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:28,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:28,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:28,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:28,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:28,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556599564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:28,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:28,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:54:28,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689745723] [2022-03-01 17:54:28,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:28,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:28,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:28,082 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) [2022-03-01 17:54:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:29,816 INFO L93 Difference]: Finished difference Result 2326 states and 7964 transitions. [2022-03-01 17:54:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:54:29,817 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 [2022-03-01 17:54:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:29,820 INFO L225 Difference]: With dead ends: 2326 [2022-03-01 17:54:29,820 INFO L226 Difference]: Without dead ends: 2318 [2022-03-01 17:54:29,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:54:29,821 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 [2022-03-01 17:54:29,821 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] [2022-03-01 17:54:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2022-03-01 17:54:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1564. [2022-03-01 17:54:29,839 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) [2022-03-01 17:54:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5342 transitions. [2022-03-01 17:54:29,842 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5342 transitions. Word has length 24 [2022-03-01 17:54:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:29,842 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 5342 transitions. [2022-03-01 17:54:29,842 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) [2022-03-01 17:54:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5342 transitions. [2022-03-01 17:54:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:29,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:29,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:29,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-01 17:54:30,045 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 [2022-03-01 17:54:30,046 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:30,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:30,046 INFO L85 PathProgramCache]: Analyzing trace with hash -109982140, now seen corresponding path program 5 times [2022-03-01 17:54:30,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:30,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702784688] [2022-03-01 17:54:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:30,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:30,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:30,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702784688] [2022-03-01 17:54:30,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702784688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:30,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629711909] [2022-03-01 17:54:30,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:30,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:30,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:30,320 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:30,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-01 17:54:30,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:30,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:30,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:30,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:30,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:30,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:30,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:30,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:30,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:30,898 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:54:30,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:54:30,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:30,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:30,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:30,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:30,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:30,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629711909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:30,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:30,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:54:30,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311043731] [2022-03-01 17:54:30,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:30,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:30,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:30,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:30,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:30,967 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) [2022-03-01 17:54:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:34,170 INFO L93 Difference]: Finished difference Result 3582 states and 12461 transitions. [2022-03-01 17:54:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 17:54:34,171 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 [2022-03-01 17:54:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:34,177 INFO L225 Difference]: With dead ends: 3582 [2022-03-01 17:54:34,177 INFO L226 Difference]: Without dead ends: 3574 [2022-03-01 17:54:34,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=697, Invalid=5003, Unknown=0, NotChecked=0, Total=5700 [2022-03-01 17:54:34,177 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 [2022-03-01 17:54:34,178 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] [2022-03-01 17:54:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2022-03-01 17:54:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 1543. [2022-03-01 17:54:34,204 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) [2022-03-01 17:54:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 5268 transitions. [2022-03-01 17:54:34,207 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 5268 transitions. Word has length 24 [2022-03-01 17:54:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:34,208 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 5268 transitions. [2022-03-01 17:54:34,208 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) [2022-03-01 17:54:34,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 5268 transitions. [2022-03-01 17:54:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:34,211 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:34,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:34,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:34,432 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 [2022-03-01 17:54:34,432 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:34,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1904300301, now seen corresponding path program 78 times [2022-03-01 17:54:34,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:34,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739518870] [2022-03-01 17:54:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:34,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:34,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:34,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739518870] [2022-03-01 17:54:34,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739518870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:34,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191308801] [2022-03-01 17:54:34,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:34,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:34,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:34,712 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:34,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-01 17:54:34,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:54:34,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:34,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:54:34,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:35,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:35,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:35,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:35,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:35,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:54:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:35,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:36,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:36,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:36,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:36,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:36,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:54:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:36,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191308801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:36,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:36,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:54:36,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804056618] [2022-03-01 17:54:36,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:36,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:36,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:36,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:36,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:36,325 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) [2022-03-01 17:54:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:37,461 INFO L93 Difference]: Finished difference Result 1958 states and 6704 transitions. [2022-03-01 17:54:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:54:37,461 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 [2022-03-01 17:54:37,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:37,465 INFO L225 Difference]: With dead ends: 1958 [2022-03-01 17:54:37,465 INFO L226 Difference]: Without dead ends: 1952 [2022-03-01 17:54:37,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=378, Invalid=2274, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:54:37,465 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 [2022-03-01 17:54:37,465 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] [2022-03-01 17:54:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2022-03-01 17:54:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1625. [2022-03-01 17:54:37,485 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) [2022-03-01 17:54:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5609 transitions. [2022-03-01 17:54:37,488 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5609 transitions. Word has length 24 [2022-03-01 17:54:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:37,489 INFO L470 AbstractCegarLoop]: Abstraction has 1625 states and 5609 transitions. [2022-03-01 17:54:37,489 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) [2022-03-01 17:54:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5609 transitions. [2022-03-01 17:54:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:37,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:37,491 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] [2022-03-01 17:54:37,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:37,691 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 [2022-03-01 17:54:37,691 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:37,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1475585507, now seen corresponding path program 79 times [2022-03-01 17:54:37,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:37,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823189357] [2022-03-01 17:54:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:37,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:37,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:37,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823189357] [2022-03-01 17:54:37,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823189357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:37,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908570845] [2022-03-01 17:54:37,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:37,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:37,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:37,938 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:37,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-01 17:54:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:37,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:37,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:38,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:38,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:38,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:38,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:38,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:38,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:38,530 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:54:38,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:54:38,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:38,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:38,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:38,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:38,580 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 20 treesize of output 3 [2022-03-01 17:54:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:38,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908570845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:38,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:38,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:54:38,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325247901] [2022-03-01 17:54:38,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:38,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:38,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:38,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:38,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:38,597 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) [2022-03-01 17:54:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:41,578 INFO L93 Difference]: Finished difference Result 3914 states and 13821 transitions. [2022-03-01 17:54:41,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:54:41,578 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 [2022-03-01 17:54:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:41,585 INFO L225 Difference]: With dead ends: 3914 [2022-03-01 17:54:41,585 INFO L226 Difference]: Without dead ends: 3907 [2022-03-01 17:54:41,585 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 [2022-03-01 17:54:41,585 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 [2022-03-01 17:54:41,585 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] [2022-03-01 17:54:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-03-01 17:54:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 1562. [2022-03-01 17:54:41,614 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) [2022-03-01 17:54:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5343 transitions. [2022-03-01 17:54:41,617 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5343 transitions. Word has length 24 [2022-03-01 17:54:41,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:41,617 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 5343 transitions. [2022-03-01 17:54:41,617 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) [2022-03-01 17:54:41,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5343 transitions. [2022-03-01 17:54:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:41,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:41,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:41,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-01 17:54:41,820 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 [2022-03-01 17:54:41,820 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:41,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1011927326, now seen corresponding path program 11 times [2022-03-01 17:54:41,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:41,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023482054] [2022-03-01 17:54:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:41,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:42,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:42,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023482054] [2022-03-01 17:54:42,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023482054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:42,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307123427] [2022-03-01 17:54:42,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:42,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:42,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:42,056 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:42,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-01 17:54:42,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:42,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:42,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:42,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:42,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:42,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:42,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:42,385 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 37 treesize of output 21 [2022-03-01 17:54:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:42,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:42,679 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:54:42,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:54:42,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:42,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:42,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:54:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:42,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307123427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:42,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:42,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:54:42,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470176128] [2022-03-01 17:54:42,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:42,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:54:42,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:54:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:54:42,752 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) [2022-03-01 17:54:44,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:44,423 INFO L93 Difference]: Finished difference Result 2864 states and 10083 transitions. [2022-03-01 17:54:44,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:54:44,424 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 [2022-03-01 17:54:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:44,429 INFO L225 Difference]: With dead ends: 2864 [2022-03-01 17:54:44,429 INFO L226 Difference]: Without dead ends: 2860 [2022-03-01 17:54:44,429 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 [2022-03-01 17:54:44,430 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 [2022-03-01 17:54:44,430 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] [2022-03-01 17:54:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2022-03-01 17:54:44,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1483. [2022-03-01 17:54:44,452 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) [2022-03-01 17:54:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 5027 transitions. [2022-03-01 17:54:44,455 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 5027 transitions. Word has length 24 [2022-03-01 17:54:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:44,455 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 5027 transitions. [2022-03-01 17:54:44,455 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) [2022-03-01 17:54:44,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 5027 transitions. [2022-03-01 17:54:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:44,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:44,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:44,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:44,657 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 [2022-03-01 17:54:44,658 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:44,658 INFO L85 PathProgramCache]: Analyzing trace with hash 50753249, now seen corresponding path program 80 times [2022-03-01 17:54:44,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:44,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933332565] [2022-03-01 17:54:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:44,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:44,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:44,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933332565] [2022-03-01 17:54:44,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933332565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:44,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402342609] [2022-03-01 17:54:44,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:44,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:44,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:44,886 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:44,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-01 17:54:44,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:44,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:44,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:54:44,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:45,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:45,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:45,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:45,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:45,382 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 33 treesize of output 21 [2022-03-01 17:54:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:45,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:45,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:45,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:45,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:54:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:45,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402342609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:45,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:45,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-01 17:54:45,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981165463] [2022-03-01 17:54:45,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:45,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:45,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:45,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:45,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:45,945 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) [2022-03-01 17:54:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:47,332 INFO L93 Difference]: Finished difference Result 2603 states and 8217 transitions. [2022-03-01 17:54:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:54:47,332 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 [2022-03-01 17:54:47,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:47,337 INFO L225 Difference]: With dead ends: 2603 [2022-03-01 17:54:47,337 INFO L226 Difference]: Without dead ends: 2591 [2022-03-01 17:54:47,337 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 [2022-03-01 17:54:47,337 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:47,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 366 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1309 Invalid, 0 Unknown, 703 Unchecked, 0.6s Time] [2022-03-01 17:54:47,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-03-01 17:54:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1556. [2022-03-01 17:54:47,360 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) [2022-03-01 17:54:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5206 transitions. [2022-03-01 17:54:47,363 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5206 transitions. Word has length 24 [2022-03-01 17:54:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:47,363 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 5206 transitions. [2022-03-01 17:54:47,363 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) [2022-03-01 17:54:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5206 transitions. [2022-03-01 17:54:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:47,372 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:47,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:47,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:47,573 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 [2022-03-01 17:54:47,573 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:47,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2103294839, now seen corresponding path program 81 times [2022-03-01 17:54:47,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:47,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450177369] [2022-03-01 17:54:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:47,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:47,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:47,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450177369] [2022-03-01 17:54:47,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450177369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:47,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155937461] [2022-03-01 17:54:47,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:47,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:47,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:47,818 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:47,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-01 17:54:47,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:54:47,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:47,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:54:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:48,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:48,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:48,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:48,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:48,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:48,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:48,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:48,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:48,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:54:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:48,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155937461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:48,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:48,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-01 17:54:48,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578357014] [2022-03-01 17:54:48,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:48,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:48,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:48,884 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) [2022-03-01 17:54:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:49,637 INFO L93 Difference]: Finished difference Result 2391 states and 7715 transitions. [2022-03-01 17:54:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:54:49,638 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 [2022-03-01 17:54:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:49,642 INFO L225 Difference]: With dead ends: 2391 [2022-03-01 17:54:49,642 INFO L226 Difference]: Without dead ends: 2380 [2022-03-01 17:54:49,642 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 [2022-03-01 17:54:49,642 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 169 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-01 17:54:49,642 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] [2022-03-01 17:54:49,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2022-03-01 17:54:49,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1604. [2022-03-01 17:54:49,661 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) [2022-03-01 17:54:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 5315 transitions. [2022-03-01 17:54:49,664 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 5315 transitions. Word has length 24 [2022-03-01 17:54:49,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:49,664 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 5315 transitions. [2022-03-01 17:54:49,665 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) [2022-03-01 17:54:49,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 5315 transitions. [2022-03-01 17:54:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:49,674 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:49,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:49,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:49,874 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 [2022-03-01 17:54:49,874 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash 927226883, now seen corresponding path program 82 times [2022-03-01 17:54:49,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:49,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130411708] [2022-03-01 17:54:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:49,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:50,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:50,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130411708] [2022-03-01 17:54:50,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130411708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:50,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732916021] [2022-03-01 17:54:50,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:50,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:50,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:50,093 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:50,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-01 17:54:50,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:50,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:50,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:50,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:50,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:50,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:50,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:50,683 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:54:50,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:54:50,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:50,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:50,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:54:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:50,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732916021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:50,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:50,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:54:50,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981386141] [2022-03-01 17:54:50,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:50,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:54:50,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:50,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:54:50,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:54:50,752 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) [2022-03-01 17:54:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:52,287 INFO L93 Difference]: Finished difference Result 2451 states and 7860 transitions. [2022-03-01 17:54:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:54:52,287 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 [2022-03-01 17:54:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:52,291 INFO L225 Difference]: With dead ends: 2451 [2022-03-01 17:54:52,291 INFO L226 Difference]: Without dead ends: 2444 [2022-03-01 17:54:52,292 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 [2022-03-01 17:54:52,292 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 [2022-03-01 17:54:52,292 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] [2022-03-01 17:54:52,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-03-01 17:54:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1555. [2022-03-01 17:54:52,312 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) [2022-03-01 17:54:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 5202 transitions. [2022-03-01 17:54:52,315 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 5202 transitions. Word has length 24 [2022-03-01 17:54:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:52,315 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 5202 transitions. [2022-03-01 17:54:52,315 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) [2022-03-01 17:54:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 5202 transitions. [2022-03-01 17:54:52,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:52,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:52,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:52,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-01 17:54:52,519 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 [2022-03-01 17:54:52,519 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash -295155111, now seen corresponding path program 83 times [2022-03-01 17:54:52,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:52,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456023668] [2022-03-01 17:54:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:52,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:52,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:52,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456023668] [2022-03-01 17:54:52,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456023668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:52,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507077815] [2022-03-01 17:54:52,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:52,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:52,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:52,741 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:52,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-01 17:54:52,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:54:52,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:52,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:52,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:53,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:53,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:53,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:53,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:54:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:53,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:53,362 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:54:53,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:54:53,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:53,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:53,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:53,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:53,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:54:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:53,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507077815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:53,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:53,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:54:53,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482303868] [2022-03-01 17:54:53,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:53,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:54:53,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:53,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:54:53,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:54:53,428 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) [2022-03-01 17:54:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:54,762 INFO L93 Difference]: Finished difference Result 2045 states and 6666 transitions. [2022-03-01 17:54:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:54:54,762 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 [2022-03-01 17:54:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:54,766 INFO L225 Difference]: With dead ends: 2045 [2022-03-01 17:54:54,766 INFO L226 Difference]: Without dead ends: 2038 [2022-03-01 17:54:54,766 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 [2022-03-01 17:54:54,767 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 [2022-03-01 17:54:54,767 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] [2022-03-01 17:54:54,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2022-03-01 17:54:54,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1566. [2022-03-01 17:54:54,785 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) [2022-03-01 17:54:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5228 transitions. [2022-03-01 17:54:54,788 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5228 transitions. Word has length 24 [2022-03-01 17:54:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:54,788 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 5228 transitions. [2022-03-01 17:54:54,788 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) [2022-03-01 17:54:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5228 transitions. [2022-03-01 17:54:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:54,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:54,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:54,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-01 17:54:54,991 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 [2022-03-01 17:54:54,991 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:54,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1559600685, now seen corresponding path program 84 times [2022-03-01 17:54:54,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:54,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405072193] [2022-03-01 17:54:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:54,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:55,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:55,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405072193] [2022-03-01 17:54:55,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405072193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:55,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981794601] [2022-03-01 17:54:55,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:55,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:55,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:55,221 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:55,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-01 17:54:55,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:54:55,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:55,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:54:55,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:55,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:55,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:55,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:55,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:55,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:54:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:55,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:56,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:56,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:56,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:56,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:56,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:54:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:56,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981794601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:56,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:56,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 17:54:56,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715247861] [2022-03-01 17:54:56,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:56,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:56,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:56,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:56,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:56,410 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) [2022-03-01 17:54:59,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:59,294 INFO L93 Difference]: Finished difference Result 2641 states and 8716 transitions. [2022-03-01 17:54:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-01 17:54:59,295 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 [2022-03-01 17:54:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:59,299 INFO L225 Difference]: With dead ends: 2641 [2022-03-01 17:54:59,299 INFO L226 Difference]: Without dead ends: 2637 [2022-03-01 17:54:59,299 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 [2022-03-01 17:54:59,299 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 [2022-03-01 17:54:59,300 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] [2022-03-01 17:54:59,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2022-03-01 17:54:59,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1591. [2022-03-01 17:54:59,321 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) [2022-03-01 17:54:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5291 transitions. [2022-03-01 17:54:59,323 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5291 transitions. Word has length 24 [2022-03-01 17:54:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:59,324 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 5291 transitions. [2022-03-01 17:54:59,324 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) [2022-03-01 17:54:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5291 transitions. [2022-03-01 17:54:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:54:59,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:59,326 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] [2022-03-01 17:54:59,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-01 17:54:59,526 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 [2022-03-01 17:54:59,526 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:54:59,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:59,527 INFO L85 PathProgramCache]: Analyzing trace with hash 938415252, now seen corresponding path program 12 times [2022-03-01 17:54:59,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:59,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277992038] [2022-03-01 17:54:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:59,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:59,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:59,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277992038] [2022-03-01 17:54:59,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277992038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:59,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032444769] [2022-03-01 17:54:59,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:59,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:59,742 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:59,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-01 17:54:59,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:54:59,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:54:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:00,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:00,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:00,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:00,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:00,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:55:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:00,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:00,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:00,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:00,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:00,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:00,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:00,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032444769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:00,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:00,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 17:55:00,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487977996] [2022-03-01 17:55:00,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:00,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:55:00,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:00,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:55:00,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:55:00,941 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) [2022-03-01 17:55:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:05,136 INFO L93 Difference]: Finished difference Result 3196 states and 10645 transitions. [2022-03-01 17:55:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-01 17:55:05,136 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 [2022-03-01 17:55:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:05,142 INFO L225 Difference]: With dead ends: 3196 [2022-03-01 17:55:05,142 INFO L226 Difference]: Without dead ends: 3192 [2022-03-01 17:55:05,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3439 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1267, Invalid=9239, Unknown=0, NotChecked=0, Total=10506 [2022-03-01 17:55:05,143 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 [2022-03-01 17:55:05,143 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] [2022-03-01 17:55:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2022-03-01 17:55:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 1614. [2022-03-01 17:55:05,167 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) [2022-03-01 17:55:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5349 transitions. [2022-03-01 17:55:05,171 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5349 transitions. Word has length 24 [2022-03-01 17:55:05,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:05,171 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 5349 transitions. [2022-03-01 17:55:05,171 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) [2022-03-01 17:55:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5349 transitions. [2022-03-01 17:55:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:05,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:05,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:05,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-01 17:55:05,373 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 [2022-03-01 17:55:05,373 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:05,374 INFO L85 PathProgramCache]: Analyzing trace with hash 893357365, now seen corresponding path program 85 times [2022-03-01 17:55:05,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:05,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544769902] [2022-03-01 17:55:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:05,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:05,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:05,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544769902] [2022-03-01 17:55:05,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544769902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:05,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125803390] [2022-03-01 17:55:05,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:05,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:05,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:05,597 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:05,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-01 17:55:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:05,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:05,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:05,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:05,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:05,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:05,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:55:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:05,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:06,174 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:55:06,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:55:06,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:06,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:06,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:06,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:55:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:06,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125803390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:06,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:06,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:06,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232495361] [2022-03-01 17:55:06,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:06,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:06,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:06,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:06,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:06,236 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) [2022-03-01 17:55:07,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:07,008 INFO L93 Difference]: Finished difference Result 2011 states and 6574 transitions. [2022-03-01 17:55:07,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:55:07,008 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 [2022-03-01 17:55:07,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:07,013 INFO L225 Difference]: With dead ends: 2011 [2022-03-01 17:55:07,013 INFO L226 Difference]: Without dead ends: 2005 [2022-03-01 17:55:07,013 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 [2022-03-01 17:55:07,013 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 [2022-03-01 17:55:07,013 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] [2022-03-01 17:55:07,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2022-03-01 17:55:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1605. [2022-03-01 17:55:07,038 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) [2022-03-01 17:55:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5328 transitions. [2022-03-01 17:55:07,043 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5328 transitions. Word has length 24 [2022-03-01 17:55:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:07,044 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 5328 transitions. [2022-03-01 17:55:07,044 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) [2022-03-01 17:55:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5328 transitions. [2022-03-01 17:55:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:07,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:07,047 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] [2022-03-01 17:55:07,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:07,267 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 [2022-03-01 17:55:07,267 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash -761953865, now seen corresponding path program 86 times [2022-03-01 17:55:07,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:07,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70633589] [2022-03-01 17:55:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:07,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:07,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70633589] [2022-03-01 17:55:07,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70633589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:07,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223624969] [2022-03-01 17:55:07,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:07,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:07,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:07,498 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:07,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-01 17:55:07,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:07,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:07,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:55:07,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:07,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:07,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:07,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:07,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:07,839 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:55:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:08,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:08,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:08,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:08,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:08,509 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 [2022-03-01 17:55:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:08,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223624969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:08,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:08,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:55:08,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775655404] [2022-03-01 17:55:08,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:08,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:55:08,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:55:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:55:08,623 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) [2022-03-01 17:55:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:09,445 INFO L93 Difference]: Finished difference Result 3053 states and 10320 transitions. [2022-03-01 17:55:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:55:09,445 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 [2022-03-01 17:55:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:09,451 INFO L225 Difference]: With dead ends: 3053 [2022-03-01 17:55:09,451 INFO L226 Difference]: Without dead ends: 3044 [2022-03-01 17:55:09,451 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 [2022-03-01 17:55:09,451 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 [2022-03-01 17:55:09,451 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] [2022-03-01 17:55:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-03-01 17:55:09,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 1643. [2022-03-01 17:55:09,475 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) [2022-03-01 17:55:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 5422 transitions. [2022-03-01 17:55:09,478 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 5422 transitions. Word has length 24 [2022-03-01 17:55:09,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:09,478 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 5422 transitions. [2022-03-01 17:55:09,478 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) [2022-03-01 17:55:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 5422 transitions. [2022-03-01 17:55:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:09,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:09,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:09,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-01 17:55:09,681 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 [2022-03-01 17:55:09,681 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:09,681 INFO L85 PathProgramCache]: Analyzing trace with hash -958467370, now seen corresponding path program 13 times [2022-03-01 17:55:09,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:09,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964561066] [2022-03-01 17:55:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:09,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:09,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:09,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964561066] [2022-03-01 17:55:09,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964561066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:09,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208265928] [2022-03-01 17:55:09,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:09,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:09,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:09,905 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:09,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-01 17:55:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:09,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:09,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:10,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:10,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:10,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:10,225 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 33 treesize of output 17 [2022-03-01 17:55:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:10,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:10,499 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:55:10,499 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:55:10,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:10,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:10,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:10,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:10,542 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:55:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:10,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208265928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:10,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:10,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:10,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099701591] [2022-03-01 17:55:10,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:10,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:10,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:10,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:10,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:10,559 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) [2022-03-01 17:55:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:11,390 INFO L93 Difference]: Finished difference Result 2100 states and 6811 transitions. [2022-03-01 17:55:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:55:11,390 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 [2022-03-01 17:55:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:11,393 INFO L225 Difference]: With dead ends: 2100 [2022-03-01 17:55:11,393 INFO L226 Difference]: Without dead ends: 2096 [2022-03-01 17:55:11,394 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 [2022-03-01 17:55:11,394 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 [2022-03-01 17:55:11,394 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] [2022-03-01 17:55:11,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2022-03-01 17:55:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1624. [2022-03-01 17:55:11,422 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) [2022-03-01 17:55:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5374 transitions. [2022-03-01 17:55:11,424 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5374 transitions. Word has length 24 [2022-03-01 17:55:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:11,425 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 5374 transitions. [2022-03-01 17:55:11,425 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) [2022-03-01 17:55:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5374 transitions. [2022-03-01 17:55:11,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:11,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:11,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:11,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-01 17:55:11,628 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 [2022-03-01 17:55:11,628 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:11,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:11,628 INFO L85 PathProgramCache]: Analyzing trace with hash -199377759, now seen corresponding path program 87 times [2022-03-01 17:55:11,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:11,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837209543] [2022-03-01 17:55:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:11,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:11,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:11,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837209543] [2022-03-01 17:55:11,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837209543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:11,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555094513] [2022-03-01 17:55:11,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:11,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:11,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:11,863 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:11,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-01 17:55:11,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:55:11,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:11,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:11,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:12,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:12,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:12,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:12,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:12,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:12,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:12,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:12,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:12,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555094513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:12,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:12,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:55:12,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917597844] [2022-03-01 17:55:12,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:12,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:55:12,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:55:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:55:12,896 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) [2022-03-01 17:55:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:16,936 INFO L93 Difference]: Finished difference Result 2836 states and 9082 transitions. [2022-03-01 17:55:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 17:55:16,937 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 [2022-03-01 17:55:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:16,942 INFO L225 Difference]: With dead ends: 2836 [2022-03-01 17:55:16,942 INFO L226 Difference]: Without dead ends: 2804 [2022-03-01 17:55:16,942 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 [2022-03-01 17:55:16,942 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 [2022-03-01 17:55:16,942 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] [2022-03-01 17:55:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2022-03-01 17:55:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 1642. [2022-03-01 17:55:16,965 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) [2022-03-01 17:55:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5437 transitions. [2022-03-01 17:55:16,983 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5437 transitions. Word has length 24 [2022-03-01 17:55:16,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:16,983 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 5437 transitions. [2022-03-01 17:55:16,983 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) [2022-03-01 17:55:16,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5437 transitions. [2022-03-01 17:55:16,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:16,985 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:16,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:17,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-01 17:55:17,185 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 [2022-03-01 17:55:17,186 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1736865753, now seen corresponding path program 88 times [2022-03-01 17:55:17,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:17,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731078885] [2022-03-01 17:55:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:17,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:17,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:17,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731078885] [2022-03-01 17:55:17,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731078885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:17,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581571009] [2022-03-01 17:55:17,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:17,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:17,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:17,439 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:17,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-01 17:55:17,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:17,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:17,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:17,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:17,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:17,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:55:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:17,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:18,009 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:55:18,009 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:55:18,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:18,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:18,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:18,061 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 20 treesize of output 3 [2022-03-01 17:55:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:18,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581571009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:18,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:18,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:18,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409669841] [2022-03-01 17:55:18,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:18,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:18,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:18,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:18,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:18,079 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) [2022-03-01 17:55:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:19,413 INFO L93 Difference]: Finished difference Result 2119 states and 7012 transitions. [2022-03-01 17:55:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:55:19,413 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 [2022-03-01 17:55:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:19,417 INFO L225 Difference]: With dead ends: 2119 [2022-03-01 17:55:19,417 INFO L226 Difference]: Without dead ends: 2112 [2022-03-01 17:55:19,417 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 [2022-03-01 17:55:19,418 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 [2022-03-01 17:55:19,418 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] [2022-03-01 17:55:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-03-01 17:55:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1642. [2022-03-01 17:55:19,437 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) [2022-03-01 17:55:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5437 transitions. [2022-03-01 17:55:19,440 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5437 transitions. Word has length 24 [2022-03-01 17:55:19,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:19,440 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 5437 transitions. [2022-03-01 17:55:19,440 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) [2022-03-01 17:55:19,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5437 transitions. [2022-03-01 17:55:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:19,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:19,443 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] [2022-03-01 17:55:19,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-01 17:55:19,643 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 [2022-03-01 17:55:19,643 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1459870753, now seen corresponding path program 89 times [2022-03-01 17:55:19,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:19,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624150461] [2022-03-01 17:55:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:19,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:19,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:19,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624150461] [2022-03-01 17:55:19,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624150461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:19,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652035904] [2022-03-01 17:55:19,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:19,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:19,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:19,926 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:19,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-01 17:55:19,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:55:19,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:55:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:20,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:20,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:20,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:20,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:20,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2022-03-01 17:55:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:20,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:21,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:21,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:21,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:21,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:21,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:55:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:21,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652035904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:21,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:21,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:55:21,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178394107] [2022-03-01 17:55:21,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:21,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:55:21,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:21,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:55:21,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:55:21,094 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) [2022-03-01 17:55:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:21,925 INFO L93 Difference]: Finished difference Result 2348 states and 7751 transitions. [2022-03-01 17:55:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:55:21,925 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 [2022-03-01 17:55:21,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:21,929 INFO L225 Difference]: With dead ends: 2348 [2022-03-01 17:55:21,929 INFO L226 Difference]: Without dead ends: 2341 [2022-03-01 17:55:21,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:55:21,930 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 [2022-03-01 17:55:21,930 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] [2022-03-01 17:55:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-03-01 17:55:21,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 1653. [2022-03-01 17:55:21,959 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) [2022-03-01 17:55:21,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5460 transitions. [2022-03-01 17:55:21,962 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5460 transitions. Word has length 24 [2022-03-01 17:55:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:21,962 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 5460 transitions. [2022-03-01 17:55:21,962 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) [2022-03-01 17:55:21,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5460 transitions. [2022-03-01 17:55:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:21,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:21,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:21,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-01 17:55:22,165 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 [2022-03-01 17:55:22,165 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:22,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:22,165 INFO L85 PathProgramCache]: Analyzing trace with hash 988875043, now seen corresponding path program 90 times [2022-03-01 17:55:22,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:22,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636140104] [2022-03-01 17:55:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:22,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:22,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636140104] [2022-03-01 17:55:22,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636140104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:22,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311360393] [2022-03-01 17:55:22,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:22,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:22,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:22,415 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:22,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-01 17:55:22,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:55:22,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:55:22,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:22,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:22,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:22,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-01 17:55:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:22,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:23,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:23,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:23,302 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 [2022-03-01 17:55:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:23,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311360393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:23,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:23,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:55:23,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346003776] [2022-03-01 17:55:23,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:23,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:55:23,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:23,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:55:23,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:55:23,440 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) [2022-03-01 17:55:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:24,688 INFO L93 Difference]: Finished difference Result 1924 states and 6308 transitions. [2022-03-01 17:55:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:55:24,689 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 [2022-03-01 17:55:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:24,692 INFO L225 Difference]: With dead ends: 1924 [2022-03-01 17:55:24,692 INFO L226 Difference]: Without dead ends: 1918 [2022-03-01 17:55:24,692 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 [2022-03-01 17:55:24,692 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 [2022-03-01 17:55:24,692 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] [2022-03-01 17:55:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-03-01 17:55:24,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1654. [2022-03-01 17:55:24,709 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) [2022-03-01 17:55:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5462 transitions. [2022-03-01 17:55:24,712 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5462 transitions. Word has length 24 [2022-03-01 17:55:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:24,712 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 5462 transitions. [2022-03-01 17:55:24,712 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) [2022-03-01 17:55:24,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5462 transitions. [2022-03-01 17:55:24,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:24,715 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:24,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:24,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:24,915 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 [2022-03-01 17:55:24,915 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:24,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:24,915 INFO L85 PathProgramCache]: Analyzing trace with hash 626132313, now seen corresponding path program 91 times [2022-03-01 17:55:24,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:24,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180887343] [2022-03-01 17:55:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:24,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:25,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:25,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180887343] [2022-03-01 17:55:25,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180887343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:25,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227821993] [2022-03-01 17:55:25,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:25,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:25,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:25,172 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:25,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-01 17:55:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:25,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:25,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:25,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:25,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:25,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:25,395 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 30 treesize of output 16 [2022-03-01 17:55:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:25,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:25,716 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:55:25,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:25,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:25,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:25,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:25,776 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 [2022-03-01 17:55:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:25,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227821993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:25,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:25,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:25,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278500273] [2022-03-01 17:55:25,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:25,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:25,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:25,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:25,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:25,793 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) [2022-03-01 17:55:26,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:26,883 INFO L93 Difference]: Finished difference Result 1970 states and 6486 transitions. [2022-03-01 17:55:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:55:26,883 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 [2022-03-01 17:55:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:26,886 INFO L225 Difference]: With dead ends: 1970 [2022-03-01 17:55:26,886 INFO L226 Difference]: Without dead ends: 1966 [2022-03-01 17:55:26,887 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 [2022-03-01 17:55:26,887 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 [2022-03-01 17:55:26,887 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] [2022-03-01 17:55:26,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-03-01 17:55:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1662. [2022-03-01 17:55:26,905 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) [2022-03-01 17:55:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5481 transitions. [2022-03-01 17:55:26,908 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5481 transitions. Word has length 24 [2022-03-01 17:55:26,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:26,908 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 5481 transitions. [2022-03-01 17:55:26,908 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) [2022-03-01 17:55:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5481 transitions. [2022-03-01 17:55:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:26,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:26,910 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] [2022-03-01 17:55:26,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:27,111 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 [2022-03-01 17:55:27,111 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:27,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1513635994, now seen corresponding path program 14 times [2022-03-01 17:55:27,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:27,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168513802] [2022-03-01 17:55:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:27,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:27,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:27,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168513802] [2022-03-01 17:55:27,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168513802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:27,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662926842] [2022-03-01 17:55:27,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:27,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:27,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:27,385 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:27,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-01 17:55:27,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:27,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:55:27,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:27,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:27,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:27,663 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2022-03-01 17:55:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:27,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:28,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:28,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:28,432 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 [2022-03-01 17:55:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:28,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662926842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:28,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:28,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:55:28,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056271040] [2022-03-01 17:55:28,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:28,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:55:28,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:28,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:55:28,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:55:28,553 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) [2022-03-01 17:55:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:30,235 INFO L93 Difference]: Finished difference Result 1974 states and 6440 transitions. [2022-03-01 17:55:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:55:30,236 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 [2022-03-01 17:55:30,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:30,239 INFO L225 Difference]: With dead ends: 1974 [2022-03-01 17:55:30,239 INFO L226 Difference]: Without dead ends: 1960 [2022-03-01 17:55:30,239 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 [2022-03-01 17:55:30,239 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2022-03-01 17:55:30,239 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] [2022-03-01 17:55:30,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2022-03-01 17:55:30,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1657. [2022-03-01 17:55:30,257 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) [2022-03-01 17:55:30,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5467 transitions. [2022-03-01 17:55:30,260 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5467 transitions. Word has length 24 [2022-03-01 17:55:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:30,260 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 5467 transitions. [2022-03-01 17:55:30,260 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) [2022-03-01 17:55:30,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5467 transitions. [2022-03-01 17:55:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:30,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:30,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:30,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:30,463 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 [2022-03-01 17:55:30,463 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:30,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:30,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1320486233, now seen corresponding path program 92 times [2022-03-01 17:55:30,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:30,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116178284] [2022-03-01 17:55:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:30,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:30,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:30,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116178284] [2022-03-01 17:55:30,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116178284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:30,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281477885] [2022-03-01 17:55:30,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:30,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:30,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:30,688 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:30,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-01 17:55:30,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:30,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:30,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:55:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:31,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:31,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:31,267 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 33 treesize of output 21 [2022-03-01 17:55:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:31,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:31,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:31,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:31,682 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 [2022-03-01 17:55:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:31,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281477885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:31,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:31,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-01 17:55:31,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204384898] [2022-03-01 17:55:31,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:31,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:55:31,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:55:31,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:55:31,763 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) [2022-03-01 17:55:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:33,859 INFO L93 Difference]: Finished difference Result 2230 states and 7183 transitions. [2022-03-01 17:55:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 17:55:33,859 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 [2022-03-01 17:55:33,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:33,872 INFO L225 Difference]: With dead ends: 2230 [2022-03-01 17:55:33,873 INFO L226 Difference]: Without dead ends: 2226 [2022-03-01 17:55:33,873 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 [2022-03-01 17:55:33,873 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 [2022-03-01 17:55:33,873 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] [2022-03-01 17:55:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-03-01 17:55:33,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1705. [2022-03-01 17:55:33,893 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) [2022-03-01 17:55:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5593 transitions. [2022-03-01 17:55:33,896 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5593 transitions. Word has length 24 [2022-03-01 17:55:33,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:33,896 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 5593 transitions. [2022-03-01 17:55:33,896 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) [2022-03-01 17:55:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5593 transitions. [2022-03-01 17:55:33,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:33,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:33,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:33,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-01 17:55:34,098 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 [2022-03-01 17:55:34,099 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:34,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:34,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1710035489, now seen corresponding path program 93 times [2022-03-01 17:55:34,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:34,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124998021] [2022-03-01 17:55:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:34,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:34,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:34,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124998021] [2022-03-01 17:55:34,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124998021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:34,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356008006] [2022-03-01 17:55:34,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:34,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:34,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:34,316 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:34,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-01 17:55:34,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:55:34,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:34,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:34,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:34,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:34,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:34,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:34,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:55:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:34,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:34,935 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:55:34,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:55:34,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:34,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:34,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:35,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356008006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:35,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:35,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:55:35,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226648155] [2022-03-01 17:55:35,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:35,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:55:35,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:55:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:55:35,006 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) [2022-03-01 17:55:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:36,131 INFO L93 Difference]: Finished difference Result 2122 states and 6832 transitions. [2022-03-01 17:55:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:55:36,131 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 [2022-03-01 17:55:36,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:36,135 INFO L225 Difference]: With dead ends: 2122 [2022-03-01 17:55:36,135 INFO L226 Difference]: Without dead ends: 2115 [2022-03-01 17:55:36,135 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 [2022-03-01 17:55:36,136 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 [2022-03-01 17:55:36,136 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] [2022-03-01 17:55:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2022-03-01 17:55:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1722. [2022-03-01 17:55:36,155 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) [2022-03-01 17:55:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 5642 transitions. [2022-03-01 17:55:36,158 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 5642 transitions. Word has length 24 [2022-03-01 17:55:36,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:36,158 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 5642 transitions. [2022-03-01 17:55:36,158 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) [2022-03-01 17:55:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 5642 transitions. [2022-03-01 17:55:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:36,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:36,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:36,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-01 17:55:36,361 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 [2022-03-01 17:55:36,361 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:36,361 INFO L85 PathProgramCache]: Analyzing trace with hash -131973757, now seen corresponding path program 94 times [2022-03-01 17:55:36,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:36,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637783002] [2022-03-01 17:55:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:36,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:36,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:36,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637783002] [2022-03-01 17:55:36,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637783002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:36,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439149550] [2022-03-01 17:55:36,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:36,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:36,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:36,621 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:36,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-01 17:55:36,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:36,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:36,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:36,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:36,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:36,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:36,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:36,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:36,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:36,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:37,204 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:55:37,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:55:37,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:37,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:37,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:37,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:37,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:55:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:37,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439149550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:37,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:37,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:37,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744415176] [2022-03-01 17:55:37,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:37,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:37,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:37,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:37,276 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) [2022-03-01 17:55:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:38,081 INFO L93 Difference]: Finished difference Result 2155 states and 7039 transitions. [2022-03-01 17:55:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:55:38,081 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 [2022-03-01 17:55:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:38,085 INFO L225 Difference]: With dead ends: 2155 [2022-03-01 17:55:38,085 INFO L226 Difference]: Without dead ends: 2149 [2022-03-01 17:55:38,085 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 [2022-03-01 17:55:38,085 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 [2022-03-01 17:55:38,085 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] [2022-03-01 17:55:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2022-03-01 17:55:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1710. [2022-03-01 17:55:38,103 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) [2022-03-01 17:55:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5610 transitions. [2022-03-01 17:55:38,106 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5610 transitions. Word has length 24 [2022-03-01 17:55:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:38,106 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 5610 transitions. [2022-03-01 17:55:38,106 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) [2022-03-01 17:55:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5610 transitions. [2022-03-01 17:55:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:38,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:38,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:38,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-03-01 17:55:38,309 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 [2022-03-01 17:55:38,309 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:38,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1017772037, now seen corresponding path program 95 times [2022-03-01 17:55:38,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:38,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554238658] [2022-03-01 17:55:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:38,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:38,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:38,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554238658] [2022-03-01 17:55:38,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554238658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:38,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697935692] [2022-03-01 17:55:38,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:38,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:38,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:38,536 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:38,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-01 17:55:38,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:55:38,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:38,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:38,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:38,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:38,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:38,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:38,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:38,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:55:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:38,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:39,128 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:55:39,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:55:39,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:39,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:39,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:55:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:39,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697935692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:39,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:39,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:39,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142035987] [2022-03-01 17:55:39,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:39,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:39,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:39,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:39,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:39,205 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) [2022-03-01 17:55:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:39,982 INFO L93 Difference]: Finished difference Result 2050 states and 6701 transitions. [2022-03-01 17:55:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:55:39,982 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 [2022-03-01 17:55:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:39,986 INFO L225 Difference]: With dead ends: 2050 [2022-03-01 17:55:39,986 INFO L226 Difference]: Without dead ends: 2043 [2022-03-01 17:55:39,987 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 [2022-03-01 17:55:39,987 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 [2022-03-01 17:55:39,987 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] [2022-03-01 17:55:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-03-01 17:55:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1730. [2022-03-01 17:55:40,018 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) [2022-03-01 17:55:40,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5675 transitions. [2022-03-01 17:55:40,021 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5675 transitions. Word has length 24 [2022-03-01 17:55:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:40,021 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 5675 transitions. [2022-03-01 17:55:40,021 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) [2022-03-01 17:55:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5675 transitions. [2022-03-01 17:55:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:40,023 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:40,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:40,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-01 17:55:40,224 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 [2022-03-01 17:55:40,224 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1621884029, now seen corresponding path program 96 times [2022-03-01 17:55:40,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:40,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646187351] [2022-03-01 17:55:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:40,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:40,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:40,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646187351] [2022-03-01 17:55:40,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646187351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:40,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897716489] [2022-03-01 17:55:40,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:40,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:40,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:40,449 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:40,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-01 17:55:40,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:55:40,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:55:40,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:41,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:41,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:41,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:41,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:41,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:41,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:41,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:41,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:41,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:55:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:41,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897716489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:41,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:41,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:55:41,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8265226] [2022-03-01 17:55:41,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:41,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:55:41,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:41,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:55:41,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:55:41,957 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) [2022-03-01 17:55:43,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:43,705 INFO L93 Difference]: Finished difference Result 2441 states and 7966 transitions. [2022-03-01 17:55:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 17:55:43,705 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 [2022-03-01 17:55:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:43,709 INFO L225 Difference]: With dead ends: 2441 [2022-03-01 17:55:43,709 INFO L226 Difference]: Without dead ends: 2432 [2022-03-01 17:55:43,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=665, Invalid=3891, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 17:55:43,709 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 [2022-03-01 17:55:43,709 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] [2022-03-01 17:55:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2022-03-01 17:55:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1815. [2022-03-01 17:55:43,730 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) [2022-03-01 17:55:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 5925 transitions. [2022-03-01 17:55:43,733 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 5925 transitions. Word has length 24 [2022-03-01 17:55:43,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:43,733 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 5925 transitions. [2022-03-01 17:55:43,733 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) [2022-03-01 17:55:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 5925 transitions. [2022-03-01 17:55:43,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:43,735 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:43,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:43,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-01 17:55:43,935 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 [2022-03-01 17:55:43,936 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:43,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2008343658, now seen corresponding path program 15 times [2022-03-01 17:55:43,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:43,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808971646] [2022-03-01 17:55:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:43,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:44,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:44,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808971646] [2022-03-01 17:55:44,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808971646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:44,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287745259] [2022-03-01 17:55:44,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:44,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:44,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:44,185 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:44,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-01 17:55:44,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:55:44,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:44,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:55:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:44,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:44,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:44,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:44,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:44,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:44,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:45,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:45,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:45,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:45,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287745259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:45,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:45,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:55:45,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811926751] [2022-03-01 17:55:45,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:45,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:55:45,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:55:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:55:45,185 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) [2022-03-01 17:55:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:47,754 INFO L93 Difference]: Finished difference Result 2571 states and 8240 transitions. [2022-03-01 17:55:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 17:55:47,754 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 [2022-03-01 17:55:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:47,758 INFO L225 Difference]: With dead ends: 2571 [2022-03-01 17:55:47,759 INFO L226 Difference]: Without dead ends: 2561 [2022-03-01 17:55:47,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=531, Invalid=5321, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 17:55:47,759 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 [2022-03-01 17:55:47,759 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] [2022-03-01 17:55:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2022-03-01 17:55:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1846. [2022-03-01 17:55:47,781 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) [2022-03-01 17:55:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6002 transitions. [2022-03-01 17:55:47,784 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6002 transitions. Word has length 24 [2022-03-01 17:55:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:47,784 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 6002 transitions. [2022-03-01 17:55:47,785 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) [2022-03-01 17:55:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6002 transitions. [2022-03-01 17:55:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:47,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:47,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:47,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-03-01 17:55:47,987 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 [2022-03-01 17:55:47,987 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1008952667, now seen corresponding path program 97 times [2022-03-01 17:55:47,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:47,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553389233] [2022-03-01 17:55:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:47,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:48,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:48,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553389233] [2022-03-01 17:55:48,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553389233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:48,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890370616] [2022-03-01 17:55:48,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:48,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:48,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:48,219 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:48,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-01 17:55:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:48,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:48,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:48,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:48,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:55:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:48,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:48,807 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:55:48,808 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:55:48,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:48,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:48,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:48,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:48,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:48,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890370616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:48,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:48,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:48,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893756487] [2022-03-01 17:55:48,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:48,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:48,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:48,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:48,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:48,882 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) [2022-03-01 17:55:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:49,578 INFO L93 Difference]: Finished difference Result 2249 states and 7227 transitions. [2022-03-01 17:55:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:55:49,579 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 [2022-03-01 17:55:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:49,582 INFO L225 Difference]: With dead ends: 2249 [2022-03-01 17:55:49,582 INFO L226 Difference]: Without dead ends: 2242 [2022-03-01 17:55:49,583 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 [2022-03-01 17:55:49,583 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:49,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 98 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 855 Invalid, 0 Unknown, 365 Unchecked, 0.3s Time] [2022-03-01 17:55:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-03-01 17:55:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1858. [2022-03-01 17:55:49,602 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) [2022-03-01 17:55:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6041 transitions. [2022-03-01 17:55:49,621 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6041 transitions. Word has length 24 [2022-03-01 17:55:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:49,621 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6041 transitions. [2022-03-01 17:55:49,621 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) [2022-03-01 17:55:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6041 transitions. [2022-03-01 17:55:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:49,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:49,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:49,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:49,824 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 [2022-03-01 17:55:49,824 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash -3739865, now seen corresponding path program 98 times [2022-03-01 17:55:49,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:49,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967339102] [2022-03-01 17:55:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:49,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:50,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:50,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967339102] [2022-03-01 17:55:50,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967339102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:50,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433484385] [2022-03-01 17:55:50,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:50,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:50,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:50,084 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:50,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-01 17:55:50,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:50,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:50,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:55:50,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:50,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:50,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:50,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:50,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:50,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:55:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:50,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:51,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:51,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:51,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:51,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:51,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433484385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:51,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:51,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:55:51,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990240833] [2022-03-01 17:55:51,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:51,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:55:51,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:51,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:55:51,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:55:51,241 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) [2022-03-01 17:55:52,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:52,974 INFO L93 Difference]: Finished difference Result 2943 states and 9800 transitions. [2022-03-01 17:55:52,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:55:52,975 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 [2022-03-01 17:55:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:52,980 INFO L225 Difference]: With dead ends: 2943 [2022-03-01 17:55:52,980 INFO L226 Difference]: Without dead ends: 2933 [2022-03-01 17:55:52,980 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 [2022-03-01 17:55:52,980 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 [2022-03-01 17:55:52,980 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] [2022-03-01 17:55:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2022-03-01 17:55:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 1873. [2022-03-01 17:55:53,004 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) [2022-03-01 17:55:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6092 transitions. [2022-03-01 17:55:53,007 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6092 transitions. Word has length 24 [2022-03-01 17:55:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:53,007 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 6092 transitions. [2022-03-01 17:55:53,007 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) [2022-03-01 17:55:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6092 transitions. [2022-03-01 17:55:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:53,010 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:53,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:53,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-01 17:55:53,210 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 [2022-03-01 17:55:53,210 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:53,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:53,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1310540155, now seen corresponding path program 99 times [2022-03-01 17:55:53,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:53,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617174047] [2022-03-01 17:55:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:53,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:53,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:53,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617174047] [2022-03-01 17:55:53,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617174047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:53,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064302562] [2022-03-01 17:55:53,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:53,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:53,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:53,475 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:53,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-01 17:55:53,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:55:53,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:55:53,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:53,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:53,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:53,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:55:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:53,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:54,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:54,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:54,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:54,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064302562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:54,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:54,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:55:54,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536897568] [2022-03-01 17:55:54,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:54,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:55:54,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:54,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:55:54,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:55:54,413 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) [2022-03-01 17:55:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:55,627 INFO L93 Difference]: Finished difference Result 2232 states and 7157 transitions. [2022-03-01 17:55:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:55:55,628 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 [2022-03-01 17:55:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:55,631 INFO L225 Difference]: With dead ends: 2232 [2022-03-01 17:55:55,631 INFO L226 Difference]: Without dead ends: 2226 [2022-03-01 17:55:55,631 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 [2022-03-01 17:55:55,632 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:55,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 148 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1310 Invalid, 0 Unknown, 689 Unchecked, 0.5s Time] [2022-03-01 17:55:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-03-01 17:55:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1877. [2022-03-01 17:55:55,651 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) [2022-03-01 17:55:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 6099 transitions. [2022-03-01 17:55:55,654 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 6099 transitions. Word has length 24 [2022-03-01 17:55:55,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:55,654 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 6099 transitions. [2022-03-01 17:55:55,654 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) [2022-03-01 17:55:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 6099 transitions. [2022-03-01 17:55:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:55,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:55,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:55,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-01 17:55:55,857 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 [2022-03-01 17:55:55,857 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:55,858 INFO L85 PathProgramCache]: Analyzing trace with hash 230032295, now seen corresponding path program 100 times [2022-03-01 17:55:55,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:55,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750084268] [2022-03-01 17:55:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:55,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:56,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:56,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750084268] [2022-03-01 17:55:56,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750084268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:56,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377798994] [2022-03-01 17:55:56,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:56,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:56,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:56,160 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:56,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-01 17:55:56,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:56,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:56,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:56,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:56,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:56,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:56,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:55:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:56,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:56,796 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:55:56,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:55:56,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:56,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:56,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:56,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:56,840 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 20 treesize of output 3 [2022-03-01 17:55:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:56,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377798994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:56,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:56,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:55:56,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954248607] [2022-03-01 17:55:56,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:56,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:56,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:56,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:56,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:56,857 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) [2022-03-01 17:55:57,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:57,996 INFO L93 Difference]: Finished difference Result 2214 states and 7180 transitions. [2022-03-01 17:55:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:55:57,996 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 [2022-03-01 17:55:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:58,000 INFO L225 Difference]: With dead ends: 2214 [2022-03-01 17:55:58,000 INFO L226 Difference]: Without dead ends: 2204 [2022-03-01 17:55:58,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:55:58,000 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:58,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 65 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1304 Invalid, 0 Unknown, 654 Unchecked, 0.5s Time] [2022-03-01 17:55:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-03-01 17:55:58,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1893. [2022-03-01 17:55:58,020 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) [2022-03-01 17:55:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6151 transitions. [2022-03-01 17:55:58,023 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6151 transitions. Word has length 24 [2022-03-01 17:55:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:58,024 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 6151 transitions. [2022-03-01 17:55:58,024 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) [2022-03-01 17:55:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6151 transitions. [2022-03-01 17:55:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:55:58,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:58,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:58,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-03-01 17:55:58,226 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 [2022-03-01 17:55:58,226 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:55:58,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:58,227 INFO L85 PathProgramCache]: Analyzing trace with hash 715549660, now seen corresponding path program 6 times [2022-03-01 17:55:58,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:58,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327130349] [2022-03-01 17:55:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:58,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:58,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:58,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327130349] [2022-03-01 17:55:58,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327130349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:58,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601046486] [2022-03-01 17:55:58,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:58,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:58,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:58,467 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:58,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-01 17:55:58,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:55:58,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:58,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:55:58,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:59,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:59,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:59,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:59,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:59,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:55:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:59,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:59,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:59,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:59,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:59,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:59,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:55:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:59,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601046486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:59,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:59,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:55:59,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913792342] [2022-03-01 17:55:59,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:59,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:55:59,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:59,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:55:59,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:55:59,981 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) [2022-03-01 17:56:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:00,683 INFO L93 Difference]: Finished difference Result 2227 states and 7098 transitions. [2022-03-01 17:56:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:56:00,684 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 [2022-03-01 17:56:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:00,687 INFO L225 Difference]: With dead ends: 2227 [2022-03-01 17:56:00,687 INFO L226 Difference]: Without dead ends: 2225 [2022-03-01 17:56:00,687 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 [2022-03-01 17:56:00,687 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 [2022-03-01 17:56:00,688 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] [2022-03-01 17:56:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2022-03-01 17:56:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1964. [2022-03-01 17:56:00,708 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) [2022-03-01 17:56:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 6375 transitions. [2022-03-01 17:56:00,711 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 6375 transitions. Word has length 24 [2022-03-01 17:56:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:00,711 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 6375 transitions. [2022-03-01 17:56:00,711 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) [2022-03-01 17:56:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 6375 transitions. [2022-03-01 17:56:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:00,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:00,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:00,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:00,915 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 [2022-03-01 17:56:00,915 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:00,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1105807064, now seen corresponding path program 7 times [2022-03-01 17:56:00,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:00,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677313110] [2022-03-01 17:56:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:00,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:01,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:01,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677313110] [2022-03-01 17:56:01,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677313110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:01,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025203211] [2022-03-01 17:56:01,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:01,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:01,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:01,138 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:01,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-01 17:56:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:01,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:01,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:01,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:01,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:01,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:01,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:01,434 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 [2022-03-01 17:56:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:01,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:01,714 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:56:01,715 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:56:01,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:01,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:01,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:01,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:01,769 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:56:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:01,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025203211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:01,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:01,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:01,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227829291] [2022-03-01 17:56:01,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:01,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:01,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:01,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:01,786 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) [2022-03-01 17:56:02,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:02,633 INFO L93 Difference]: Finished difference Result 2382 states and 7597 transitions. [2022-03-01 17:56:02,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:56:02,633 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 [2022-03-01 17:56:02,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:02,638 INFO L225 Difference]: With dead ends: 2382 [2022-03-01 17:56:02,638 INFO L226 Difference]: Without dead ends: 2377 [2022-03-01 17:56:02,638 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 [2022-03-01 17:56:02,638 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 [2022-03-01 17:56:02,638 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] [2022-03-01 17:56:02,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-03-01 17:56:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1965. [2022-03-01 17:56:02,660 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) [2022-03-01 17:56:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 6380 transitions. [2022-03-01 17:56:02,663 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 6380 transitions. Word has length 24 [2022-03-01 17:56:02,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:02,663 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 6380 transitions. [2022-03-01 17:56:02,663 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) [2022-03-01 17:56:02,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 6380 transitions. [2022-03-01 17:56:02,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:02,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:02,666 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] [2022-03-01 17:56:02,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:02,866 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 [2022-03-01 17:56:02,866 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:02,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1091904803, now seen corresponding path program 1 times [2022-03-01 17:56:02,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:02,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132457904] [2022-03-01 17:56:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:02,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:03,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:03,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132457904] [2022-03-01 17:56:03,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132457904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:03,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075846803] [2022-03-01 17:56:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:03,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:03,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:03,167 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:03,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-01 17:56:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:03,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:03,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:03,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:03,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:03,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:03,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:03,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:56:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:03,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:03,757 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:56:03,757 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:56:03,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:03,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:03,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:03,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:03,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:56:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:03,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075846803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:03,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:03,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:03,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402859842] [2022-03-01 17:56:03,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:03,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:03,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:03,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:03,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:03,818 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) [2022-03-01 17:56:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:04,675 INFO L93 Difference]: Finished difference Result 2285 states and 7368 transitions. [2022-03-01 17:56:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:56:04,675 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 [2022-03-01 17:56:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:04,679 INFO L225 Difference]: With dead ends: 2285 [2022-03-01 17:56:04,679 INFO L226 Difference]: Without dead ends: 2281 [2022-03-01 17:56:04,679 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 [2022-03-01 17:56:04,679 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 [2022-03-01 17:56:04,679 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] [2022-03-01 17:56:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2022-03-01 17:56:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1963. [2022-03-01 17:56:04,699 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) [2022-03-01 17:56:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6374 transitions. [2022-03-01 17:56:04,702 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6374 transitions. Word has length 24 [2022-03-01 17:56:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:04,702 INFO L470 AbstractCegarLoop]: Abstraction has 1963 states and 6374 transitions. [2022-03-01 17:56:04,702 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) [2022-03-01 17:56:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6374 transitions. [2022-03-01 17:56:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:04,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:04,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:04,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-01 17:56:04,905 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 [2022-03-01 17:56:04,905 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:04,906 INFO L85 PathProgramCache]: Analyzing trace with hash -297142872, now seen corresponding path program 8 times [2022-03-01 17:56:04,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:04,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463332605] [2022-03-01 17:56:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:04,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:05,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:05,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463332605] [2022-03-01 17:56:05,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463332605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:05,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282393809] [2022-03-01 17:56:05,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:05,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:05,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:05,146 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:05,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-01 17:56:05,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:05,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:05,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:05,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:05,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:05,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:05,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:05,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:56:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:05,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:06,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:06,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:06,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:06,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:56:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:06,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282393809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:06,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:06,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:56:06,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184141938] [2022-03-01 17:56:06,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:06,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:56:06,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:06,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:56:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:56:06,291 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) [2022-03-01 17:56:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:08,579 INFO L93 Difference]: Finished difference Result 3351 states and 11150 transitions. [2022-03-01 17:56:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:56:08,579 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 [2022-03-01 17:56:08,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:08,585 INFO L225 Difference]: With dead ends: 3351 [2022-03-01 17:56:08,585 INFO L226 Difference]: Without dead ends: 3341 [2022-03-01 17:56:08,585 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 [2022-03-01 17:56:08,585 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 [2022-03-01 17:56:08,585 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] [2022-03-01 17:56:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2022-03-01 17:56:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2001. [2022-03-01 17:56:08,612 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) [2022-03-01 17:56:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 6498 transitions. [2022-03-01 17:56:08,616 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 6498 transitions. Word has length 24 [2022-03-01 17:56:08,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:08,616 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 6498 transitions. [2022-03-01 17:56:08,616 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) [2022-03-01 17:56:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 6498 transitions. [2022-03-01 17:56:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:08,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:08,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:08,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-01 17:56:08,819 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 [2022-03-01 17:56:08,819 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:08,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2104597335, now seen corresponding path program 2 times [2022-03-01 17:56:08,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:08,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061598315] [2022-03-01 17:56:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:08,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:09,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:09,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061598315] [2022-03-01 17:56:09,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061598315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:09,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446556036] [2022-03-01 17:56:09,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:09,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:09,057 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:09,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-01 17:56:09,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:09,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:09,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:09,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:09,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:09,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:09,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:09,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:56:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:09,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:10,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:10,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:10,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:10,085 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 [2022-03-01 17:56:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:10,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446556036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:10,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:10,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:56:10,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112385591] [2022-03-01 17:56:10,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:10,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:56:10,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:10,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:56:10,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:56:10,208 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) [2022-03-01 17:56:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:11,328 INFO L93 Difference]: Finished difference Result 2462 states and 8050 transitions. [2022-03-01 17:56:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:56:11,329 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 [2022-03-01 17:56:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:11,333 INFO L225 Difference]: With dead ends: 2462 [2022-03-01 17:56:11,333 INFO L226 Difference]: Without dead ends: 2454 [2022-03-01 17:56:11,333 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 [2022-03-01 17:56:11,333 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 [2022-03-01 17:56:11,333 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] [2022-03-01 17:56:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2022-03-01 17:56:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2003. [2022-03-01 17:56:11,354 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) [2022-03-01 17:56:11,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6502 transitions. [2022-03-01 17:56:11,358 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6502 transitions. Word has length 24 [2022-03-01 17:56:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:11,358 INFO L470 AbstractCegarLoop]: Abstraction has 2003 states and 6502 transitions. [2022-03-01 17:56:11,358 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) [2022-03-01 17:56:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6502 transitions. [2022-03-01 17:56:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:11,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:11,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:11,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-01 17:56:11,561 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 [2022-03-01 17:56:11,561 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:11,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1017137148, now seen corresponding path program 9 times [2022-03-01 17:56:11,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:11,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567314125] [2022-03-01 17:56:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:11,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:11,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:11,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567314125] [2022-03-01 17:56:11,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567314125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:11,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536312579] [2022-03-01 17:56:11,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:11,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:11,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:11,808 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:11,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-01 17:56:11,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:56:11,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:11,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:11,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:12,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:12,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:12,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 17:56:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:12,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:12,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:12,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:12,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:56:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:12,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536312579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:12,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:12,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:56:12,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937185347] [2022-03-01 17:56:12,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:12,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:56:12,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:12,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:56:12,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:56:12,709 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) [2022-03-01 17:56:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:13,622 INFO L93 Difference]: Finished difference Result 2324 states and 7479 transitions. [2022-03-01 17:56:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:56:13,622 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 [2022-03-01 17:56:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:13,626 INFO L225 Difference]: With dead ends: 2324 [2022-03-01 17:56:13,626 INFO L226 Difference]: Without dead ends: 2319 [2022-03-01 17:56:13,626 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 [2022-03-01 17:56:13,626 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 [2022-03-01 17:56:13,626 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] [2022-03-01 17:56:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2022-03-01 17:56:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2002. [2022-03-01 17:56:13,647 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) [2022-03-01 17:56:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6499 transitions. [2022-03-01 17:56:13,650 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6499 transitions. Word has length 24 [2022-03-01 17:56:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:13,650 INFO L470 AbstractCegarLoop]: Abstraction has 2002 states and 6499 transitions. [2022-03-01 17:56:13,651 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) [2022-03-01 17:56:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6499 transitions. [2022-03-01 17:56:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:13,653 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:13,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:13,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-03-01 17:56:13,853 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 [2022-03-01 17:56:13,853 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:13,854 INFO L85 PathProgramCache]: Analyzing trace with hash -516236142, now seen corresponding path program 16 times [2022-03-01 17:56:13,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:13,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871202380] [2022-03-01 17:56:13,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:13,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:14,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:14,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871202380] [2022-03-01 17:56:14,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871202380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:14,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240123069] [2022-03-01 17:56:14,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:14,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:14,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:14,073 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:14,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-01 17:56:14,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:14,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:14,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:14,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:14,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:14,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:14,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:14,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:14,381 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:56:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:14,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:14,658 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:56:14,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:56:14,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:14,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:14,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:56:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:14,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240123069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:14,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:14,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:14,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079786431] [2022-03-01 17:56:14,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:14,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:14,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:14,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:14,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:14,717 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) [2022-03-01 17:56:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:15,634 INFO L93 Difference]: Finished difference Result 2438 states and 7772 transitions. [2022-03-01 17:56:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:56:15,634 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 [2022-03-01 17:56:15,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:15,638 INFO L225 Difference]: With dead ends: 2438 [2022-03-01 17:56:15,638 INFO L226 Difference]: Without dead ends: 2433 [2022-03-01 17:56:15,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:56:15,639 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 [2022-03-01 17:56:15,639 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] [2022-03-01 17:56:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2022-03-01 17:56:15,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2003. [2022-03-01 17:56:15,660 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) [2022-03-01 17:56:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6501 transitions. [2022-03-01 17:56:15,663 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6501 transitions. Word has length 24 [2022-03-01 17:56:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:15,664 INFO L470 AbstractCegarLoop]: Abstraction has 2003 states and 6501 transitions. [2022-03-01 17:56:15,664 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) [2022-03-01 17:56:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6501 transitions. [2022-03-01 17:56:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:15,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:15,666 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] [2022-03-01 17:56:15,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-03-01 17:56:15,866 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 [2022-03-01 17:56:15,867 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:15,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:15,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1528928674, now seen corresponding path program 17 times [2022-03-01 17:56:15,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:15,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866724606] [2022-03-01 17:56:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:15,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:16,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:16,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866724606] [2022-03-01 17:56:16,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866724606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:16,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908606044] [2022-03-01 17:56:16,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:16,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:16,110 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:16,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-01 17:56:16,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:56:16,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:16,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:16,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:16,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:16,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:16,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:56:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:16,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:16,726 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:56:16,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:56:16,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:16,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:16,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:16,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:16,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:56:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:16,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908606044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:16,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:16,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:16,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736240077] [2022-03-01 17:56:16,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:16,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:16,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:16,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:16,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:16,802 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) [2022-03-01 17:56:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:18,048 INFO L93 Difference]: Finished difference Result 2506 states and 8053 transitions. [2022-03-01 17:56:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:56:18,048 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 [2022-03-01 17:56:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:18,052 INFO L225 Difference]: With dead ends: 2506 [2022-03-01 17:56:18,052 INFO L226 Difference]: Without dead ends: 2499 [2022-03-01 17:56:18,052 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 [2022-03-01 17:56:18,053 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 [2022-03-01 17:56:18,053 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] [2022-03-01 17:56:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-03-01 17:56:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1997. [2022-03-01 17:56:18,075 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) [2022-03-01 17:56:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 6507 transitions. [2022-03-01 17:56:18,078 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 6507 transitions. Word has length 24 [2022-03-01 17:56:18,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:18,078 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 6507 transitions. [2022-03-01 17:56:18,079 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) [2022-03-01 17:56:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 6507 transitions. [2022-03-01 17:56:18,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:18,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:18,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:18,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-01 17:56:18,281 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 [2022-03-01 17:56:18,281 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:18,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:18,282 INFO L85 PathProgramCache]: Analyzing trace with hash -387153423, now seen corresponding path program 3 times [2022-03-01 17:56:18,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:18,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269741141] [2022-03-01 17:56:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:18,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:18,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:18,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269741141] [2022-03-01 17:56:18,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269741141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:18,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244798147] [2022-03-01 17:56:18,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:18,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:18,507 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:18,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-01 17:56:18,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:56:18,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:18,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:19,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:19,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:19,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:19,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:19,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 17:56:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:19,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:19,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:19,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:19,432 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 [2022-03-01 17:56:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:19,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244798147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:19,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:19,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:56:19,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670525656] [2022-03-01 17:56:19,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:19,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:56:19,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:19,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:56:19,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:56:19,614 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) [2022-03-01 17:56:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:22,278 INFO L93 Difference]: Finished difference Result 2682 states and 8625 transitions. [2022-03-01 17:56:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-01 17:56:22,279 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 [2022-03-01 17:56:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:22,283 INFO L225 Difference]: With dead ends: 2682 [2022-03-01 17:56:22,283 INFO L226 Difference]: Without dead ends: 2673 [2022-03-01 17:56:22,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=541, Invalid=5939, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 17:56:22,284 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 [2022-03-01 17:56:22,284 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] [2022-03-01 17:56:22,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-03-01 17:56:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2019. [2022-03-01 17:56:22,307 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) [2022-03-01 17:56:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 6568 transitions. [2022-03-01 17:56:22,310 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 6568 transitions. Word has length 24 [2022-03-01 17:56:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:22,310 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 6568 transitions. [2022-03-01 17:56:22,310 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) [2022-03-01 17:56:22,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 6568 transitions. [2022-03-01 17:56:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:22,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:22,313 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] [2022-03-01 17:56:22,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:22,513 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 [2022-03-01 17:56:22,513 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:22,513 INFO L85 PathProgramCache]: Analyzing trace with hash 856297860, now seen corresponding path program 10 times [2022-03-01 17:56:22,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:22,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123135965] [2022-03-01 17:56:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:22,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:22,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:22,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123135965] [2022-03-01 17:56:22,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123135965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:22,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2944211] [2022-03-01 17:56:22,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:22,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:22,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:22,736 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:22,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-01 17:56:22,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:22,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:22,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:22,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:23,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:23,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:23,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:23,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:23,054 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 33 treesize of output 17 [2022-03-01 17:56:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:23,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:23,330 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:56:23,330 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:56:23,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:23,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:23,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:23,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:23,385 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 [2022-03-01 17:56:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:23,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2944211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:23,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:23,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:23,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125257573] [2022-03-01 17:56:23,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:23,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:23,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:23,402 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) [2022-03-01 17:56:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:24,209 INFO L93 Difference]: Finished difference Result 2425 states and 7756 transitions. [2022-03-01 17:56:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:56:24,209 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 [2022-03-01 17:56:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:24,213 INFO L225 Difference]: With dead ends: 2425 [2022-03-01 17:56:24,213 INFO L226 Difference]: Without dead ends: 2420 [2022-03-01 17:56:24,214 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 [2022-03-01 17:56:24,214 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-03-01 17:56:24,214 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] [2022-03-01 17:56:24,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-03-01 17:56:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2020. [2022-03-01 17:56:24,247 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) [2022-03-01 17:56:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 6571 transitions. [2022-03-01 17:56:24,251 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 6571 transitions. Word has length 24 [2022-03-01 17:56:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:24,251 INFO L470 AbstractCegarLoop]: Abstraction has 2020 states and 6571 transitions. [2022-03-01 17:56:24,251 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) [2022-03-01 17:56:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 6571 transitions. [2022-03-01 17:56:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:24,254 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:24,254 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] [2022-03-01 17:56:24,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-01 17:56:24,454 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 [2022-03-01 17:56:24,454 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:24,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash -799013370, now seen corresponding path program 11 times [2022-03-01 17:56:24,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:24,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102057271] [2022-03-01 17:56:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:24,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:24,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102057271] [2022-03-01 17:56:24,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102057271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:24,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104592255] [2022-03-01 17:56:24,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:24,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:24,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:24,678 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:24,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-01 17:56:24,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:56:24,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:24,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:24,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:24,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:24,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:24,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:24,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:56:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:25,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:25,273 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:56:25,273 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:56:25,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:25,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:25,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:25,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:25,337 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 [2022-03-01 17:56:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:25,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104592255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:25,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:25,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:25,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816441028] [2022-03-01 17:56:25,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:25,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:25,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:25,354 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) [2022-03-01 17:56:26,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:26,280 INFO L93 Difference]: Finished difference Result 2712 states and 8738 transitions. [2022-03-01 17:56:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:56:26,280 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 [2022-03-01 17:56:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:26,285 INFO L225 Difference]: With dead ends: 2712 [2022-03-01 17:56:26,285 INFO L226 Difference]: Without dead ends: 2705 [2022-03-01 17:56:26,285 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 [2022-03-01 17:56:26,285 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 [2022-03-01 17:56:26,285 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] [2022-03-01 17:56:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-03-01 17:56:26,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2027. [2022-03-01 17:56:26,318 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) [2022-03-01 17:56:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6599 transitions. [2022-03-01 17:56:26,323 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6599 transitions. Word has length 24 [2022-03-01 17:56:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:26,323 INFO L470 AbstractCegarLoop]: Abstraction has 2027 states and 6599 transitions. [2022-03-01 17:56:26,323 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) [2022-03-01 17:56:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6599 transitions. [2022-03-01 17:56:26,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:26,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:26,326 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] [2022-03-01 17:56:26,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:26,547 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 [2022-03-01 17:56:26,547 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:26,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:26,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1411944732, now seen corresponding path program 12 times [2022-03-01 17:56:26,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:26,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413599744] [2022-03-01 17:56:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:26,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:26,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:26,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413599744] [2022-03-01 17:56:26,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413599744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:26,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458120228] [2022-03-01 17:56:26,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:26,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:26,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:26,778 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:26,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-01 17:56:26,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:56:26,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:26,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:56:26,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:27,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:27,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:27,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:27,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:27,360 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-03-01 17:56:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:27,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:28,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:28,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:28,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:28,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:28,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:56:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:28,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458120228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:28,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:28,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:56:28,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351437285] [2022-03-01 17:56:28,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:28,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:56:28,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:28,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:56:28,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:56:28,309 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) [2022-03-01 17:56:29,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:29,400 INFO L93 Difference]: Finished difference Result 2393 states and 7634 transitions. [2022-03-01 17:56:29,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:56:29,400 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 [2022-03-01 17:56:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:29,405 INFO L225 Difference]: With dead ends: 2393 [2022-03-01 17:56:29,405 INFO L226 Difference]: Without dead ends: 2389 [2022-03-01 17:56:29,405 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 [2022-03-01 17:56:29,405 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 [2022-03-01 17:56:29,405 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] [2022-03-01 17:56:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-03-01 17:56:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2070. [2022-03-01 17:56:29,436 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) [2022-03-01 17:56:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 6730 transitions. [2022-03-01 17:56:29,441 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 6730 transitions. Word has length 24 [2022-03-01 17:56:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:29,441 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 6730 transitions. [2022-03-01 17:56:29,441 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) [2022-03-01 17:56:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 6730 transitions. [2022-03-01 17:56:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:29,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:29,444 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:29,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:29,666 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 [2022-03-01 17:56:29,666 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:29,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1021687328, now seen corresponding path program 13 times [2022-03-01 17:56:29,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:29,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728768616] [2022-03-01 17:56:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:29,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:29,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:29,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728768616] [2022-03-01 17:56:29,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728768616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:29,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95684905] [2022-03-01 17:56:29,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:29,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:29,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:29,892 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:29,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-01 17:56:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:29,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:29,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:30,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:30,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:30,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:30,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:30,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:56:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:30,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:30,491 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:56:30,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:56:30,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:30,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:30,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:30,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:30,549 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 [2022-03-01 17:56:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:30,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95684905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:30,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:30,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:30,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095334726] [2022-03-01 17:56:30,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:30,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:30,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:30,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:30,568 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) [2022-03-01 17:56:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:31,363 INFO L93 Difference]: Finished difference Result 2491 states and 8001 transitions. [2022-03-01 17:56:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:56:31,364 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 [2022-03-01 17:56:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:31,367 INFO L225 Difference]: With dead ends: 2491 [2022-03-01 17:56:31,368 INFO L226 Difference]: Without dead ends: 2485 [2022-03-01 17:56:31,368 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 [2022-03-01 17:56:31,368 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 [2022-03-01 17:56:31,368 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] [2022-03-01 17:56:31,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2022-03-01 17:56:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2064. [2022-03-01 17:56:31,390 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) [2022-03-01 17:56:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 6719 transitions. [2022-03-01 17:56:31,394 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 6719 transitions. Word has length 24 [2022-03-01 17:56:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:31,394 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 6719 transitions. [2022-03-01 17:56:31,394 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) [2022-03-01 17:56:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 6719 transitions. [2022-03-01 17:56:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:31,396 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:31,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:31,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-01 17:56:31,597 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 [2022-03-01 17:56:31,597 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:31,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1722611165, now seen corresponding path program 101 times [2022-03-01 17:56:31,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:31,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270545279] [2022-03-01 17:56:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:31,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:31,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:31,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270545279] [2022-03-01 17:56:31,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270545279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:31,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928918587] [2022-03-01 17:56:31,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:31,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:31,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:31,860 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:31,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-01 17:56:31,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:56:31,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:31,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:31,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:32,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:32,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:32,132 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 [2022-03-01 17:56:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:32,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:32,465 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:56:32,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:56:32,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:32,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:32,522 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:56:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:32,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928918587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:32,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:32,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:32,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961779735] [2022-03-01 17:56:32,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:32,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:32,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:32,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:32,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:32,539 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) [2022-03-01 17:56:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:33,558 INFO L93 Difference]: Finished difference Result 2348 states and 7639 transitions. [2022-03-01 17:56:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:56:33,558 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 [2022-03-01 17:56:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:33,562 INFO L225 Difference]: With dead ends: 2348 [2022-03-01 17:56:33,562 INFO L226 Difference]: Without dead ends: 2342 [2022-03-01 17:56:33,562 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 [2022-03-01 17:56:33,562 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 [2022-03-01 17:56:33,562 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] [2022-03-01 17:56:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-03-01 17:56:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2062. [2022-03-01 17:56:33,594 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) [2022-03-01 17:56:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 6715 transitions. [2022-03-01 17:56:33,598 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 6715 transitions. Word has length 24 [2022-03-01 17:56:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:33,598 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 6715 transitions. [2022-03-01 17:56:33,598 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) [2022-03-01 17:56:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 6715 transitions. [2022-03-01 17:56:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:33,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:33,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:33,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-01 17:56:33,800 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 [2022-03-01 17:56:33,801 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash 775404772, now seen corresponding path program 14 times [2022-03-01 17:56:33,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:33,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773462284] [2022-03-01 17:56:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:34,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:34,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773462284] [2022-03-01 17:56:34,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773462284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:34,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322922996] [2022-03-01 17:56:34,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:34,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:34,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:34,051 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:34,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-01 17:56:34,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:34,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:34,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:34,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:34,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:34,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:34,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:34,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:56:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:34,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:35,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:35,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:35,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:35,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:56:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:35,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322922996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:35,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:35,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:56:35,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336144260] [2022-03-01 17:56:35,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:35,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:56:35,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:56:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:56:35,215 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) [2022-03-01 17:56:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:38,107 INFO L93 Difference]: Finished difference Result 3248 states and 10717 transitions. [2022-03-01 17:56:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:56:38,107 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 [2022-03-01 17:56:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:38,112 INFO L225 Difference]: With dead ends: 3248 [2022-03-01 17:56:38,112 INFO L226 Difference]: Without dead ends: 3235 [2022-03-01 17:56:38,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 17:56:38,113 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 [2022-03-01 17:56:38,113 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] [2022-03-01 17:56:38,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2022-03-01 17:56:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 2107. [2022-03-01 17:56:38,139 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) [2022-03-01 17:56:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 6883 transitions. [2022-03-01 17:56:38,143 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 6883 transitions. Word has length 24 [2022-03-01 17:56:38,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:38,143 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 6883 transitions. [2022-03-01 17:56:38,143 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) [2022-03-01 17:56:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 6883 transitions. [2022-03-01 17:56:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:38,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:38,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:38,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-01 17:56:38,346 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 [2022-03-01 17:56:38,346 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:38,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:38,346 INFO L85 PathProgramCache]: Analyzing trace with hash -725136200, now seen corresponding path program 15 times [2022-03-01 17:56:38,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:38,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199817767] [2022-03-01 17:56:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:38,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:38,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:38,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199817767] [2022-03-01 17:56:38,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199817767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:38,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342470304] [2022-03-01 17:56:38,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:38,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:38,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:38,646 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:38,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-01 17:56:38,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:56:38,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:38,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:38,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:38,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:38,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:38,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:38,953 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-01 17:56:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:39,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:39,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:39,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:39,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:39,617 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 [2022-03-01 17:56:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:39,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342470304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:39,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:39,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:56:39,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941163884] [2022-03-01 17:56:39,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:39,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:56:39,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:39,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:56:39,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:56:39,781 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) [2022-03-01 17:56:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:42,144 INFO L93 Difference]: Finished difference Result 3163 states and 10622 transitions. [2022-03-01 17:56:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:56:42,145 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 [2022-03-01 17:56:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:42,162 INFO L225 Difference]: With dead ends: 3163 [2022-03-01 17:56:42,163 INFO L226 Difference]: Without dead ends: 3151 [2022-03-01 17:56:42,163 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 [2022-03-01 17:56:42,163 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 [2022-03-01 17:56:42,163 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] [2022-03-01 17:56:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2022-03-01 17:56:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2179. [2022-03-01 17:56:42,188 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) [2022-03-01 17:56:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 7149 transitions. [2022-03-01 17:56:42,192 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 7149 transitions. Word has length 24 [2022-03-01 17:56:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:42,192 INFO L470 AbstractCegarLoop]: Abstraction has 2179 states and 7149 transitions. [2022-03-01 17:56:42,192 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) [2022-03-01 17:56:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 7149 transitions. [2022-03-01 17:56:42,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:42,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:42,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:42,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-03-01 17:56:42,395 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 [2022-03-01 17:56:42,395 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:42,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1789169850, now seen corresponding path program 18 times [2022-03-01 17:56:42,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:42,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433660491] [2022-03-01 17:56:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:42,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:42,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433660491] [2022-03-01 17:56:42,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433660491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:42,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716536759] [2022-03-01 17:56:42,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:42,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:42,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:42,635 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:42,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-01 17:56:42,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:56:42,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:42,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:56:42,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:43,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:43,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:43,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:43,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2022-03-01 17:56:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:43,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:43,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:43,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:43,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:43,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:56:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:43,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716536759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:43,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:43,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:56:43,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29190896] [2022-03-01 17:56:43,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:43,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:56:43,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:43,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:56:43,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:56:43,851 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) [2022-03-01 17:56:45,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:45,435 INFO L93 Difference]: Finished difference Result 2816 states and 8947 transitions. [2022-03-01 17:56:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:56:45,435 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 [2022-03-01 17:56:45,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:45,440 INFO L225 Difference]: With dead ends: 2816 [2022-03-01 17:56:45,440 INFO L226 Difference]: Without dead ends: 2810 [2022-03-01 17:56:45,440 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 [2022-03-01 17:56:45,440 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 [2022-03-01 17:56:45,440 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] [2022-03-01 17:56:45,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2022-03-01 17:56:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 2155. [2022-03-01 17:56:45,464 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) [2022-03-01 17:56:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 7083 transitions. [2022-03-01 17:56:45,468 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 7083 transitions. Word has length 24 [2022-03-01 17:56:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:45,468 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 7083 transitions. [2022-03-01 17:56:45,468 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) [2022-03-01 17:56:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 7083 transitions. [2022-03-01 17:56:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:45,471 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:45,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:45,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-01 17:56:45,671 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 [2022-03-01 17:56:45,671 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:45,671 INFO L85 PathProgramCache]: Analyzing trace with hash 319872101, now seen corresponding path program 102 times [2022-03-01 17:56:45,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:45,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146331430] [2022-03-01 17:56:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:45,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:45,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:45,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146331430] [2022-03-01 17:56:45,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146331430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:45,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137447423] [2022-03-01 17:56:45,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:45,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:45,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:45,932 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:45,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-01 17:56:45,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:56:45,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:45,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:45,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:46,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:46,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:46,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:56:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:46,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:46,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:46,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:47,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:47,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:56:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:47,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137447423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:47,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:47,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:56:47,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905304609] [2022-03-01 17:56:47,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:47,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:56:47,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:47,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:56:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:56:47,131 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) [2022-03-01 17:56:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:49,472 INFO L93 Difference]: Finished difference Result 3178 states and 10559 transitions. [2022-03-01 17:56:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 17:56:49,472 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 [2022-03-01 17:56:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:49,478 INFO L225 Difference]: With dead ends: 3178 [2022-03-01 17:56:49,478 INFO L226 Difference]: Without dead ends: 3163 [2022-03-01 17:56:49,478 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 [2022-03-01 17:56:49,478 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 [2022-03-01 17:56:49,478 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] [2022-03-01 17:56:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2022-03-01 17:56:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 2173. [2022-03-01 17:56:49,506 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) [2022-03-01 17:56:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 7147 transitions. [2022-03-01 17:56:49,528 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 7147 transitions. Word has length 24 [2022-03-01 17:56:49,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:49,528 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 7147 transitions. [2022-03-01 17:56:49,528 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) [2022-03-01 17:56:49,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 7147 transitions. [2022-03-01 17:56:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:49,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:49,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:49,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-01 17:56:49,733 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 [2022-03-01 17:56:49,733 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:49,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:49,734 INFO L85 PathProgramCache]: Analyzing trace with hash 448954820, now seen corresponding path program 16 times [2022-03-01 17:56:49,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:49,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470653771] [2022-03-01 17:56:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:49,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:49,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:49,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470653771] [2022-03-01 17:56:49,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470653771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:49,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50605396] [2022-03-01 17:56:49,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:49,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:49,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:49,986 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:49,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-01 17:56:50,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:50,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:50,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:50,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:50,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:50,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:50,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:50,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:56:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:50,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:50,597 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:56:50,597 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:56:50,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:50,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:50,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:50,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:50,654 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 20 treesize of output 3 [2022-03-01 17:56:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:50,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50605396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:50,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:50,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:50,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267263166] [2022-03-01 17:56:50,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:50,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:50,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:50,671 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) [2022-03-01 17:56:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:51,868 INFO L93 Difference]: Finished difference Result 2465 states and 8079 transitions. [2022-03-01 17:56:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:56:51,868 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 [2022-03-01 17:56:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:51,873 INFO L225 Difference]: With dead ends: 2465 [2022-03-01 17:56:51,873 INFO L226 Difference]: Without dead ends: 2458 [2022-03-01 17:56:51,873 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 [2022-03-01 17:56:51,873 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 [2022-03-01 17:56:51,873 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] [2022-03-01 17:56:51,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-03-01 17:56:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2167. [2022-03-01 17:56:51,898 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) [2022-03-01 17:56:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7126 transitions. [2022-03-01 17:56:51,902 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7126 transitions. Word has length 24 [2022-03-01 17:56:51,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:51,902 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 7126 transitions. [2022-03-01 17:56:51,902 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) [2022-03-01 17:56:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7126 transitions. [2022-03-01 17:56:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:51,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:51,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:51,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-01 17:56:52,105 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 [2022-03-01 17:56:52,105 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:52,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:52,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1299422423, now seen corresponding path program 103 times [2022-03-01 17:56:52,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:52,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304397733] [2022-03-01 17:56:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:52,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:52,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:52,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304397733] [2022-03-01 17:56:52,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304397733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:52,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147690178] [2022-03-01 17:56:52,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:52,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:52,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:52,371 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:52,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-01 17:56:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:52,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:56:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:52,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:52,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:52,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:52,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:52,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:56:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:52,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:52,980 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:56:52,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:56:53,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:53,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:53,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:56:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:53,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147690178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:53,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:53,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:56:53,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104427854] [2022-03-01 17:56:53,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:53,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:56:53,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:53,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:56:53,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:56:53,050 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) [2022-03-01 17:56:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:54,285 INFO L93 Difference]: Finished difference Result 2554 states and 8369 transitions. [2022-03-01 17:56:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:56:54,285 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 [2022-03-01 17:56:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:54,290 INFO L225 Difference]: With dead ends: 2554 [2022-03-01 17:56:54,290 INFO L226 Difference]: Without dead ends: 2544 [2022-03-01 17:56:54,290 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 [2022-03-01 17:56:54,290 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 [2022-03-01 17:56:54,290 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] [2022-03-01 17:56:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-03-01 17:56:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2169. [2022-03-01 17:56:54,318 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) [2022-03-01 17:56:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 7132 transitions. [2022-03-01 17:56:54,322 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 7132 transitions. Word has length 24 [2022-03-01 17:56:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:54,322 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 7132 transitions. [2022-03-01 17:56:54,322 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) [2022-03-01 17:56:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 7132 transitions. [2022-03-01 17:56:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:56:54,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:54,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:54,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-03-01 17:56:54,525 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 [2022-03-01 17:56:54,525 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:56:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash -999955525, now seen corresponding path program 104 times [2022-03-01 17:56:54,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:54,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517181191] [2022-03-01 17:56:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:54,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:54,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:54,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517181191] [2022-03-01 17:56:54,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517181191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:54,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37614500] [2022-03-01 17:56:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:54,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:54,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:54,794 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:54,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-01 17:56:54,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:54,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:56:54,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:55,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:55,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:55,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:55,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:55,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:56:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:55,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:55,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:55,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:55,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:55,869 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 [2022-03-01 17:56:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:56,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37614500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:56,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:56,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:56:56,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884630413] [2022-03-01 17:56:56,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:56,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:56:56,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:56,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:56:56,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:56:56,026 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) [2022-03-01 17:57:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:00,379 INFO L93 Difference]: Finished difference Result 3653 states and 12342 transitions. [2022-03-01 17:57:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 17:57:00,379 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 [2022-03-01 17:57:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:00,385 INFO L225 Difference]: With dead ends: 3653 [2022-03-01 17:57:00,385 INFO L226 Difference]: Without dead ends: 3646 [2022-03-01 17:57:00,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=660, Invalid=5346, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 17:57:00,386 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 [2022-03-01 17:57:00,386 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] [2022-03-01 17:57:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2022-03-01 17:57:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 2188. [2022-03-01 17:57:00,414 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) [2022-03-01 17:57:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 7221 transitions. [2022-03-01 17:57:00,418 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 7221 transitions. Word has length 24 [2022-03-01 17:57:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:00,418 INFO L470 AbstractCegarLoop]: Abstraction has 2188 states and 7221 transitions. [2022-03-01 17:57:00,418 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) [2022-03-01 17:57:00,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 7221 transitions. [2022-03-01 17:57:00,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:00,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:00,421 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] [2022-03-01 17:57:00,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:00,621 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 [2022-03-01 17:57:00,621 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:00,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:00,621 INFO L85 PathProgramCache]: Analyzing trace with hash 925650051, now seen corresponding path program 105 times [2022-03-01 17:57:00,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:00,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365436018] [2022-03-01 17:57:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:00,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:00,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:00,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365436018] [2022-03-01 17:57:00,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365436018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:00,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038121120] [2022-03-01 17:57:00,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:00,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:00,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:00,862 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:00,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-01 17:57:00,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:57:00,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:00,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:00,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:01,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:01,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:01,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:01,209 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 33 treesize of output 21 [2022-03-01 17:57:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:01,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:01,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:01,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:01,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:57:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:01,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038121120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:01,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:01,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:57:01,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229141777] [2022-03-01 17:57:01,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:01,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:57:01,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:57:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:57:01,746 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) [2022-03-01 17:57:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:03,662 INFO L93 Difference]: Finished difference Result 2585 states and 8416 transitions. [2022-03-01 17:57:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:57:03,662 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 [2022-03-01 17:57:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:03,667 INFO L225 Difference]: With dead ends: 2585 [2022-03-01 17:57:03,667 INFO L226 Difference]: Without dead ends: 2579 [2022-03-01 17:57:03,667 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 [2022-03-01 17:57:03,667 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 [2022-03-01 17:57:03,667 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] [2022-03-01 17:57:03,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2022-03-01 17:57:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 2194. [2022-03-01 17:57:03,691 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) [2022-03-01 17:57:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 7247 transitions. [2022-03-01 17:57:03,694 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 7247 transitions. Word has length 24 [2022-03-01 17:57:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:03,695 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 7247 transitions. [2022-03-01 17:57:03,695 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) [2022-03-01 17:57:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 7247 transitions. [2022-03-01 17:57:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:03,697 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:03,697 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:03,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-03-01 17:57:03,898 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 [2022-03-01 17:57:03,898 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:03,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2054445773, now seen corresponding path program 106 times [2022-03-01 17:57:03,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:03,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341983083] [2022-03-01 17:57:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:03,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:04,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:04,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341983083] [2022-03-01 17:57:04,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341983083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:04,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918041669] [2022-03-01 17:57:04,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:04,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:04,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:04,114 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:04,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-01 17:57:04,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:04,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:04,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:04,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:04,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:04,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:57:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:04,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:04,744 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:57:04,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:57:04,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:04,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:04,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:57:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:04,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918041669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:04,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:04,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:57:04,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083499465] [2022-03-01 17:57:04,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:04,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:57:04,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:04,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:57:04,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:57:04,806 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) [2022-03-01 17:57:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:06,066 INFO L93 Difference]: Finished difference Result 2561 states and 8346 transitions. [2022-03-01 17:57:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:57:06,066 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 [2022-03-01 17:57:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:06,071 INFO L225 Difference]: With dead ends: 2561 [2022-03-01 17:57:06,071 INFO L226 Difference]: Without dead ends: 2554 [2022-03-01 17:57:06,072 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 [2022-03-01 17:57:06,072 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 [2022-03-01 17:57:06,072 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] [2022-03-01 17:57:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2022-03-01 17:57:06,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2200. [2022-03-01 17:57:06,107 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) [2022-03-01 17:57:06,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 7262 transitions. [2022-03-01 17:57:06,111 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 7262 transitions. Word has length 24 [2022-03-01 17:57:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:06,111 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 7262 transitions. [2022-03-01 17:57:06,111 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) [2022-03-01 17:57:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 7262 transitions. [2022-03-01 17:57:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:06,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:06,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:06,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-01 17:57:06,314 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 [2022-03-01 17:57:06,315 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:06,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:06,315 INFO L85 PathProgramCache]: Analyzing trace with hash 976075949, now seen corresponding path program 107 times [2022-03-01 17:57:06,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:06,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340514087] [2022-03-01 17:57:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:06,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:06,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:06,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340514087] [2022-03-01 17:57:06,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340514087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:06,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498874189] [2022-03-01 17:57:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:06,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:06,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:06,530 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:06,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-01 17:57:06,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:57:06,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:06,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:06,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:06,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:06,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:06,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:06,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:57:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:06,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:07,158 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:57:07,158 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:57:07,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:07,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:07,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:07,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:57:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:07,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498874189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:07,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:07,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:57:07,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350729706] [2022-03-01 17:57:07,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:07,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:57:07,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:07,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:57:07,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:57:07,238 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) [2022-03-01 17:57:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:08,529 INFO L93 Difference]: Finished difference Result 2566 states and 8345 transitions. [2022-03-01 17:57:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:57:08,529 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 [2022-03-01 17:57:08,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:08,534 INFO L225 Difference]: With dead ends: 2566 [2022-03-01 17:57:08,534 INFO L226 Difference]: Without dead ends: 2564 [2022-03-01 17:57:08,534 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 [2022-03-01 17:57:08,535 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 [2022-03-01 17:57:08,535 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] [2022-03-01 17:57:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-03-01 17:57:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 2200. [2022-03-01 17:57:08,570 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) [2022-03-01 17:57:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 7262 transitions. [2022-03-01 17:57:08,574 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 7262 transitions. Word has length 24 [2022-03-01 17:57:08,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:08,574 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 7262 transitions. [2022-03-01 17:57:08,574 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) [2022-03-01 17:57:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 7262 transitions. [2022-03-01 17:57:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:08,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:08,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:08,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-01 17:57:08,777 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 [2022-03-01 17:57:08,777 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:08,778 INFO L85 PathProgramCache]: Analyzing trace with hash -679235281, now seen corresponding path program 108 times [2022-03-01 17:57:08,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:08,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440127148] [2022-03-01 17:57:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:08,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:09,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:09,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440127148] [2022-03-01 17:57:09,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440127148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:09,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758860880] [2022-03-01 17:57:09,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:09,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:09,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:09,013 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:09,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-01 17:57:09,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:57:09,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:09,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:57:09,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:09,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:09,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:09,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:09,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:57:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:09,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:10,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:10,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:10,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:10,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:10,198 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2022-03-01 17:57:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:10,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758860880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:10,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:10,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 17:57:10,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429216797] [2022-03-01 17:57:10,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:10,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:57:10,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:10,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:57:10,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:57:10,241 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) [2022-03-01 17:57:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:14,315 INFO L93 Difference]: Finished difference Result 3532 states and 11623 transitions. [2022-03-01 17:57:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-01 17:57:14,315 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 [2022-03-01 17:57:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:14,321 INFO L225 Difference]: With dead ends: 3532 [2022-03-01 17:57:14,321 INFO L226 Difference]: Without dead ends: 3521 [2022-03-01 17:57:14,322 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 [2022-03-01 17:57:14,322 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 [2022-03-01 17:57:14,322 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] [2022-03-01 17:57:14,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2022-03-01 17:57:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2256. [2022-03-01 17:57:14,351 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) [2022-03-01 17:57:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7403 transitions. [2022-03-01 17:57:14,355 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7403 transitions. Word has length 24 [2022-03-01 17:57:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:14,355 INFO L470 AbstractCegarLoop]: Abstraction has 2256 states and 7403 transitions. [2022-03-01 17:57:14,355 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) [2022-03-01 17:57:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7403 transitions. [2022-03-01 17:57:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:14,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:14,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:14,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-03-01 17:57:14,558 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 [2022-03-01 17:57:14,558 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:14,559 INFO L85 PathProgramCache]: Analyzing trace with hash 443570164, now seen corresponding path program 19 times [2022-03-01 17:57:14,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:14,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686436120] [2022-03-01 17:57:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:14,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:14,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:14,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686436120] [2022-03-01 17:57:14,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686436120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:14,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211576956] [2022-03-01 17:57:14,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:14,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:14,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:14,776 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:14,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-01 17:57:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:14,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:15,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:15,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:15,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:15,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:15,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:57:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:15,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:15,407 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:57:15,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:57:15,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:15,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:15,459 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 20 treesize of output 3 [2022-03-01 17:57:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:15,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211576956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:15,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:15,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:57:15,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458932421] [2022-03-01 17:57:15,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:15,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:57:15,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:15,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:57:15,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:57:15,478 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) [2022-03-01 17:57:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:16,590 INFO L93 Difference]: Finished difference Result 2774 states and 8963 transitions. [2022-03-01 17:57:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:57:16,591 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 [2022-03-01 17:57:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:16,595 INFO L225 Difference]: With dead ends: 2774 [2022-03-01 17:57:16,595 INFO L226 Difference]: Without dead ends: 2767 [2022-03-01 17:57:16,596 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 [2022-03-01 17:57:16,596 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 [2022-03-01 17:57:16,596 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] [2022-03-01 17:57:16,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2022-03-01 17:57:16,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2254. [2022-03-01 17:57:16,625 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) [2022-03-01 17:57:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 7400 transitions. [2022-03-01 17:57:16,629 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 7400 transitions. Word has length 24 [2022-03-01 17:57:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:16,629 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 7400 transitions. [2022-03-01 17:57:16,629 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) [2022-03-01 17:57:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 7400 transitions. [2022-03-01 17:57:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:16,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:16,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:16,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-01 17:57:16,833 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 [2022-03-01 17:57:16,833 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:16,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:16,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1659991413, now seen corresponding path program 109 times [2022-03-01 17:57:16,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:16,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526888944] [2022-03-01 17:57:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:16,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:17,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:17,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526888944] [2022-03-01 17:57:17,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526888944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:17,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90649902] [2022-03-01 17:57:17,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:17,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:17,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:17,076 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:17,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-01 17:57:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:17,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:17,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:17,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:17,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:17,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:17,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:57:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:17,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:17,677 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:57:17,678 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:57:17,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:17,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:17,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:17,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:17,721 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:57:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:17,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90649902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:17,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:17,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:57:17,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093700947] [2022-03-01 17:57:17,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:17,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:57:17,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:57:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:57:17,738 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) [2022-03-01 17:57:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:18,535 INFO L93 Difference]: Finished difference Result 2643 states and 8605 transitions. [2022-03-01 17:57:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:57:18,535 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 [2022-03-01 17:57:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:18,540 INFO L225 Difference]: With dead ends: 2643 [2022-03-01 17:57:18,540 INFO L226 Difference]: Without dead ends: 2637 [2022-03-01 17:57:18,540 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 [2022-03-01 17:57:18,540 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:18,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 133 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1156 Invalid, 0 Unknown, 1088 Unchecked, 0.4s Time] [2022-03-01 17:57:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2022-03-01 17:57:18,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2232. [2022-03-01 17:57:18,578 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) [2022-03-01 17:57:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 7342 transitions. [2022-03-01 17:57:18,582 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 7342 transitions. Word has length 24 [2022-03-01 17:57:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:18,582 INFO L470 AbstractCegarLoop]: Abstraction has 2232 states and 7342 transitions. [2022-03-01 17:57:18,582 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) [2022-03-01 17:57:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 7342 transitions. [2022-03-01 17:57:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:18,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:18,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:18,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-03-01 17:57:18,785 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 [2022-03-01 17:57:18,786 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:18,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:18,786 INFO L85 PathProgramCache]: Analyzing trace with hash -22424909, now seen corresponding path program 110 times [2022-03-01 17:57:18,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:18,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459533071] [2022-03-01 17:57:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:18,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:19,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:19,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459533071] [2022-03-01 17:57:19,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459533071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:19,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567215525] [2022-03-01 17:57:19,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:19,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:19,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:19,059 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:19,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-01 17:57:19,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:19,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:19,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:19,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:19,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:19,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:19,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:57:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:19,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:19,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:19,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:19,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:19,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:19,946 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 [2022-03-01 17:57:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:20,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567215525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:20,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:20,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 28 [2022-03-01 17:57:20,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262034010] [2022-03-01 17:57:20,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:20,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:57:20,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:20,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:57:20,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:57:20,036 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) [2022-03-01 17:57:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:20,854 INFO L93 Difference]: Finished difference Result 2702 states and 8810 transitions. [2022-03-01 17:57:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:57:20,854 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 [2022-03-01 17:57:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:20,858 INFO L225 Difference]: With dead ends: 2702 [2022-03-01 17:57:20,858 INFO L226 Difference]: Without dead ends: 2690 [2022-03-01 17:57:20,858 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 [2022-03-01 17:57:20,859 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 [2022-03-01 17:57:20,859 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] [2022-03-01 17:57:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2022-03-01 17:57:20,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2249. [2022-03-01 17:57:20,883 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) [2022-03-01 17:57:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 7395 transitions. [2022-03-01 17:57:20,887 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 7395 transitions. Word has length 24 [2022-03-01 17:57:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:20,887 INFO L470 AbstractCegarLoop]: Abstraction has 2249 states and 7395 transitions. [2022-03-01 17:57:20,887 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) [2022-03-01 17:57:20,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 7395 transitions. [2022-03-01 17:57:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:20,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:20,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:20,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-03-01 17:57:21,091 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 [2022-03-01 17:57:21,091 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1339655707, now seen corresponding path program 111 times [2022-03-01 17:57:21,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:21,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917059794] [2022-03-01 17:57:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:21,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:21,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:21,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917059794] [2022-03-01 17:57:21,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917059794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:21,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037528035] [2022-03-01 17:57:21,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:21,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:21,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:21,416 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:21,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-01 17:57:21,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:57:21,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:21,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:21,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:21,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:21,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:21,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:57:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:22,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:22,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:22,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:22,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:22,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:22,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:57:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:22,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037528035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:22,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:22,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:57:22,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763937436] [2022-03-01 17:57:22,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:22,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:57:22,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:22,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:57:22,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:57:22,593 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) [2022-03-01 17:57:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:26,868 INFO L93 Difference]: Finished difference Result 3092 states and 9920 transitions. [2022-03-01 17:57:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-01 17:57:26,868 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 [2022-03-01 17:57:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:26,873 INFO L225 Difference]: With dead ends: 3092 [2022-03-01 17:57:26,874 INFO L226 Difference]: Without dead ends: 3072 [2022-03-01 17:57:26,874 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 [2022-03-01 17:57:26,874 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 [2022-03-01 17:57:26,874 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] [2022-03-01 17:57:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2022-03-01 17:57:26,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2263. [2022-03-01 17:57:26,902 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) [2022-03-01 17:57:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7451 transitions. [2022-03-01 17:57:26,906 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7451 transitions. Word has length 24 [2022-03-01 17:57:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:26,906 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7451 transitions. [2022-03-01 17:57:26,906 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) [2022-03-01 17:57:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7451 transitions. [2022-03-01 17:57:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:26,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:26,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:26,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-01 17:57:27,110 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 [2022-03-01 17:57:27,110 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:27,110 INFO L85 PathProgramCache]: Analyzing trace with hash -299419909, now seen corresponding path program 112 times [2022-03-01 17:57:27,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:27,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87679145] [2022-03-01 17:57:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:27,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:27,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:27,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87679145] [2022-03-01 17:57:27,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87679145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:27,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912272064] [2022-03-01 17:57:27,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:27,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:27,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:27,405 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:27,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-01 17:57:27,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:27,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:27,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:27,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:27,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:27,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:27,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:27,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:57:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:27,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:27,966 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:57:27,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:57:28,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:28,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:28,013 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 20 treesize of output 3 [2022-03-01 17:57:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:28,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912272064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:28,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:28,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:57:28,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025088112] [2022-03-01 17:57:28,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:28,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:57:28,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:57:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:57:28,030 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) [2022-03-01 17:57:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:29,089 INFO L93 Difference]: Finished difference Result 2531 states and 8331 transitions. [2022-03-01 17:57:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:57:29,090 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 [2022-03-01 17:57:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:29,094 INFO L225 Difference]: With dead ends: 2531 [2022-03-01 17:57:29,094 INFO L226 Difference]: Without dead ends: 2524 [2022-03-01 17:57:29,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:57:29,094 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 [2022-03-01 17:57:29,094 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] [2022-03-01 17:57:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2022-03-01 17:57:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2265. [2022-03-01 17:57:29,117 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) [2022-03-01 17:57:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 7455 transitions. [2022-03-01 17:57:29,121 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 7455 transitions. Word has length 24 [2022-03-01 17:57:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:29,121 INFO L470 AbstractCegarLoop]: Abstraction has 2265 states and 7455 transitions. [2022-03-01 17:57:29,121 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) [2022-03-01 17:57:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 7455 transitions. [2022-03-01 17:57:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:29,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:29,124 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:29,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:29,325 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 [2022-03-01 17:57:29,325 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:29,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1133158349, now seen corresponding path program 113 times [2022-03-01 17:57:29,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:29,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123655474] [2022-03-01 17:57:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:29,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:29,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:29,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123655474] [2022-03-01 17:57:29,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123655474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:29,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783658956] [2022-03-01 17:57:29,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:29,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:29,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:29,578 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:29,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-01 17:57:29,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:57:29,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:29,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:29,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:29,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:29,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:29,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:29,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2022-03-01 17:57:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:30,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:30,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:30,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:30,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:30,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:57:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:30,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783658956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:30,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:30,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:57:30,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540937114] [2022-03-01 17:57:30,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:30,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:57:30,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:57:30,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:57:30,767 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) [2022-03-01 17:57:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:31,832 INFO L93 Difference]: Finished difference Result 2355 states and 7699 transitions. [2022-03-01 17:57:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:57:31,832 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 [2022-03-01 17:57:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:31,837 INFO L225 Difference]: With dead ends: 2355 [2022-03-01 17:57:31,837 INFO L226 Difference]: Without dead ends: 2353 [2022-03-01 17:57:31,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:57:31,837 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 [2022-03-01 17:57:31,837 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] [2022-03-01 17:57:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2022-03-01 17:57:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2274. [2022-03-01 17:57:31,860 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) [2022-03-01 17:57:31,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 7482 transitions. [2022-03-01 17:57:31,864 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 7482 transitions. Word has length 24 [2022-03-01 17:57:31,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:31,864 INFO L470 AbstractCegarLoop]: Abstraction has 2274 states and 7482 transitions. [2022-03-01 17:57:31,864 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) [2022-03-01 17:57:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 7482 transitions. [2022-03-01 17:57:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:31,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:31,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:31,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-01 17:57:32,067 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 [2022-03-01 17:57:32,068 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:32,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1149245489, now seen corresponding path program 114 times [2022-03-01 17:57:32,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:32,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145841900] [2022-03-01 17:57:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:32,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:32,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145841900] [2022-03-01 17:57:32,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145841900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:32,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874216048] [2022-03-01 17:57:32,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:32,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:32,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:32,358 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:32,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-01 17:57:32,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:57:32,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:32,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:32,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:32,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:32,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:32,639 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-01 17:57:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:32,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:33,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:33,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:57:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:33,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874216048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:33,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:33,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:57:33,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936700027] [2022-03-01 17:57:33,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:33,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:57:33,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:33,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:57:33,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:57:33,390 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) [2022-03-01 17:57:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:34,892 INFO L93 Difference]: Finished difference Result 2560 states and 8385 transitions. [2022-03-01 17:57:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:57:34,892 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 [2022-03-01 17:57:34,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:34,897 INFO L225 Difference]: With dead ends: 2560 [2022-03-01 17:57:34,897 INFO L226 Difference]: Without dead ends: 2551 [2022-03-01 17:57:34,897 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 [2022-03-01 17:57:34,897 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 [2022-03-01 17:57:34,897 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] [2022-03-01 17:57:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2022-03-01 17:57:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2279. [2022-03-01 17:57:34,920 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) [2022-03-01 17:57:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 7492 transitions. [2022-03-01 17:57:34,942 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 7492 transitions. Word has length 24 [2022-03-01 17:57:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:34,942 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 7492 transitions. [2022-03-01 17:57:34,942 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) [2022-03-01 17:57:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 7492 transitions. [2022-03-01 17:57:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:34,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:34,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:34,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-01 17:57:35,145 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 [2022-03-01 17:57:35,145 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:35,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash -97756617, now seen corresponding path program 115 times [2022-03-01 17:57:35,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:35,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836238951] [2022-03-01 17:57:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:35,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:35,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:35,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836238951] [2022-03-01 17:57:35,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836238951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:35,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67719872] [2022-03-01 17:57:35,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:35,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:35,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:35,438 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:35,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-01 17:57:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:35,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:35,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:35,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:35,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:35,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:35,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:35,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:57:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:35,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:36,035 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:57:36,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:57:36,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:36,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:36,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:36,090 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 [2022-03-01 17:57:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:36,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67719872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:36,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:36,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:57:36,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496100854] [2022-03-01 17:57:36,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:36,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:57:36,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:36,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:57:36,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:57:36,108 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) [2022-03-01 17:57:37,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:37,289 INFO L93 Difference]: Finished difference Result 2643 states and 8668 transitions. [2022-03-01 17:57:37,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:57:37,289 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 [2022-03-01 17:57:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:37,294 INFO L225 Difference]: With dead ends: 2643 [2022-03-01 17:57:37,294 INFO L226 Difference]: Without dead ends: 2639 [2022-03-01 17:57:37,294 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 [2022-03-01 17:57:37,294 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 [2022-03-01 17:57:37,294 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] [2022-03-01 17:57:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2022-03-01 17:57:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2298. [2022-03-01 17:57:37,317 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) [2022-03-01 17:57:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 7549 transitions. [2022-03-01 17:57:37,321 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 7549 transitions. Word has length 24 [2022-03-01 17:57:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:37,321 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 7549 transitions. [2022-03-01 17:57:37,321 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) [2022-03-01 17:57:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 7549 transitions. [2022-03-01 17:57:37,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:37,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:37,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:37,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:37,524 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 [2022-03-01 17:57:37,524 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash 789747064, now seen corresponding path program 20 times [2022-03-01 17:57:37,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:37,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768526475] [2022-03-01 17:57:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:37,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:37,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:37,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768526475] [2022-03-01 17:57:37,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768526475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:37,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957691498] [2022-03-01 17:57:37,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:37,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:37,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:37,829 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:37,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-01 17:57:37,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:37,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:37,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:37,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:38,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:38,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:38,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:57:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:38,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:38,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:38,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:38,793 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 [2022-03-01 17:57:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:38,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957691498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:38,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:38,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:57:38,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751186864] [2022-03-01 17:57:38,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:38,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:57:38,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:57:38,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:57:38,912 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) [2022-03-01 17:57:40,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:40,580 INFO L93 Difference]: Finished difference Result 2580 states and 8443 transitions. [2022-03-01 17:57:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:57:40,581 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 [2022-03-01 17:57:40,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:40,585 INFO L225 Difference]: With dead ends: 2580 [2022-03-01 17:57:40,585 INFO L226 Difference]: Without dead ends: 2572 [2022-03-01 17:57:40,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=269, Invalid=2181, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:57:40,585 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 [2022-03-01 17:57:40,586 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] [2022-03-01 17:57:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-03-01 17:57:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2299. [2022-03-01 17:57:40,610 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) [2022-03-01 17:57:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 7553 transitions. [2022-03-01 17:57:40,614 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 7553 transitions. Word has length 24 [2022-03-01 17:57:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:40,615 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 7553 transitions. [2022-03-01 17:57:40,615 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) [2022-03-01 17:57:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 7553 transitions. [2022-03-01 17:57:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:40,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:40,617 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] [2022-03-01 17:57:40,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-01 17:57:40,818 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 [2022-03-01 17:57:40,818 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash -836912765, now seen corresponding path program 116 times [2022-03-01 17:57:40,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:40,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761091910] [2022-03-01 17:57:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:40,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:41,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:41,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761091910] [2022-03-01 17:57:41,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761091910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:41,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870477336] [2022-03-01 17:57:41,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:41,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:41,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:41,111 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:41,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-01 17:57:41,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:41,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:41,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:41,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:41,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:41,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:41,400 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-01 17:57:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:41,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:41,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:41,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:41,990 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 [2022-03-01 17:57:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:42,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870477336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:42,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:42,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:57:42,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049642526] [2022-03-01 17:57:42,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:42,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:57:42,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:57:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:57:42,100 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) [2022-03-01 17:57:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:43,408 INFO L93 Difference]: Finished difference Result 2549 states and 8360 transitions. [2022-03-01 17:57:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:57:43,409 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 [2022-03-01 17:57:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:43,413 INFO L225 Difference]: With dead ends: 2549 [2022-03-01 17:57:43,413 INFO L226 Difference]: Without dead ends: 2542 [2022-03-01 17:57:43,413 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 [2022-03-01 17:57:43,414 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 [2022-03-01 17:57:43,414 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] [2022-03-01 17:57:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2022-03-01 17:57:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2302. [2022-03-01 17:57:43,440 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) [2022-03-01 17:57:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 7561 transitions. [2022-03-01 17:57:43,444 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 7561 transitions. Word has length 24 [2022-03-01 17:57:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:43,444 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 7561 transitions. [2022-03-01 17:57:43,444 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) [2022-03-01 17:57:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 7561 transitions. [2022-03-01 17:57:43,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:43,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:43,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:43,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:43,648 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 [2022-03-01 17:57:43,648 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:43,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:43,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1670651205, now seen corresponding path program 117 times [2022-03-01 17:57:43,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:43,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405473054] [2022-03-01 17:57:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:43,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:43,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:43,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405473054] [2022-03-01 17:57:43,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405473054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:43,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919438554] [2022-03-01 17:57:43,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:43,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:43,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:43,926 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:43,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-01 17:57:43,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:57:43,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:43,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:57:43,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:44,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:44,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:44,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:44,195 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 [2022-03-01 17:57:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:44,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:45,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:45,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:45,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:45,509 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 [2022-03-01 17:57:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:45,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919438554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:45,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:45,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-01 17:57:45,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8141188] [2022-03-01 17:57:45,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:45,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:57:45,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:45,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:57:45,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:57:45,684 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) [2022-03-01 17:57:48,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:48,706 INFO L93 Difference]: Finished difference Result 2576 states and 8306 transitions. [2022-03-01 17:57:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 17:57:48,706 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 [2022-03-01 17:57:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:48,710 INFO L225 Difference]: With dead ends: 2576 [2022-03-01 17:57:48,710 INFO L226 Difference]: Without dead ends: 2537 [2022-03-01 17:57:48,711 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 [2022-03-01 17:57:48,711 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 [2022-03-01 17:57:48,711 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] [2022-03-01 17:57:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-03-01 17:57:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2314. [2022-03-01 17:57:48,734 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) [2022-03-01 17:57:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 7595 transitions. [2022-03-01 17:57:48,738 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 7595 transitions. Word has length 24 [2022-03-01 17:57:48,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:48,738 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 7595 transitions. [2022-03-01 17:57:48,738 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) [2022-03-01 17:57:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 7595 transitions. [2022-03-01 17:57:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:48,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:48,741 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:48,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-03-01 17:57:48,942 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 [2022-03-01 17:57:48,942 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:48,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:48,942 INFO L85 PathProgramCache]: Analyzing trace with hash -335916765, now seen corresponding path program 118 times [2022-03-01 17:57:48,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:48,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848481630] [2022-03-01 17:57:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:48,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:49,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:49,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848481630] [2022-03-01 17:57:49,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848481630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:49,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357759533] [2022-03-01 17:57:49,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:49,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:49,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:49,211 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:49,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-01 17:57:49,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:49,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:49,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:49,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:49,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:49,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:49,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:49,458 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 17:57:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:49,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:49,776 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:57:49,776 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:57:49,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:49,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:49,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:49,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:49,827 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 20 treesize of output 3 [2022-03-01 17:57:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:49,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357759533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:49,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:49,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:57:49,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098456219] [2022-03-01 17:57:49,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:49,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:57:49,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:49,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:57:49,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:57:49,845 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) [2022-03-01 17:57:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:51,270 INFO L93 Difference]: Finished difference Result 2761 states and 9036 transitions. [2022-03-01 17:57:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:57:51,270 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 [2022-03-01 17:57:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:51,277 INFO L225 Difference]: With dead ends: 2761 [2022-03-01 17:57:51,277 INFO L226 Difference]: Without dead ends: 2743 [2022-03-01 17:57:51,278 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 [2022-03-01 17:57:51,278 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 [2022-03-01 17:57:51,278 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] [2022-03-01 17:57:51,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2022-03-01 17:57:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2344. [2022-03-01 17:57:51,313 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) [2022-03-01 17:57:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7727 transitions. [2022-03-01 17:57:51,320 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7727 transitions. Word has length 24 [2022-03-01 17:57:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:51,320 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 7727 transitions. [2022-03-01 17:57:51,320 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) [2022-03-01 17:57:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7727 transitions. [2022-03-01 17:57:51,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:51,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:51,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:51,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-03-01 17:57:51,539 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 [2022-03-01 17:57:51,539 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:51,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:51,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1370690325, now seen corresponding path program 119 times [2022-03-01 17:57:51,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:51,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142422080] [2022-03-01 17:57:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:51,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:51,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:51,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142422080] [2022-03-01 17:57:51,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142422080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:51,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807591397] [2022-03-01 17:57:51,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:51,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:51,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:51,840 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:51,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-01 17:57:51,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:57:51,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:51,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:51,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:52,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:52,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:52,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:52,109 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 37 treesize of output 21 [2022-03-01 17:57:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:52,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:52,432 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:57:52,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:57:52,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:52,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:52,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:52,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:52,483 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 [2022-03-01 17:57:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:52,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807591397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:52,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:52,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:57:52,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348990562] [2022-03-01 17:57:52,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:52,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:57:52,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:52,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:57:52,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:57:52,500 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) [2022-03-01 17:57:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:54,093 INFO L93 Difference]: Finished difference Result 2736 states and 8917 transitions. [2022-03-01 17:57:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:57:54,094 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 [2022-03-01 17:57:54,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:54,099 INFO L225 Difference]: With dead ends: 2736 [2022-03-01 17:57:54,099 INFO L226 Difference]: Without dead ends: 2717 [2022-03-01 17:57:54,099 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 [2022-03-01 17:57:54,099 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 [2022-03-01 17:57:54,099 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] [2022-03-01 17:57:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2022-03-01 17:57:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2356. [2022-03-01 17:57:54,126 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) [2022-03-01 17:57:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 7772 transitions. [2022-03-01 17:57:54,130 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 7772 transitions. Word has length 24 [2022-03-01 17:57:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:54,130 INFO L470 AbstractCegarLoop]: Abstraction has 2356 states and 7772 transitions. [2022-03-01 17:57:54,130 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) [2022-03-01 17:57:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 7772 transitions. [2022-03-01 17:57:54,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:54,143 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:54,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:54,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-03-01 17:57:54,343 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 [2022-03-01 17:57:54,343 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:54,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2109846473, now seen corresponding path program 120 times [2022-03-01 17:57:54,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:54,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124945403] [2022-03-01 17:57:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:54,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:54,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:54,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124945403] [2022-03-01 17:57:54,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124945403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:54,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513310183] [2022-03-01 17:57:54,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:54,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:54,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:54,600 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:54,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-01 17:57:54,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:57:54,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:54,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:54,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:54,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:54,872 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-01 17:57:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:55,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:55,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:55,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:55,481 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 [2022-03-01 17:57:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:55,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513310183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:55,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:55,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:57:55,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986047830] [2022-03-01 17:57:55,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:55,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:57:55,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:57:55,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:57:55,585 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) [2022-03-01 17:57:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:56,878 INFO L93 Difference]: Finished difference Result 2620 states and 8615 transitions. [2022-03-01 17:57:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:57:56,878 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 [2022-03-01 17:57:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:56,882 INFO L225 Difference]: With dead ends: 2620 [2022-03-01 17:57:56,882 INFO L226 Difference]: Without dead ends: 2613 [2022-03-01 17:57:56,883 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 [2022-03-01 17:57:56,883 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 [2022-03-01 17:57:56,883 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] [2022-03-01 17:57:56,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2022-03-01 17:57:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2357. [2022-03-01 17:57:56,908 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) [2022-03-01 17:57:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 7774 transitions. [2022-03-01 17:57:56,912 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 7774 transitions. Word has length 24 [2022-03-01 17:57:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:56,912 INFO L470 AbstractCegarLoop]: Abstraction has 2357 states and 7774 transitions. [2022-03-01 17:57:56,912 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) [2022-03-01 17:57:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 7774 transitions. [2022-03-01 17:57:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:56,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:56,915 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] [2022-03-01 17:57:56,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-03-01 17:57:57,115 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 [2022-03-01 17:57:57,115 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:57,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1351382383, now seen corresponding path program 121 times [2022-03-01 17:57:57,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:57,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074066014] [2022-03-01 17:57:57,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:57,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:57,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:57,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074066014] [2022-03-01 17:57:57,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074066014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:57,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966857353] [2022-03-01 17:57:57,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:57,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:57,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:57,418 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:57,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-01 17:57:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:57,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:57:57,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:57,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:57,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:57,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:57,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:57,650 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 34 treesize of output 20 [2022-03-01 17:57:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:57,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:57,992 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:57:57,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:57:58,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:58,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:58,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:58,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:58,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:57:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:58,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966857353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:58,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:58,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:57:58,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059834738] [2022-03-01 17:57:58,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:58,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:57:58,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:58,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:57:58,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:57:58,064 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) [2022-03-01 17:57:59,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:59,285 INFO L93 Difference]: Finished difference Result 2680 states and 8841 transitions. [2022-03-01 17:57:59,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:57:59,286 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 [2022-03-01 17:57:59,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:59,290 INFO L225 Difference]: With dead ends: 2680 [2022-03-01 17:57:59,291 INFO L226 Difference]: Without dead ends: 2665 [2022-03-01 17:57:59,291 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 [2022-03-01 17:57:59,291 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 [2022-03-01 17:57:59,291 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] [2022-03-01 17:57:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2022-03-01 17:57:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2367. [2022-03-01 17:57:59,328 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) [2022-03-01 17:57:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 7814 transitions. [2022-03-01 17:57:59,332 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 7814 transitions. Word has length 24 [2022-03-01 17:57:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:59,333 INFO L470 AbstractCegarLoop]: Abstraction has 2367 states and 7814 transitions. [2022-03-01 17:57:59,333 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) [2022-03-01 17:57:59,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 7814 transitions. [2022-03-01 17:57:59,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:57:59,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:59,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:59,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-03-01 17:57:59,536 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 [2022-03-01 17:57:59,536 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:57:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:59,536 INFO L85 PathProgramCache]: Analyzing trace with hash -906129461, now seen corresponding path program 122 times [2022-03-01 17:57:59,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:59,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452852618] [2022-03-01 17:57:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:59,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:59,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:59,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452852618] [2022-03-01 17:57:59,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452852618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:59,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218579501] [2022-03-01 17:57:59,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:59,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:59,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:59,782 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:59,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-01 17:57:59,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:59,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:59,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:57:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:00,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:00,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:00,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:58:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:00,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:00,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:00,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:58:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:00,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218579501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:00,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:00,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:58:00,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25340909] [2022-03-01 17:58:00,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:00,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:58:00,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:58:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:58:00,743 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) [2022-03-01 17:58:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:01,797 INFO L93 Difference]: Finished difference Result 2581 states and 8508 transitions. [2022-03-01 17:58:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:58:01,798 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 [2022-03-01 17:58:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:01,802 INFO L225 Difference]: With dead ends: 2581 [2022-03-01 17:58:01,802 INFO L226 Difference]: Without dead ends: 2575 [2022-03-01 17:58:01,802 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 [2022-03-01 17:58:01,802 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 [2022-03-01 17:58:01,802 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] [2022-03-01 17:58:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2022-03-01 17:58:01,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 2371. [2022-03-01 17:58:01,826 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) [2022-03-01 17:58:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 7831 transitions. [2022-03-01 17:58:01,830 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 7831 transitions. Word has length 24 [2022-03-01 17:58:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:01,830 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 7831 transitions. [2022-03-01 17:58:01,830 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) [2022-03-01 17:58:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 7831 transitions. [2022-03-01 17:58:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:01,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:01,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:01,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-01 17:58:02,035 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 [2022-03-01 17:58:02,035 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1986637321, now seen corresponding path program 123 times [2022-03-01 17:58:02,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:02,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157977972] [2022-03-01 17:58:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:02,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:02,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:02,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157977972] [2022-03-01 17:58:02,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157977972] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:02,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820130715] [2022-03-01 17:58:02,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:02,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:02,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:02,274 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:02,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-01 17:58:02,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:58:02,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:02,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:02,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:02,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:02,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:02,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:02,510 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 [2022-03-01 17:58:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:02,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:03,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:03,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:03,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:03,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:03,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:58:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:03,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820130715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:03,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:03,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-01 17:58:03,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835270128] [2022-03-01 17:58:03,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:03,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:58:03,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:58:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:58:03,350 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) [2022-03-01 17:58:06,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:06,156 INFO L93 Difference]: Finished difference Result 3227 states and 10485 transitions. [2022-03-01 17:58:06,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:58:06,156 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 [2022-03-01 17:58:06,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:06,162 INFO L225 Difference]: With dead ends: 3227 [2022-03-01 17:58:06,162 INFO L226 Difference]: Without dead ends: 3207 [2022-03-01 17:58:06,162 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 [2022-03-01 17:58:06,162 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:06,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 114 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2015 Invalid, 0 Unknown, 891 Unchecked, 0.9s Time] [2022-03-01 17:58:06,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-01 17:58:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 2400. [2022-03-01 17:58:06,190 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) [2022-03-01 17:58:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 7926 transitions. [2022-03-01 17:58:06,194 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 7926 transitions. Word has length 24 [2022-03-01 17:58:06,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:06,194 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 7926 transitions. [2022-03-01 17:58:06,194 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) [2022-03-01 17:58:06,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 7926 transitions. [2022-03-01 17:58:06,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:06,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:06,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:06,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-01 17:58:06,398 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 [2022-03-01 17:58:06,398 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:06,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:06,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1846621901, now seen corresponding path program 124 times [2022-03-01 17:58:06,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:06,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824541867] [2022-03-01 17:58:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:06,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:06,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:06,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824541867] [2022-03-01 17:58:06,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824541867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:06,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626578298] [2022-03-01 17:58:06,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:06,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:06,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:06,657 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:06,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-01 17:58:06,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:06,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:06,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:06,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:06,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:06,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:06,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:06,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:06,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:07,207 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:58:07,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:58:07,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:07,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:07,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:07,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:07,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:07,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626578298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:07,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:07,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:58:07,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991025679] [2022-03-01 17:58:07,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:07,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:58:07,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:07,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:58:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:58:07,281 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) [2022-03-01 17:58:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:08,831 INFO L93 Difference]: Finished difference Result 2831 states and 9332 transitions. [2022-03-01 17:58:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:58:08,831 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 [2022-03-01 17:58:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:08,836 INFO L225 Difference]: With dead ends: 2831 [2022-03-01 17:58:08,836 INFO L226 Difference]: Without dead ends: 2813 [2022-03-01 17:58:08,836 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 [2022-03-01 17:58:08,836 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 [2022-03-01 17:58:08,836 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] [2022-03-01 17:58:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2022-03-01 17:58:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2436. [2022-03-01 17:58:08,862 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) [2022-03-01 17:58:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 8069 transitions. [2022-03-01 17:58:08,867 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 8069 transitions. Word has length 24 [2022-03-01 17:58:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:08,867 INFO L470 AbstractCegarLoop]: Abstraction has 2436 states and 8069 transitions. [2022-03-01 17:58:08,867 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) [2022-03-01 17:58:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 8069 transitions. [2022-03-01 17:58:08,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:08,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:08,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:08,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-01 17:58:09,070 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 [2022-03-01 17:58:09,070 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash -338560521, now seen corresponding path program 125 times [2022-03-01 17:58:09,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:09,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979958038] [2022-03-01 17:58:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:09,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:09,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:09,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979958038] [2022-03-01 17:58:09,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979958038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:09,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196916969] [2022-03-01 17:58:09,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:09,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:09,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:09,345 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:09,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-01 17:58:09,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:58:09,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:09,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:09,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:09,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:09,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:09,576 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 [2022-03-01 17:58:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:09,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:09,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:09,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:09,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:09,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:58:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:10,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196916969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:10,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:10,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-03-01 17:58:10,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886122653] [2022-03-01 17:58:10,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:10,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:58:10,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:10,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:58:10,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:58:10,027 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) [2022-03-01 17:58:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:13,585 INFO L93 Difference]: Finished difference Result 3014 states and 9665 transitions. [2022-03-01 17:58:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 17:58:13,585 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 [2022-03-01 17:58:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:13,590 INFO L225 Difference]: With dead ends: 3014 [2022-03-01 17:58:13,590 INFO L226 Difference]: Without dead ends: 2999 [2022-03-01 17:58:13,591 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 [2022-03-01 17:58:13,591 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 [2022-03-01 17:58:13,591 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] [2022-03-01 17:58:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2022-03-01 17:58:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 2444. [2022-03-01 17:58:13,621 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) [2022-03-01 17:58:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 8103 transitions. [2022-03-01 17:58:13,626 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 8103 transitions. Word has length 24 [2022-03-01 17:58:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:13,626 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 8103 transitions. [2022-03-01 17:58:13,626 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) [2022-03-01 17:58:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 8103 transitions. [2022-03-01 17:58:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:13,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:13,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:13,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-03-01 17:58:13,829 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 [2022-03-01 17:58:13,829 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:13,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1851008737, now seen corresponding path program 126 times [2022-03-01 17:58:13,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:13,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196577748] [2022-03-01 17:58:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:13,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:14,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:14,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196577748] [2022-03-01 17:58:14,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196577748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:14,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019016984] [2022-03-01 17:58:14,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:14,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:14,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:14,083 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:14,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-01 17:58:14,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:58:14,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:58:14,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:14,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:14,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:14,335 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 26 treesize of output 32 [2022-03-01 17:58:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:14,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:14,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:14,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:14,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:58:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:15,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019016984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:15,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:15,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:58:15,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887121084] [2022-03-01 17:58:15,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:15,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:58:15,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:58:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:58:15,123 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) [2022-03-01 17:58:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:16,526 INFO L93 Difference]: Finished difference Result 2687 states and 8873 transitions. [2022-03-01 17:58:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:58:16,526 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 [2022-03-01 17:58:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:16,531 INFO L225 Difference]: With dead ends: 2687 [2022-03-01 17:58:16,531 INFO L226 Difference]: Without dead ends: 2673 [2022-03-01 17:58:16,531 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 [2022-03-01 17:58:16,531 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 [2022-03-01 17:58:16,531 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] [2022-03-01 17:58:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-03-01 17:58:16,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2448. [2022-03-01 17:58:16,555 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) [2022-03-01 17:58:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 8113 transitions. [2022-03-01 17:58:16,560 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 8113 transitions. Word has length 24 [2022-03-01 17:58:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:16,560 INFO L470 AbstractCegarLoop]: Abstraction has 2448 states and 8113 transitions. [2022-03-01 17:58:16,560 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) [2022-03-01 17:58:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 8113 transitions. [2022-03-01 17:58:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:16,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:16,563 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:16,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-03-01 17:58:16,763 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 [2022-03-01 17:58:16,763 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:16,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:16,764 INFO L85 PathProgramCache]: Analyzing trace with hash -66820087, now seen corresponding path program 127 times [2022-03-01 17:58:16,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:16,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945722919] [2022-03-01 17:58:16,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:16,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:17,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:17,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945722919] [2022-03-01 17:58:17,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945722919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:17,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901848624] [2022-03-01 17:58:17,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:17,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:17,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:17,010 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:17,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-01 17:58:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:17,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:17,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:17,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:17,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:17,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:17,581 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:58:17,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:58:17,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:17,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:17,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:17,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:58:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:17,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901848624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:17,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:17,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:58:17,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146013198] [2022-03-01 17:58:17,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:17,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:58:17,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:17,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:58:17,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:58:17,653 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) [2022-03-01 17:58:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:19,265 INFO L93 Difference]: Finished difference Result 2794 states and 9212 transitions. [2022-03-01 17:58:19,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:58:19,265 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 [2022-03-01 17:58:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:19,270 INFO L225 Difference]: With dead ends: 2794 [2022-03-01 17:58:19,270 INFO L226 Difference]: Without dead ends: 2777 [2022-03-01 17:58:19,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=282, Invalid=2474, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:58:19,270 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 [2022-03-01 17:58:19,270 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] [2022-03-01 17:58:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2022-03-01 17:58:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2474. [2022-03-01 17:58:19,296 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) [2022-03-01 17:58:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 8224 transitions. [2022-03-01 17:58:19,300 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 8224 transitions. Word has length 24 [2022-03-01 17:58:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:19,300 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 8224 transitions. [2022-03-01 17:58:19,300 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) [2022-03-01 17:58:19,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 8224 transitions. [2022-03-01 17:58:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:19,303 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:19,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:19,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-01 17:58:19,503 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 [2022-03-01 17:58:19,503 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1667257941, now seen corresponding path program 128 times [2022-03-01 17:58:19,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:19,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292527491] [2022-03-01 17:58:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:19,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:19,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:19,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292527491] [2022-03-01 17:58:19,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292527491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:19,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283481518] [2022-03-01 17:58:19,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:19,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:19,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:19,747 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:19,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-01 17:58:19,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:19,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:19,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:58:19,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:20,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:20,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:20,009 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-01 17:58:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:20,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:20,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:20,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:20,699 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 [2022-03-01 17:58:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:20,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283481518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:20,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:20,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:58:20,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089523781] [2022-03-01 17:58:20,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:20,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:58:20,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:20,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:58:20,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:58:20,789 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) [2022-03-01 17:58:22,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:22,111 INFO L93 Difference]: Finished difference Result 2838 states and 9378 transitions. [2022-03-01 17:58:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:58:22,112 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 [2022-03-01 17:58:22,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:22,117 INFO L225 Difference]: With dead ends: 2838 [2022-03-01 17:58:22,117 INFO L226 Difference]: Without dead ends: 2823 [2022-03-01 17:58:22,117 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 [2022-03-01 17:58:22,117 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 126 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2022-03-01 17:58:22,117 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] [2022-03-01 17:58:22,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-03-01 17:58:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2498. [2022-03-01 17:58:22,143 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) [2022-03-01 17:58:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 8313 transitions. [2022-03-01 17:58:22,148 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 8313 transitions. Word has length 24 [2022-03-01 17:58:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:22,148 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 8313 transitions. [2022-03-01 17:58:22,148 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) [2022-03-01 17:58:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 8313 transitions. [2022-03-01 17:58:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:22,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:22,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:22,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-01 17:58:22,351 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 [2022-03-01 17:58:22,352 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1534073149, now seen corresponding path program 129 times [2022-03-01 17:58:22,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:22,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429464840] [2022-03-01 17:58:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:22,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:22,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:22,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429464840] [2022-03-01 17:58:22,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429464840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:22,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751046255] [2022-03-01 17:58:22,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:22,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:22,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:22,603 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:22,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-01 17:58:22,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:58:22,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:22,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:58:22,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:22,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:22,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:22,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:22,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:23,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:23,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:23,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:23,402 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 [2022-03-01 17:58:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:23,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751046255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:23,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:23,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:58:23,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673939403] [2022-03-01 17:58:23,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:23,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:58:23,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:23,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:58:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:58:23,521 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) [2022-03-01 17:58:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:24,548 INFO L93 Difference]: Finished difference Result 2856 states and 9431 transitions. [2022-03-01 17:58:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:58:24,549 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 [2022-03-01 17:58:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:24,554 INFO L225 Difference]: With dead ends: 2856 [2022-03-01 17:58:24,554 INFO L226 Difference]: Without dead ends: 2850 [2022-03-01 17:58:24,554 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 [2022-03-01 17:58:24,554 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 [2022-03-01 17:58:24,554 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] [2022-03-01 17:58:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2022-03-01 17:58:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2500. [2022-03-01 17:58:24,580 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) [2022-03-01 17:58:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 8321 transitions. [2022-03-01 17:58:24,585 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 8321 transitions. Word has length 24 [2022-03-01 17:58:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:24,585 INFO L470 AbstractCegarLoop]: Abstraction has 2500 states and 8321 transitions. [2022-03-01 17:58:24,585 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) [2022-03-01 17:58:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 8321 transitions. [2022-03-01 17:58:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:24,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:24,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:24,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-01 17:58:24,788 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 [2022-03-01 17:58:24,788 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:24,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1436105503, now seen corresponding path program 130 times [2022-03-01 17:58:24,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:24,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940020426] [2022-03-01 17:58:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:24,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:25,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:25,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940020426] [2022-03-01 17:58:25,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940020426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:25,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484120893] [2022-03-01 17:58:25,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:25,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:25,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:25,053 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:25,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-01 17:58:25,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:25,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:25,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:25,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:25,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:25,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:25,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:25,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:25,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:25,657 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:58:25,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:58:25,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:25,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:25,715 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 20 treesize of output 3 [2022-03-01 17:58:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:25,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484120893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:25,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:25,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:58:25,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236270946] [2022-03-01 17:58:25,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:25,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:58:25,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:25,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:58:25,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:58:25,732 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) [2022-03-01 17:58:26,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:26,879 INFO L93 Difference]: Finished difference Result 2894 states and 9561 transitions. [2022-03-01 17:58:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:58:26,879 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 [2022-03-01 17:58:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:26,884 INFO L225 Difference]: With dead ends: 2894 [2022-03-01 17:58:26,884 INFO L226 Difference]: Without dead ends: 2886 [2022-03-01 17:58:26,884 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 [2022-03-01 17:58:26,884 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 [2022-03-01 17:58:26,884 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] [2022-03-01 17:58:26,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2022-03-01 17:58:26,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2501. [2022-03-01 17:58:26,910 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) [2022-03-01 17:58:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 8326 transitions. [2022-03-01 17:58:26,915 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 8326 transitions. Word has length 24 [2022-03-01 17:58:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:26,915 INFO L470 AbstractCegarLoop]: Abstraction has 2501 states and 8326 transitions. [2022-03-01 17:58:26,915 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) [2022-03-01 17:58:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 8326 transitions. [2022-03-01 17:58:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:26,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:26,918 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] [2022-03-01 17:58:26,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:27,118 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 [2022-03-01 17:58:27,119 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:27,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2084000377, now seen corresponding path program 131 times [2022-03-01 17:58:27,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:27,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261662850] [2022-03-01 17:58:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:27,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:27,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:27,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261662850] [2022-03-01 17:58:27,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261662850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:27,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088057986] [2022-03-01 17:58:27,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:27,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:27,416 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:27,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-01 17:58:27,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:58:27,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:27,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:27,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:27,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:27,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:27,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:27,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:27,759 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 [2022-03-01 17:58:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:27,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:28,096 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:58:28,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:58:28,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:28,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:28,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:28,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:28,150 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:58:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:28,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088057986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:28,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:28,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:58:28,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655294754] [2022-03-01 17:58:28,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:28,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:58:28,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:28,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:58:28,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:58:28,168 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) [2022-03-01 17:58:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:29,450 INFO L93 Difference]: Finished difference Result 3110 states and 10102 transitions. [2022-03-01 17:58:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:58:29,450 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 [2022-03-01 17:58:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:29,456 INFO L225 Difference]: With dead ends: 3110 [2022-03-01 17:58:29,456 INFO L226 Difference]: Without dead ends: 3101 [2022-03-01 17:58:29,456 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 [2022-03-01 17:58:29,456 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 [2022-03-01 17:58:29,456 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] [2022-03-01 17:58:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2022-03-01 17:58:29,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2505. [2022-03-01 17:58:29,483 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) [2022-03-01 17:58:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 8345 transitions. [2022-03-01 17:58:29,488 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 8345 transitions. Word has length 24 [2022-03-01 17:58:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:29,488 INFO L470 AbstractCegarLoop]: Abstraction has 2505 states and 8345 transitions. [2022-03-01 17:58:29,488 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) [2022-03-01 17:58:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 8345 transitions. [2022-03-01 17:58:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:29,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:29,491 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] [2022-03-01 17:58:29,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-03-01 17:58:29,691 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 [2022-03-01 17:58:29,691 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1481789116, now seen corresponding path program 17 times [2022-03-01 17:58:29,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:29,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907021277] [2022-03-01 17:58:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:29,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:29,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:29,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907021277] [2022-03-01 17:58:29,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907021277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:29,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518856892] [2022-03-01 17:58:29,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:29,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:29,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:29,933 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:29,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-01 17:58:29,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:58:29,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:29,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:30,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:30,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:30,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:30,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:30,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:30,546 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:58:30,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:58:30,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:30,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:30,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:30,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:30,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518856892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:30,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:30,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:58:30,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851357873] [2022-03-01 17:58:30,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:30,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:58:30,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:30,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:58:30,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:58:30,610 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) [2022-03-01 17:58:31,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:31,785 INFO L93 Difference]: Finished difference Result 2907 states and 9603 transitions. [2022-03-01 17:58:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:58:31,785 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 [2022-03-01 17:58:31,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:31,791 INFO L225 Difference]: With dead ends: 2907 [2022-03-01 17:58:31,791 INFO L226 Difference]: Without dead ends: 2900 [2022-03-01 17:58:31,791 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 [2022-03-01 17:58:31,791 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 [2022-03-01 17:58:31,791 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] [2022-03-01 17:58:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2022-03-01 17:58:31,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2503. [2022-03-01 17:58:31,829 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) [2022-03-01 17:58:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 8339 transitions. [2022-03-01 17:58:31,835 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 8339 transitions. Word has length 24 [2022-03-01 17:58:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:31,835 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 8339 transitions. [2022-03-01 17:58:31,835 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) [2022-03-01 17:58:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 8339 transitions. [2022-03-01 17:58:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:31,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:31,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:31,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-03-01 17:58:32,038 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 [2022-03-01 17:58:32,039 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:32,039 INFO L85 PathProgramCache]: Analyzing trace with hash 73429867, now seen corresponding path program 132 times [2022-03-01 17:58:32,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:32,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988638872] [2022-03-01 17:58:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:32,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:32,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:32,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988638872] [2022-03-01 17:58:32,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988638872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:32,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350702468] [2022-03-01 17:58:32,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:32,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:32,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:32,281 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:32,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-01 17:58:32,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:58:32,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:32,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 17:58:32,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:32,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:32,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:32,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:32,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:32,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2022-03-01 17:58:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:32,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:33,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:33,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:33,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:33,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:58:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:33,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350702468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:33,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:33,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:58:33,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492931293] [2022-03-01 17:58:33,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:33,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:58:33,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:33,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:58:33,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:58:33,654 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) [2022-03-01 17:58:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:35,678 INFO L93 Difference]: Finished difference Result 3159 states and 10415 transitions. [2022-03-01 17:58:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:58:35,678 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 [2022-03-01 17:58:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:35,684 INFO L225 Difference]: With dead ends: 3159 [2022-03-01 17:58:35,684 INFO L226 Difference]: Without dead ends: 3151 [2022-03-01 17:58:35,684 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 [2022-03-01 17:58:35,684 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 [2022-03-01 17:58:35,684 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] [2022-03-01 17:58:35,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2022-03-01 17:58:35,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2503. [2022-03-01 17:58:35,712 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) [2022-03-01 17:58:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 8339 transitions. [2022-03-01 17:58:35,716 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 8339 transitions. Word has length 24 [2022-03-01 17:58:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:35,716 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 8339 transitions. [2022-03-01 17:58:35,717 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) [2022-03-01 17:58:35,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 8339 transitions. [2022-03-01 17:58:35,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:35,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:35,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:35,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-03-01 17:58:35,920 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 [2022-03-01 17:58:35,920 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:35,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2115913133, now seen corresponding path program 133 times [2022-03-01 17:58:35,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:35,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911974090] [2022-03-01 17:58:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:35,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:36,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:36,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911974090] [2022-03-01 17:58:36,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911974090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:36,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436989089] [2022-03-01 17:58:36,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:36,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:36,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:36,174 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:36,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-01 17:58:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:36,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:36,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:36,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:36,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:36,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:36,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:58:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:36,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:36,807 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:58:36,808 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:58:36,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:36,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:36,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:36,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:36,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:36,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436989089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:36,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:36,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:58:36,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42180499] [2022-03-01 17:58:36,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:36,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:58:36,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:58:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:58:36,870 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) [2022-03-01 17:58:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:38,266 INFO L93 Difference]: Finished difference Result 3031 states and 9878 transitions. [2022-03-01 17:58:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:58:38,266 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 [2022-03-01 17:58:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:38,271 INFO L225 Difference]: With dead ends: 3031 [2022-03-01 17:58:38,271 INFO L226 Difference]: Without dead ends: 3024 [2022-03-01 17:58:38,271 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 [2022-03-01 17:58:38,271 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 [2022-03-01 17:58:38,271 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] [2022-03-01 17:58:38,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2022-03-01 17:58:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2486. [2022-03-01 17:58:38,299 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) [2022-03-01 17:58:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 8289 transitions. [2022-03-01 17:58:38,303 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 8289 transitions. Word has length 24 [2022-03-01 17:58:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:38,303 INFO L470 AbstractCegarLoop]: Abstraction has 2486 states and 8289 transitions. [2022-03-01 17:58:38,303 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) [2022-03-01 17:58:38,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 8289 transitions. [2022-03-01 17:58:38,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:38,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:38,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:38,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:38,507 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 [2022-03-01 17:58:38,507 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:38,507 INFO L85 PathProgramCache]: Analyzing trace with hash -284422353, now seen corresponding path program 134 times [2022-03-01 17:58:38,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:38,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057960782] [2022-03-01 17:58:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:38,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:38,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:38,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057960782] [2022-03-01 17:58:38,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057960782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:38,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058672145] [2022-03-01 17:58:38,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:38,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:38,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:38,771 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:38,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-01 17:58:38,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:38,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:38,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:58:38,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:39,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:39,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:39,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:39,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:58:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:39,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:39,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:39,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:39,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:39,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:58:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:40,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058672145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:40,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:40,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:58:40,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124481834] [2022-03-01 17:58:40,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:40,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:58:40,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:40,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:58:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:58:40,005 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) [2022-03-01 17:58:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:42,073 INFO L93 Difference]: Finished difference Result 3517 states and 11744 transitions. [2022-03-01 17:58:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:58:42,074 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 [2022-03-01 17:58:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:42,080 INFO L225 Difference]: With dead ends: 3517 [2022-03-01 17:58:42,080 INFO L226 Difference]: Without dead ends: 3513 [2022-03-01 17:58:42,080 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 [2022-03-01 17:58:42,080 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 [2022-03-01 17:58:42,081 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] [2022-03-01 17:58:42,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-03-01 17:58:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 2498. [2022-03-01 17:58:42,110 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) [2022-03-01 17:58:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 8330 transitions. [2022-03-01 17:58:42,115 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 8330 transitions. Word has length 24 [2022-03-01 17:58:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:42,115 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 8330 transitions. [2022-03-01 17:58:42,115 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) [2022-03-01 17:58:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 8330 transitions. [2022-03-01 17:58:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:42,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:42,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:42,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-01 17:58:42,318 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 [2022-03-01 17:58:42,319 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:42,319 INFO L85 PathProgramCache]: Analyzing trace with hash 603081328, now seen corresponding path program 21 times [2022-03-01 17:58:42,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:42,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160536518] [2022-03-01 17:58:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:42,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:42,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:42,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160536518] [2022-03-01 17:58:42,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160536518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:42,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891246559] [2022-03-01 17:58:42,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:42,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:42,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:42,561 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:42,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-01 17:58:42,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:58:42,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:42,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:58:42,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:42,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:42,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:42,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:42,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:42,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:42,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:43,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:43,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:43,364 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 [2022-03-01 17:58:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:43,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891246559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:43,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:43,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:58:43,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612098298] [2022-03-01 17:58:43,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:43,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:58:43,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:43,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:58:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:58:43,489 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) [2022-03-01 17:58:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:46,095 INFO L93 Difference]: Finished difference Result 3311 states and 10477 transitions. [2022-03-01 17:58:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:58:46,096 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 [2022-03-01 17:58:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:46,101 INFO L225 Difference]: With dead ends: 3311 [2022-03-01 17:58:46,102 INFO L226 Difference]: Without dead ends: 3279 [2022-03-01 17:58:46,102 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 [2022-03-01 17:58:46,102 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 [2022-03-01 17:58:46,102 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] [2022-03-01 17:58:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2022-03-01 17:58:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2547. [2022-03-01 17:58:46,142 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) [2022-03-01 17:58:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 8485 transitions. [2022-03-01 17:58:46,148 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 8485 transitions. Word has length 24 [2022-03-01 17:58:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:46,148 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 8485 transitions. [2022-03-01 17:58:46,148 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) [2022-03-01 17:58:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 8485 transitions. [2022-03-01 17:58:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:46,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:46,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:46,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-03-01 17:58:46,351 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 [2022-03-01 17:58:46,351 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:46,352 INFO L85 PathProgramCache]: Analyzing trace with hash 713052612, now seen corresponding path program 18 times [2022-03-01 17:58:46,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:46,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449073353] [2022-03-01 17:58:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:46,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:46,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:46,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449073353] [2022-03-01 17:58:46,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449073353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:46,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258089328] [2022-03-01 17:58:46,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:46,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:46,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:46,591 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:46,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-01 17:58:46,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:58:46,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:46,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:58:46,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:46,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:46,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:46,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:46,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:46,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:58:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:47,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:47,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:47,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:47,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:47,590 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 [2022-03-01 17:58:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:47,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258089328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:47,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:47,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:58:47,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335867213] [2022-03-01 17:58:47,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:47,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:58:47,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:47,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:58:47,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:58:47,726 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) [2022-03-01 17:58:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:50,260 INFO L93 Difference]: Finished difference Result 3638 states and 12393 transitions. [2022-03-01 17:58:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:58:50,260 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 [2022-03-01 17:58:50,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:50,267 INFO L225 Difference]: With dead ends: 3638 [2022-03-01 17:58:50,267 INFO L226 Difference]: Without dead ends: 3625 [2022-03-01 17:58:50,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=427, Invalid=3233, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 17:58:50,267 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 [2022-03-01 17:58:50,268 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] [2022-03-01 17:58:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2022-03-01 17:58:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 2574. [2022-03-01 17:58:50,299 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) [2022-03-01 17:58:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 8598 transitions. [2022-03-01 17:58:50,304 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 8598 transitions. Word has length 24 [2022-03-01 17:58:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:50,304 INFO L470 AbstractCegarLoop]: Abstraction has 2574 states and 8598 transitions. [2022-03-01 17:58:50,304 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) [2022-03-01 17:58:50,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 8598 transitions. [2022-03-01 17:58:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:50,307 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:50,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:50,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-01 17:58:50,508 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 [2022-03-01 17:58:50,508 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:50,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1363030483, now seen corresponding path program 135 times [2022-03-01 17:58:50,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:50,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523724792] [2022-03-01 17:58:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:50,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:50,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:50,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523724792] [2022-03-01 17:58:50,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523724792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:50,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023978910] [2022-03-01 17:58:50,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:50,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:50,763 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:50,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-01 17:58:50,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:58:50,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:50,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:50,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:51,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:51,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:51,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:51,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:51,076 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 33 treesize of output 17 [2022-03-01 17:58:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:51,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:51,368 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:58:51,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:58:51,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:51,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:51,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:51,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:51,422 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 20 treesize of output 3 [2022-03-01 17:58:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:51,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023978910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:51,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:51,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:58:51,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558821987] [2022-03-01 17:58:51,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:51,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:58:51,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:51,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:58:51,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:58:51,440 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) [2022-03-01 17:58:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:52,952 INFO L93 Difference]: Finished difference Result 3329 states and 10831 transitions. [2022-03-01 17:58:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:58:52,953 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 [2022-03-01 17:58:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:52,959 INFO L225 Difference]: With dead ends: 3329 [2022-03-01 17:58:52,959 INFO L226 Difference]: Without dead ends: 3319 [2022-03-01 17:58:52,959 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 [2022-03-01 17:58:52,959 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:52,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 255 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1763 Invalid, 0 Unknown, 689 Unchecked, 0.7s Time] [2022-03-01 17:58:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2022-03-01 17:58:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 2587. [2022-03-01 17:58:52,989 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) [2022-03-01 17:58:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8643 transitions. [2022-03-01 17:58:52,994 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8643 transitions. Word has length 24 [2022-03-01 17:58:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:52,994 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8643 transitions. [2022-03-01 17:58:52,994 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) [2022-03-01 17:58:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8643 transitions. [2022-03-01 17:58:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:52,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:52,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:53,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-03-01 17:58:53,198 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 [2022-03-01 17:58:53,198 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:53,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1170717186, now seen corresponding path program 19 times [2022-03-01 17:58:53,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:53,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231056561] [2022-03-01 17:58:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:53,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:53,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:53,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231056561] [2022-03-01 17:58:53,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231056561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:53,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441770376] [2022-03-01 17:58:53,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:53,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:53,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:53,451 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:53,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-01 17:58:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:53,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:53,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:53,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:53,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:53,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:53,731 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 [2022-03-01 17:58:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:53,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:54,071 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:58:54,071 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 [2022-03-01 17:58:54,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:54,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:54,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:54,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:54,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441770376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:54,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:54,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:58:54,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063305206] [2022-03-01 17:58:54,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:54,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:58:54,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:54,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:58:54,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:58:54,159 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) [2022-03-01 17:58:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:55,557 INFO L93 Difference]: Finished difference Result 3170 states and 10315 transitions. [2022-03-01 17:58:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:58:55,557 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 [2022-03-01 17:58:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:55,562 INFO L225 Difference]: With dead ends: 3170 [2022-03-01 17:58:55,562 INFO L226 Difference]: Without dead ends: 3162 [2022-03-01 17:58:55,563 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 [2022-03-01 17:58:55,563 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 [2022-03-01 17:58:55,563 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] [2022-03-01 17:58:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-03-01 17:58:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2577. [2022-03-01 17:58:55,591 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) [2022-03-01 17:58:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 8604 transitions. [2022-03-01 17:58:55,616 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 8604 transitions. Word has length 24 [2022-03-01 17:58:55,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:55,616 INFO L470 AbstractCegarLoop]: Abstraction has 2577 states and 8604 transitions. [2022-03-01 17:58:55,616 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) [2022-03-01 17:58:55,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 8604 transitions. [2022-03-01 17:58:55,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:55,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:55,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:55,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-01 17:58:55,820 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 [2022-03-01 17:58:55,820 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:55,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:55,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1867982233, now seen corresponding path program 136 times [2022-03-01 17:58:55,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:55,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171345797] [2022-03-01 17:58:55,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:55,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:56,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:56,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171345797] [2022-03-01 17:58:56,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171345797] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:56,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644425974] [2022-03-01 17:58:56,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:56,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:56,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:56,074 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:56,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-01 17:58:56,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:56,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:56,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:58:56,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:56,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:56,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:56,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:56,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:56,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:56,707 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:58:56,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:58:56,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:56,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:56,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:56,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:56,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:58:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:56,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644425974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:56,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:56,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:58:56,780 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512809288] [2022-03-01 17:58:56,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:56,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:58:56,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:58:56,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:58:56,781 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) [2022-03-01 17:58:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:58,328 INFO L93 Difference]: Finished difference Result 3205 states and 10398 transitions. [2022-03-01 17:58:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:58:58,329 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 [2022-03-01 17:58:58,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:58,334 INFO L225 Difference]: With dead ends: 3205 [2022-03-01 17:58:58,334 INFO L226 Difference]: Without dead ends: 3196 [2022-03-01 17:58:58,334 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 [2022-03-01 17:58:58,334 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 [2022-03-01 17:58:58,334 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] [2022-03-01 17:58:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2022-03-01 17:58:58,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2562. [2022-03-01 17:58:58,361 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) [2022-03-01 17:58:58,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 8551 transitions. [2022-03-01 17:58:58,366 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 8551 transitions. Word has length 24 [2022-03-01 17:58:58,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:58,366 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 8551 transitions. [2022-03-01 17:58:58,366 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) [2022-03-01 17:58:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 8551 transitions. [2022-03-01 17:58:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:58:58,369 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:58,369 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] [2022-03-01 17:58:58,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:58,569 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 [2022-03-01 17:58:58,569 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:58:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1738899514, now seen corresponding path program 20 times [2022-03-01 17:58:58,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:58,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374516947] [2022-03-01 17:58:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:58,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:58,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:58,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374516947] [2022-03-01 17:58:58,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374516947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:58,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644457358] [2022-03-01 17:58:58,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:58,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:58,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:58,821 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:58,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-01 17:58:58,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:58,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:58,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:58:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:59,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:59,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:59,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:59,142 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 17:58:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:59,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:59,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:59,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:59,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:59,904 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 [2022-03-01 17:58:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:59,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644457358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:59,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:59,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 17:58:59,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900262671] [2022-03-01 17:58:59,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:59,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:58:59,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:59,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:58:59,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:58:59,993 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) [2022-03-01 17:59:03,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:03,281 INFO L93 Difference]: Finished difference Result 3914 states and 13354 transitions. [2022-03-01 17:59:03,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 17:59:03,281 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 [2022-03-01 17:59:03,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:03,288 INFO L225 Difference]: With dead ends: 3914 [2022-03-01 17:59:03,289 INFO L226 Difference]: Without dead ends: 3907 [2022-03-01 17:59:03,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=571, Invalid=4121, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 17:59:03,289 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 [2022-03-01 17:59:03,289 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] [2022-03-01 17:59:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-03-01 17:59:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2586. [2022-03-01 17:59:03,323 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) [2022-03-01 17:59:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 8646 transitions. [2022-03-01 17:59:03,348 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 8646 transitions. Word has length 24 [2022-03-01 17:59:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:03,348 INFO L470 AbstractCegarLoop]: Abstraction has 2586 states and 8646 transitions. [2022-03-01 17:59:03,348 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) [2022-03-01 17:59:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 8646 transitions. [2022-03-01 17:59:03,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:03,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:03,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:03,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-03-01 17:59:03,551 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 [2022-03-01 17:59:03,552 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:03,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:03,552 INFO L85 PathProgramCache]: Analyzing trace with hash 957867473, now seen corresponding path program 137 times [2022-03-01 17:59:03,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:03,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433067617] [2022-03-01 17:59:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:03,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:03,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:03,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433067617] [2022-03-01 17:59:03,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433067617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:03,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375145618] [2022-03-01 17:59:03,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:03,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:03,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:03,806 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:03,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-01 17:59:03,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:59:03,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:03,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:04,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:04,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:04,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:59:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:04,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:04,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:04,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:04,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:04,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:04,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:59:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:04,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375145618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:04,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:04,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:59:04,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241837837] [2022-03-01 17:59:04,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:04,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:59:04,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:04,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:59:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:59:04,983 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) [2022-03-01 17:59:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:05,927 INFO L93 Difference]: Finished difference Result 2691 states and 8950 transitions. [2022-03-01 17:59:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:59:05,927 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 [2022-03-01 17:59:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:05,932 INFO L225 Difference]: With dead ends: 2691 [2022-03-01 17:59:05,932 INFO L226 Difference]: Without dead ends: 2684 [2022-03-01 17:59:05,932 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 [2022-03-01 17:59:05,932 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 [2022-03-01 17:59:05,933 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] [2022-03-01 17:59:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2022-03-01 17:59:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2587. [2022-03-01 17:59:05,958 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) [2022-03-01 17:59:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8647 transitions. [2022-03-01 17:59:05,963 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8647 transitions. Word has length 24 [2022-03-01 17:59:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:05,963 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8647 transitions. [2022-03-01 17:59:05,963 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) [2022-03-01 17:59:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8647 transitions. [2022-03-01 17:59:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:05,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:05,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:05,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:06,166 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 [2022-03-01 17:59:06,167 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1861458294, now seen corresponding path program 22 times [2022-03-01 17:59:06,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:06,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296842542] [2022-03-01 17:59:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:06,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:06,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:06,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296842542] [2022-03-01 17:59:06,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296842542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:06,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319913952] [2022-03-01 17:59:06,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:06,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:06,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:06,423 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:06,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-01 17:59:06,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:06,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:06,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:06,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:06,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:06,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:06,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:06,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:06,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-03-01 17:59:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:06,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:06,992 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:59:06,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:59:07,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:07,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:07,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:07,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:07,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:59:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:07,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319913952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:07,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:07,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:59:07,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345636291] [2022-03-01 17:59:07,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:07,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:59:07,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:07,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:59:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:59:07,065 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) [2022-03-01 17:59:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:08,152 INFO L93 Difference]: Finished difference Result 2853 states and 9514 transitions. [2022-03-01 17:59:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:59:08,152 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 [2022-03-01 17:59:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:08,157 INFO L225 Difference]: With dead ends: 2853 [2022-03-01 17:59:08,157 INFO L226 Difference]: Without dead ends: 2845 [2022-03-01 17:59:08,157 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 [2022-03-01 17:59:08,157 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 [2022-03-01 17:59:08,157 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] [2022-03-01 17:59:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2022-03-01 17:59:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2579. [2022-03-01 17:59:08,183 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) [2022-03-01 17:59:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 8618 transitions. [2022-03-01 17:59:08,187 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 8618 transitions. Word has length 24 [2022-03-01 17:59:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:08,187 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 8618 transitions. [2022-03-01 17:59:08,187 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) [2022-03-01 17:59:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 8618 transitions. [2022-03-01 17:59:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:08,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:08,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:08,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:08,391 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 [2022-03-01 17:59:08,391 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:08,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1245375153, now seen corresponding path program 138 times [2022-03-01 17:59:08,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:08,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325241185] [2022-03-01 17:59:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:08,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:08,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:08,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325241185] [2022-03-01 17:59:08,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325241185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:08,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733632056] [2022-03-01 17:59:08,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:08,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:08,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:08,658 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:08,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-01 17:59:08,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:59:08,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:08,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:08,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:08,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:08,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:08,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:59:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:09,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:09,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:09,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:09,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:59:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:09,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733632056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:09,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:09,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:59:09,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781721981] [2022-03-01 17:59:09,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:09,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:59:09,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:59:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:59:09,733 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) [2022-03-01 17:59:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:11,507 INFO L93 Difference]: Finished difference Result 2959 states and 9749 transitions. [2022-03-01 17:59:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:59:11,508 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 [2022-03-01 17:59:11,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:11,513 INFO L225 Difference]: With dead ends: 2959 [2022-03-01 17:59:11,513 INFO L226 Difference]: Without dead ends: 2948 [2022-03-01 17:59:11,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:59:11,513 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 [2022-03-01 17:59:11,513 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] [2022-03-01 17:59:11,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2022-03-01 17:59:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2588. [2022-03-01 17:59:11,547 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) [2022-03-01 17:59:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 8647 transitions. [2022-03-01 17:59:11,552 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 8647 transitions. Word has length 24 [2022-03-01 17:59:11,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:11,552 INFO L470 AbstractCegarLoop]: Abstraction has 2588 states and 8647 transitions. [2022-03-01 17:59:11,552 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) [2022-03-01 17:59:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 8647 transitions. [2022-03-01 17:59:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:11,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:11,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:11,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-03-01 17:59:11,756 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 [2022-03-01 17:59:11,756 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:11,757 INFO L85 PathProgramCache]: Analyzing trace with hash 436461757, now seen corresponding path program 139 times [2022-03-01 17:59:11,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:11,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197461448] [2022-03-01 17:59:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:11,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:12,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:12,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197461448] [2022-03-01 17:59:12,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197461448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:12,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793203330] [2022-03-01 17:59:12,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:59:12,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:12,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:12,034 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:12,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-01 17:59:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:12,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:12,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:12,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:12,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:12,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:12,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:59:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:12,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:12,603 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:59:12,603 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:59:12,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:12,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:12,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:59:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:12,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793203330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:12,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:12,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:59:12,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399891736] [2022-03-01 17:59:12,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:12,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:59:12,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:12,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:59:12,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:59:12,690 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) [2022-03-01 17:59:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:13,747 INFO L93 Difference]: Finished difference Result 2858 states and 9526 transitions. [2022-03-01 17:59:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:59:13,748 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 [2022-03-01 17:59:13,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:13,752 INFO L225 Difference]: With dead ends: 2858 [2022-03-01 17:59:13,752 INFO L226 Difference]: Without dead ends: 2850 [2022-03-01 17:59:13,753 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 [2022-03-01 17:59:13,753 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 [2022-03-01 17:59:13,753 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] [2022-03-01 17:59:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2022-03-01 17:59:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2587. [2022-03-01 17:59:13,779 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) [2022-03-01 17:59:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 8649 transitions. [2022-03-01 17:59:13,784 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 8649 transitions. Word has length 24 [2022-03-01 17:59:13,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:13,784 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 8649 transitions. [2022-03-01 17:59:13,785 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) [2022-03-01 17:59:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 8649 transitions. [2022-03-01 17:59:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:13,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:13,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:13,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-01 17:59:13,988 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 [2022-03-01 17:59:13,989 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:13,989 INFO L85 PathProgramCache]: Analyzing trace with hash -836471951, now seen corresponding path program 140 times [2022-03-01 17:59:13,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:13,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189220597] [2022-03-01 17:59:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:13,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:14,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:14,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189220597] [2022-03-01 17:59:14,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189220597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:14,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089433940] [2022-03-01 17:59:14,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:14,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:14,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:14,284 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:14,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-01 17:59:14,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:14,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:14,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:14,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:14,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:14,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:14,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:59:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:14,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:15,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:15,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:15,241 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 [2022-03-01 17:59:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:15,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089433940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:15,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:15,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:59:15,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309329271] [2022-03-01 17:59:15,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:15,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:59:15,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:15,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:59:15,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:59:15,350 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) [2022-03-01 17:59:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:17,530 INFO L93 Difference]: Finished difference Result 2909 states and 9613 transitions. [2022-03-01 17:59:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:59:17,530 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 [2022-03-01 17:59:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:17,536 INFO L225 Difference]: With dead ends: 2909 [2022-03-01 17:59:17,536 INFO L226 Difference]: Without dead ends: 2879 [2022-03-01 17:59:17,536 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 [2022-03-01 17:59:17,536 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2022-03-01 17:59:17,537 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] [2022-03-01 17:59:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-03-01 17:59:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2584. [2022-03-01 17:59:17,577 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) [2022-03-01 17:59:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 8638 transitions. [2022-03-01 17:59:17,582 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 8638 transitions. Word has length 24 [2022-03-01 17:59:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:17,582 INFO L470 AbstractCegarLoop]: Abstraction has 2584 states and 8638 transitions. [2022-03-01 17:59:17,582 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) [2022-03-01 17:59:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 8638 transitions. [2022-03-01 17:59:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:17,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:17,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:17,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-03-01 17:59:17,785 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 [2022-03-01 17:59:17,786 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:17,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1085292758, now seen corresponding path program 23 times [2022-03-01 17:59:17,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:17,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024295013] [2022-03-01 17:59:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:17,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:18,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:18,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024295013] [2022-03-01 17:59:18,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024295013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:18,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031486526] [2022-03-01 17:59:18,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:18,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:18,068 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:18,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-01 17:59:18,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:59:18,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:18,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:18,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:18,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:18,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:18,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:18,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:18,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:59:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:18,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:18,675 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:59:18,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:59:18,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:18,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:18,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:18,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:18,715 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 20 treesize of output 3 [2022-03-01 17:59:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:18,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031486526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:18,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:18,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:59:18,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187772308] [2022-03-01 17:59:18,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:18,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:59:18,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:59:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:59:18,732 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) [2022-03-01 17:59:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:20,195 INFO L93 Difference]: Finished difference Result 2900 states and 9639 transitions. [2022-03-01 17:59:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:59:20,195 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 [2022-03-01 17:59:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:20,200 INFO L225 Difference]: With dead ends: 2900 [2022-03-01 17:59:20,200 INFO L226 Difference]: Without dead ends: 2892 [2022-03-01 17:59:20,201 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 [2022-03-01 17:59:20,201 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:20,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 169 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1459 Invalid, 0 Unknown, 288 Unchecked, 0.6s Time] [2022-03-01 17:59:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2022-03-01 17:59:20,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2594. [2022-03-01 17:59:20,231 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) [2022-03-01 17:59:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 8677 transitions. [2022-03-01 17:59:20,236 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 8677 transitions. Word has length 24 [2022-03-01 17:59:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:20,236 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 8677 transitions. [2022-03-01 17:59:20,236 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) [2022-03-01 17:59:20,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 8677 transitions. [2022-03-01 17:59:20,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:20,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:20,239 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] [2022-03-01 17:59:20,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-03-01 17:59:20,440 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 [2022-03-01 17:59:20,440 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1238024875, now seen corresponding path program 141 times [2022-03-01 17:59:20,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:20,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070030401] [2022-03-01 17:59:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:20,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:20,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:20,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070030401] [2022-03-01 17:59:20,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070030401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:20,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939502012] [2022-03-01 17:59:20,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:20,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:20,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:20,718 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:20,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-01 17:59:20,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:59:20,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:20,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:20,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:20,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:20,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:20,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:20,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:59:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:21,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:21,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:21,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:21,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:21,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:59:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:21,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939502012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:21,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:21,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-01 17:59:21,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132160737] [2022-03-01 17:59:21,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:21,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:59:21,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:21,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:59:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:59:21,880 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) [2022-03-01 17:59:25,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:25,855 INFO L93 Difference]: Finished difference Result 3381 states and 11015 transitions. [2022-03-01 17:59:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 17:59:25,855 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 [2022-03-01 17:59:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:25,861 INFO L225 Difference]: With dead ends: 3381 [2022-03-01 17:59:25,861 INFO L226 Difference]: Without dead ends: 3357 [2022-03-01 17:59:25,862 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 [2022-03-01 17:59:25,862 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 [2022-03-01 17:59:25,862 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] [2022-03-01 17:59:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2022-03-01 17:59:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 2550. [2022-03-01 17:59:25,889 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) [2022-03-01 17:59:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8521 transitions. [2022-03-01 17:59:25,894 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8521 transitions. Word has length 24 [2022-03-01 17:59:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:25,894 INFO L470 AbstractCegarLoop]: Abstraction has 2550 states and 8521 transitions. [2022-03-01 17:59:25,894 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) [2022-03-01 17:59:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8521 transitions. [2022-03-01 17:59:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:25,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:25,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:25,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-03-01 17:59:26,098 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 [2022-03-01 17:59:26,098 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:26,098 INFO L85 PathProgramCache]: Analyzing trace with hash -525329485, now seen corresponding path program 142 times [2022-03-01 17:59:26,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:26,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750441595] [2022-03-01 17:59:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:26,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:26,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:26,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750441595] [2022-03-01 17:59:26,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750441595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:26,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256211788] [2022-03-01 17:59:26,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:26,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:26,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:26,373 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:26,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-01 17:59:26,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:26,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:26,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:26,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:26,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:26,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:26,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:26,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-03-01 17:59:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:26,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:26,949 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:59:26,949 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 [2022-03-01 17:59:27,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:27,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:27,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:27,003 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 20 treesize of output 3 [2022-03-01 17:59:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:27,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256211788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:27,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:27,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:59:27,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471395143] [2022-03-01 17:59:27,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:27,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:59:27,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:27,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:59:27,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:59:27,020 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) [2022-03-01 17:59:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:28,592 INFO L93 Difference]: Finished difference Result 2906 states and 9658 transitions. [2022-03-01 17:59:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:59:28,592 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 [2022-03-01 17:59:28,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:28,597 INFO L225 Difference]: With dead ends: 2906 [2022-03-01 17:59:28,597 INFO L226 Difference]: Without dead ends: 2887 [2022-03-01 17:59:28,597 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 [2022-03-01 17:59:28,598 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 [2022-03-01 17:59:28,598 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] [2022-03-01 17:59:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-03-01 17:59:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2563. [2022-03-01 17:59:28,625 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) [2022-03-01 17:59:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 8571 transitions. [2022-03-01 17:59:28,629 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 8571 transitions. Word has length 24 [2022-03-01 17:59:28,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:28,629 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 8571 transitions. [2022-03-01 17:59:28,629 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) [2022-03-01 17:59:28,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 8571 transitions. [2022-03-01 17:59:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:28,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:28,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:28,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-03-01 17:59:28,833 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 [2022-03-01 17:59:28,833 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:28,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1646928077, now seen corresponding path program 143 times [2022-03-01 17:59:28,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:28,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179724942] [2022-03-01 17:59:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:29,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:29,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179724942] [2022-03-01 17:59:29,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179724942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:29,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249662681] [2022-03-01 17:59:29,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:29,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:29,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:29,115 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:29,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-01 17:59:29,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:59:29,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:59:29,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:29,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:29,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:29,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:29,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:29,380 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 30 treesize of output 16 [2022-03-01 17:59:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:29,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:29,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:29,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:29,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:29,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:59:29,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:29,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:29,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:29,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:29,781 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 17:59:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:29,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249662681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:29,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:29,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:59:29,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678026615] [2022-03-01 17:59:29,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:29,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:59:29,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:29,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:59:29,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:59:29,831 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) [2022-03-01 17:59:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:36,860 INFO L93 Difference]: Finished difference Result 3604 states and 11373 transitions. [2022-03-01 17:59:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-01 17:59:36,860 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 [2022-03-01 17:59:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:36,866 INFO L225 Difference]: With dead ends: 3604 [2022-03-01 17:59:36,866 INFO L226 Difference]: Without dead ends: 3544 [2022-03-01 17:59:36,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4346 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1240, Invalid=12332, Unknown=0, NotChecked=0, Total=13572 [2022-03-01 17:59:36,867 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, 2.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:36,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 522 Invalid, 6728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 6540 Invalid, 0 Unknown, 32 Unchecked, 2.9s Time] [2022-03-01 17:59:36,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2022-03-01 17:59:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 2525. [2022-03-01 17:59:36,900 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) [2022-03-01 17:59:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2525 states to 2525 states and 8432 transitions. [2022-03-01 17:59:36,905 INFO L78 Accepts]: Start accepts. Automaton has 2525 states and 8432 transitions. Word has length 24 [2022-03-01 17:59:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:36,905 INFO L470 AbstractCegarLoop]: Abstraction has 2525 states and 8432 transitions. [2022-03-01 17:59:36,905 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) [2022-03-01 17:59:36,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2525 states and 8432 transitions. [2022-03-01 17:59:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:36,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:36,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:36,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-01 17:59:37,108 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 [2022-03-01 17:59:37,109 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1367037485, now seen corresponding path program 144 times [2022-03-01 17:59:37,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:37,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155753647] [2022-03-01 17:59:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:37,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:37,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:37,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155753647] [2022-03-01 17:59:37,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155753647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:37,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968093525] [2022-03-01 17:59:37,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:37,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:37,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:37,416 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:37,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-01 17:59:37,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:59:37,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:37,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:37,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:37,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:37,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:37,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:37,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:37,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:59:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:38,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:38,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:38,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:38,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:38,525 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 [2022-03-01 17:59:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:38,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968093525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:38,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:38,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:59:38,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776912781] [2022-03-01 17:59:38,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:38,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:59:38,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:59:38,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:59:38,608 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) [2022-03-01 17:59:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:40,803 INFO L93 Difference]: Finished difference Result 3768 states and 12835 transitions. [2022-03-01 17:59:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:59:40,803 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 [2022-03-01 17:59:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:40,810 INFO L225 Difference]: With dead ends: 3768 [2022-03-01 17:59:40,810 INFO L226 Difference]: Without dead ends: 3748 [2022-03-01 17:59:40,810 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 [2022-03-01 17:59:40,810 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 [2022-03-01 17:59:40,810 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] [2022-03-01 17:59:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2022-03-01 17:59:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 2537. [2022-03-01 17:59:40,841 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) [2022-03-01 17:59:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 8483 transitions. [2022-03-01 17:59:40,846 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 8483 transitions. Word has length 24 [2022-03-01 17:59:40,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:40,846 INFO L470 AbstractCegarLoop]: Abstraction has 2537 states and 8483 transitions. [2022-03-01 17:59:40,846 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) [2022-03-01 17:59:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 8483 transitions. [2022-03-01 17:59:40,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:40,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:40,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:40,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-01 17:59:41,050 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 [2022-03-01 17:59:41,050 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:41,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:41,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1427388839, now seen corresponding path program 145 times [2022-03-01 17:59:41,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:41,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632351871] [2022-03-01 17:59:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:41,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:41,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:41,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632351871] [2022-03-01 17:59:41,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632351871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:41,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675130318] [2022-03-01 17:59:41,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:59:41,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:41,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:41,298 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:41,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-01 17:59:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:41,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:41,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:41,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:41,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:41,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:59:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:41,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:41,859 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:59:41,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:59:41,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:41,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:41,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:41,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:59:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:41,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675130318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:41,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:41,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 17:59:41,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928625757] [2022-03-01 17:59:41,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:41,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:59:41,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:41,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:59:41,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:59:41,931 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) [2022-03-01 17:59:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:42,849 INFO L93 Difference]: Finished difference Result 2868 states and 9604 transitions. [2022-03-01 17:59:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:59:42,849 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 [2022-03-01 17:59:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:42,854 INFO L225 Difference]: With dead ends: 2868 [2022-03-01 17:59:42,854 INFO L226 Difference]: Without dead ends: 2864 [2022-03-01 17:59:42,854 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 [2022-03-01 17:59:42,854 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 [2022-03-01 17:59:42,854 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] [2022-03-01 17:59:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2022-03-01 17:59:42,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2570. [2022-03-01 17:59:42,887 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) [2022-03-01 17:59:42,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 8629 transitions. [2022-03-01 17:59:42,891 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 8629 transitions. Word has length 24 [2022-03-01 17:59:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:42,891 INFO L470 AbstractCegarLoop]: Abstraction has 2570 states and 8629 transitions. [2022-03-01 17:59:42,891 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) [2022-03-01 17:59:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 8629 transitions. [2022-03-01 17:59:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:42,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:42,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:42,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-01 17:59:43,095 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 [2022-03-01 17:59:43,095 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:43,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1456017990, now seen corresponding path program 24 times [2022-03-01 17:59:43,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:43,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188101542] [2022-03-01 17:59:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:43,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:43,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:43,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188101542] [2022-03-01 17:59:43,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188101542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:43,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664049252] [2022-03-01 17:59:43,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:43,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:43,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:43,335 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:43,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-01 17:59:43,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:59:43,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:43,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:43,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:43,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:43,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:43,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:43,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:43,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:59:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:43,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:44,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:44,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:44,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:44,322 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 42 treesize of output 57 [2022-03-01 17:59:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:44,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664049252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:44,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:44,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:59:44,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516763733] [2022-03-01 17:59:44,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:44,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:59:44,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:59:44,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:59:44,481 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) [2022-03-01 17:59:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:45,355 INFO L93 Difference]: Finished difference Result 2899 states and 9820 transitions. [2022-03-01 17:59:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:59:45,355 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 [2022-03-01 17:59:45,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:45,360 INFO L225 Difference]: With dead ends: 2899 [2022-03-01 17:59:45,360 INFO L226 Difference]: Without dead ends: 2893 [2022-03-01 17:59:45,360 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 [2022-03-01 17:59:45,361 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 [2022-03-01 17:59:45,361 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] [2022-03-01 17:59:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2022-03-01 17:59:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2582. [2022-03-01 17:59:45,386 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) [2022-03-01 17:59:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 8674 transitions. [2022-03-01 17:59:45,391 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 8674 transitions. Word has length 24 [2022-03-01 17:59:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:45,391 INFO L470 AbstractCegarLoop]: Abstraction has 2582 states and 8674 transitions. [2022-03-01 17:59:45,391 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) [2022-03-01 17:59:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 8674 transitions. [2022-03-01 17:59:45,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:45,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:45,394 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:45,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-03-01 17:59:45,594 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 [2022-03-01 17:59:45,594 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash -380065624, now seen corresponding path program 21 times [2022-03-01 17:59:45,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:45,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801840054] [2022-03-01 17:59:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:45,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:45,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:45,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801840054] [2022-03-01 17:59:45,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801840054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:45,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371089410] [2022-03-01 17:59:45,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:45,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:45,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:45,840 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:45,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-01 17:59:45,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:59:45,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:45,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:45,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:46,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:46,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:46,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:46,134 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 [2022-03-01 17:59:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:46,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:46,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:46,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:46,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:46,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:46,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:59:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:46,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371089410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:46,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:46,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-01 17:59:46,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808744742] [2022-03-01 17:59:46,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:46,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:59:46,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:59:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:59:46,868 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) [2022-03-01 17:59:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:50,568 INFO L93 Difference]: Finished difference Result 3767 states and 12249 transitions. [2022-03-01 17:59:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:59:50,568 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 [2022-03-01 17:59:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:50,575 INFO L225 Difference]: With dead ends: 3767 [2022-03-01 17:59:50,575 INFO L226 Difference]: Without dead ends: 3741 [2022-03-01 17:59:50,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=604, Invalid=4798, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 17:59:50,576 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 [2022-03-01 17:59:50,576 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] [2022-03-01 17:59:50,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2022-03-01 17:59:50,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 2620. [2022-03-01 17:59:50,615 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) [2022-03-01 17:59:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 8821 transitions. [2022-03-01 17:59:50,620 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 8821 transitions. Word has length 24 [2022-03-01 17:59:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:50,620 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 8821 transitions. [2022-03-01 17:59:50,620 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) [2022-03-01 17:59:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 8821 transitions. [2022-03-01 17:59:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:50,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:50,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:50,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-03-01 17:59:50,824 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 [2022-03-01 17:59:50,824 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2133522032, now seen corresponding path program 25 times [2022-03-01 17:59:50,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:50,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965034654] [2022-03-01 17:59:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:50,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:51,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:51,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965034654] [2022-03-01 17:59:51,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965034654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:51,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21419610] [2022-03-01 17:59:51,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:59:51,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:51,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:51,059 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:51,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-01 17:59:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:51,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:51,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:51,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:51,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:51,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:51,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:51,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 17:59:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:51,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:51,586 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:59:51,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 17:59:51,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:51,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:51,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:51,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:51,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:59:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:51,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21419610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:51,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:51,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-01 17:59:51,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314033180] [2022-03-01 17:59:51,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:51,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:59:51,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:59:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:59:51,657 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) [2022-03-01 17:59:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:53,015 INFO L93 Difference]: Finished difference Result 3004 states and 10039 transitions. [2022-03-01 17:59:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:59:53,015 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 [2022-03-01 17:59:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:53,020 INFO L225 Difference]: With dead ends: 3004 [2022-03-01 17:59:53,020 INFO L226 Difference]: Without dead ends: 2989 [2022-03-01 17:59:53,021 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 [2022-03-01 17:59:53,021 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 [2022-03-01 17:59:53,021 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] [2022-03-01 17:59:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2022-03-01 17:59:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2633. [2022-03-01 17:59:53,063 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) [2022-03-01 17:59:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 8863 transitions. [2022-03-01 17:59:53,068 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 8863 transitions. Word has length 24 [2022-03-01 17:59:53,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:53,068 INFO L470 AbstractCegarLoop]: Abstraction has 2633 states and 8863 transitions. [2022-03-01 17:59:53,068 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) [2022-03-01 17:59:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 8863 transitions. [2022-03-01 17:59:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:53,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:53,071 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] [2022-03-01 17:59:53,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-01 17:59:53,273 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 [2022-03-01 17:59:53,273 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1636225050, now seen corresponding path program 1 times [2022-03-01 17:59:53,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:53,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518742067] [2022-03-01 17:59:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:53,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:53,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:53,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518742067] [2022-03-01 17:59:53,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518742067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:53,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986372079] [2022-03-01 17:59:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:53,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:53,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:53,484 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:53,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-01 17:59:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:53,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:59:53,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:53,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:53,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:53,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:53,827 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 [2022-03-01 17:59:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:53,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:54,124 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 17:59:54,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 17:59:54,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:54,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:54,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:54,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:54,173 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 [2022-03-01 17:59:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:54,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986372079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:54,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:54,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 17:59:54,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985812676] [2022-03-01 17:59:54,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:54,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:59:54,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:54,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:59:54,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:59:54,191 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) [2022-03-01 17:59:55,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:55,854 INFO L93 Difference]: Finished difference Result 3345 states and 11076 transitions. [2022-03-01 17:59:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:59:55,854 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 [2022-03-01 17:59:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:55,860 INFO L225 Difference]: With dead ends: 3345 [2022-03-01 17:59:55,860 INFO L226 Difference]: Without dead ends: 3339 [2022-03-01 17:59:55,861 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 [2022-03-01 17:59:55,861 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 [2022-03-01 17:59:55,861 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] [2022-03-01 17:59:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-03-01 17:59:55,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2651. [2022-03-01 17:59:55,891 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) [2022-03-01 17:59:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 8908 transitions. [2022-03-01 17:59:55,896 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 8908 transitions. Word has length 24 [2022-03-01 17:59:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:55,896 INFO L470 AbstractCegarLoop]: Abstraction has 2651 states and 8908 transitions. [2022-03-01 17:59:55,896 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) [2022-03-01 17:59:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 8908 transitions. [2022-03-01 17:59:55,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:55,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:55,900 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] [2022-03-01 17:59:55,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-03-01 17:59:56,100 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 [2022-03-01 17:59:56,100 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash -517823038, now seen corresponding path program 2 times [2022-03-01 17:59:56,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:56,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631604147] [2022-03-01 17:59:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:56,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:56,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:56,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631604147] [2022-03-01 17:59:56,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631604147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:56,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959997215] [2022-03-01 17:59:56,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:56,313 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:56,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-01 17:59:56,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:56,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:56,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:56,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:56,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:56,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:56,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:56,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 17:59:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:56,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:57,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:57,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:57,262 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 [2022-03-01 17:59:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:57,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959997215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:57,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:57,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-01 17:59:57,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259020865] [2022-03-01 17:59:57,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:57,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:59:57,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:57,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:59:57,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:59:57,345 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) [2022-03-01 17:59:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:59,005 INFO L93 Difference]: Finished difference Result 3376 states and 11002 transitions. [2022-03-01 17:59:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 17:59:59,005 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 [2022-03-01 17:59:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:59,011 INFO L225 Difference]: With dead ends: 3376 [2022-03-01 17:59:59,011 INFO L226 Difference]: Without dead ends: 3352 [2022-03-01 17:59:59,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 17:59:59,012 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 [2022-03-01 17:59:59,012 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] [2022-03-01 17:59:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2022-03-01 17:59:59,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2676. [2022-03-01 17:59:59,056 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) [2022-03-01 17:59:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 8966 transitions. [2022-03-01 17:59:59,061 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 8966 transitions. Word has length 24 [2022-03-01 17:59:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:59,061 INFO L470 AbstractCegarLoop]: Abstraction has 2676 states and 8966 transitions. [2022-03-01 17:59:59,061 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) [2022-03-01 17:59:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 8966 transitions. [2022-03-01 17:59:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:59:59,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:59,064 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] [2022-03-01 17:59:59,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:59,264 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 [2022-03-01 17:59:59,264 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 17:59:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:59,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1782268612, now seen corresponding path program 3 times [2022-03-01 17:59:59,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:59,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235220407] [2022-03-01 17:59:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:59,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:59,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:59,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235220407] [2022-03-01 17:59:59,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235220407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:59,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410568654] [2022-03-01 17:59:59,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:59,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:59,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:59,479 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:59,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-01 17:59:59,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:59:59,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:59,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:59:59,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:59,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:59,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:59,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:59,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:59,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:00:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:00,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:00,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:00,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:00,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:00,560 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 [2022-03-01 18:00:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:00,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410568654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:00,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:00,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-01 18:00:00,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485533909] [2022-03-01 18:00:00,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:00,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:00:00,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:00,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:00:00,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:00:00,642 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) [2022-03-01 18:00:03,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:03,348 INFO L93 Difference]: Finished difference Result 4696 states and 15925 transitions. [2022-03-01 18:00:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 18:00:03,348 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 [2022-03-01 18:00:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:03,356 INFO L225 Difference]: With dead ends: 4696 [2022-03-01 18:00:03,356 INFO L226 Difference]: Without dead ends: 4691 [2022-03-01 18:00:03,357 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 [2022-03-01 18:00:03,357 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 [2022-03-01 18:00:03,357 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] [2022-03-01 18:00:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-03-01 18:00:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 2706. [2022-03-01 18:00:03,397 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) [2022-03-01 18:00:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 9044 transitions. [2022-03-01 18:00:03,402 INFO L78 Accepts]: Start accepts. Automaton has 2706 states and 9044 transitions. Word has length 24 [2022-03-01 18:00:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:03,402 INFO L470 AbstractCegarLoop]: Abstraction has 2706 states and 9044 transitions. [2022-03-01 18:00:03,402 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) [2022-03-01 18:00:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2706 states and 9044 transitions. [2022-03-01 18:00:03,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:03,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:03,405 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] [2022-03-01 18:00:03,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-01 18:00:03,605 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 [2022-03-01 18:00:03,606 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:03,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:03,606 INFO L85 PathProgramCache]: Analyzing trace with hash 857387454, now seen corresponding path program 4 times [2022-03-01 18:00:03,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:03,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473036384] [2022-03-01 18:00:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:03,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:03,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:03,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473036384] [2022-03-01 18:00:03,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473036384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:03,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213506810] [2022-03-01 18:00:03,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:00:03,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:03,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:03,824 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:03,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-01 18:00:03,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:00:03,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:03,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:03,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:04,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:04,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:04,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:04,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:04,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 18:00:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:04,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:04,413 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:00:04,413 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:00:04,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:04,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:04,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:04,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:04,469 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:00:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:04,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213506810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:04,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:04,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:00:04,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679346769] [2022-03-01 18:00:04,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:04,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:00:04,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:00:04,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:00:04,486 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) [2022-03-01 18:00:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:05,687 INFO L93 Difference]: Finished difference Result 3335 states and 10880 transitions. [2022-03-01 18:00:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:00:05,688 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 [2022-03-01 18:00:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:05,694 INFO L225 Difference]: With dead ends: 3335 [2022-03-01 18:00:05,694 INFO L226 Difference]: Without dead ends: 3331 [2022-03-01 18:00:05,694 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 [2022-03-01 18:00:05,694 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 [2022-03-01 18:00:05,694 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] [2022-03-01 18:00:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2022-03-01 18:00:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 2695. [2022-03-01 18:00:05,729 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) [2022-03-01 18:00:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9024 transitions. [2022-03-01 18:00:05,735 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9024 transitions. Word has length 24 [2022-03-01 18:00:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:05,735 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9024 transitions. [2022-03-01 18:00:05,735 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) [2022-03-01 18:00:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9024 transitions. [2022-03-01 18:00:05,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:05,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:05,738 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] [2022-03-01 18:00:05,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-01 18:00:05,938 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 [2022-03-01 18:00:05,939 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:05,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:05,939 INFO L85 PathProgramCache]: Analyzing trace with hash -735920548, now seen corresponding path program 5 times [2022-03-01 18:00:05,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:05,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98321145] [2022-03-01 18:00:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:05,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:06,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:06,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98321145] [2022-03-01 18:00:06,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98321145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:06,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180238196] [2022-03-01 18:00:06,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:00:06,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:06,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:06,146 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:06,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-01 18:00:06,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:00:06,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:06,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:06,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:06,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:06,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:06,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:06,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:06,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:00:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:06,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:06,778 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:00:06,778 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 [2022-03-01 18:00:06,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:06,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:06,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:06,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:06,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:00:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:06,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180238196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:06,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:06,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:00:06,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440507495] [2022-03-01 18:00:06,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:06,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:00:06,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:06,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:00:06,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:00:06,850 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) [2022-03-01 18:00:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:08,481 INFO L93 Difference]: Finished difference Result 3440 states and 11288 transitions. [2022-03-01 18:00:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:00:08,481 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 [2022-03-01 18:00:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:08,488 INFO L225 Difference]: With dead ends: 3440 [2022-03-01 18:00:08,488 INFO L226 Difference]: Without dead ends: 3435 [2022-03-01 18:00:08,489 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 [2022-03-01 18:00:08,489 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 [2022-03-01 18:00:08,489 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] [2022-03-01 18:00:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-03-01 18:00:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2700. [2022-03-01 18:00:08,537 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) [2022-03-01 18:00:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 9036 transitions. [2022-03-01 18:00:08,542 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 9036 transitions. Word has length 24 [2022-03-01 18:00:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:08,542 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 9036 transitions. [2022-03-01 18:00:08,542 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) [2022-03-01 18:00:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 9036 transitions. [2022-03-01 18:00:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:08,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:08,546 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] [2022-03-01 18:00:08,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-03-01 18:00:08,746 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 [2022-03-01 18:00:08,747 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:08,747 INFO L85 PathProgramCache]: Analyzing trace with hash -922618564, now seen corresponding path program 6 times [2022-03-01 18:00:08,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:08,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003540267] [2022-03-01 18:00:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:08,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:08,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:08,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003540267] [2022-03-01 18:00:08,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003540267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:08,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558391859] [2022-03-01 18:00:08,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:00:08,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:08,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:08,953 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:08,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-01 18:00:08,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:00:08,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:08,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:08,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:09,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:09,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:09,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:09,329 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 [2022-03-01 18:00:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:09,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:09,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:09,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:09,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:09,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:09,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:00:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:10,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558391859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:10,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:10,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 18:00:10,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056626331] [2022-03-01 18:00:10,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:10,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:00:10,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:10,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:00:10,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:00:10,013 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) [2022-03-01 18:00:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:14,393 INFO L93 Difference]: Finished difference Result 4885 states and 16240 transitions. [2022-03-01 18:00:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 18:00:14,394 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 [2022-03-01 18:00:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:14,403 INFO L225 Difference]: With dead ends: 4885 [2022-03-01 18:00:14,403 INFO L226 Difference]: Without dead ends: 4875 [2022-03-01 18:00:14,403 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 [2022-03-01 18:00:14,404 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 [2022-03-01 18:00:14,404 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] [2022-03-01 18:00:14,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-03-01 18:00:14,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 2715. [2022-03-01 18:00:14,452 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) [2022-03-01 18:00:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 9085 transitions. [2022-03-01 18:00:14,458 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 9085 transitions. Word has length 24 [2022-03-01 18:00:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:14,458 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 9085 transitions. [2022-03-01 18:00:14,458 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) [2022-03-01 18:00:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 9085 transitions. [2022-03-01 18:00:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:14,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:14,462 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] [2022-03-01 18:00:14,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-03-01 18:00:14,662 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 [2022-03-01 18:00:14,662 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:14,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1717037502, now seen corresponding path program 7 times [2022-03-01 18:00:14,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:14,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569326052] [2022-03-01 18:00:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:14,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:14,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:14,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569326052] [2022-03-01 18:00:14,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569326052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:14,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602837217] [2022-03-01 18:00:14,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:14,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:14,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:14,881 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:14,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-01 18:00:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:14,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:14,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:15,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:15,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:15,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:15,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 18:00:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:15,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:15,454 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:00:15,455 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:00:15,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:15,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:15,514 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 [2022-03-01 18:00:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:15,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602837217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:15,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:15,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:00:15,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775920968] [2022-03-01 18:00:15,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:15,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:00:15,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:15,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:00:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:00:15,532 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) [2022-03-01 18:00:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:17,138 INFO L93 Difference]: Finished difference Result 4179 states and 13864 transitions. [2022-03-01 18:00:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 18:00:17,138 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 [2022-03-01 18:00:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:17,146 INFO L225 Difference]: With dead ends: 4179 [2022-03-01 18:00:17,146 INFO L226 Difference]: Without dead ends: 4173 [2022-03-01 18:00:17,147 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 [2022-03-01 18:00:17,147 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 [2022-03-01 18:00:17,147 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] [2022-03-01 18:00:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2022-03-01 18:00:17,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 2710. [2022-03-01 18:00:17,189 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) [2022-03-01 18:00:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 9074 transitions. [2022-03-01 18:00:17,194 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 9074 transitions. Word has length 24 [2022-03-01 18:00:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:17,194 INFO L470 AbstractCegarLoop]: Abstraction has 2710 states and 9074 transitions. [2022-03-01 18:00:17,194 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) [2022-03-01 18:00:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 9074 transitions. [2022-03-01 18:00:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:17,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:17,198 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] [2022-03-01 18:00:17,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:17,398 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 [2022-03-01 18:00:17,398 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash -348066496, now seen corresponding path program 8 times [2022-03-01 18:00:17,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:17,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74591591] [2022-03-01 18:00:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:17,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:17,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74591591] [2022-03-01 18:00:17,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74591591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:17,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866998346] [2022-03-01 18:00:17,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:00:17,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:17,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:17,613 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:17,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-01 18:00:17,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:17,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:17,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:17,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:18,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:18,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:18,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:18,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:18,023 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 [2022-03-01 18:00:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:18,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:18,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:18,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:18,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:18,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:00:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:18,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866998346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:18,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:18,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 18:00:18,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753912909] [2022-03-01 18:00:18,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:18,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:00:18,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:18,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:00:18,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:00:18,746 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) [2022-03-01 18:00:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:20,799 INFO L93 Difference]: Finished difference Result 3515 states and 11562 transitions. [2022-03-01 18:00:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:00:20,799 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 [2022-03-01 18:00:20,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:20,807 INFO L225 Difference]: With dead ends: 3515 [2022-03-01 18:00:20,807 INFO L226 Difference]: Without dead ends: 3510 [2022-03-01 18:00:20,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=347, Invalid=3313, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:00:20,807 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 [2022-03-01 18:00:20,807 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] [2022-03-01 18:00:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2022-03-01 18:00:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 2686. [2022-03-01 18:00:20,858 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) [2022-03-01 18:00:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 9016 transitions. [2022-03-01 18:00:20,863 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 9016 transitions. Word has length 24 [2022-03-01 18:00:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:20,863 INFO L470 AbstractCegarLoop]: Abstraction has 2686 states and 9016 transitions. [2022-03-01 18:00:20,863 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) [2022-03-01 18:00:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 9016 transitions. [2022-03-01 18:00:20,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:20,866 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:20,866 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] [2022-03-01 18:00:20,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:21,067 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 [2022-03-01 18:00:21,067 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:21,067 INFO L85 PathProgramCache]: Analyzing trace with hash 704223460, now seen corresponding path program 9 times [2022-03-01 18:00:21,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:21,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113443401] [2022-03-01 18:00:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:21,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:21,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:21,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113443401] [2022-03-01 18:00:21,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113443401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:21,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140446470] [2022-03-01 18:00:21,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:00:21,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:21,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:21,285 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:21,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-01 18:00:21,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:00:21,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:21,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:21,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:21,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:21,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:21,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:21,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:21,648 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 37 treesize of output 39 [2022-03-01 18:00:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:21,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:22,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:22,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:22,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:22,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:00:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:22,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140446470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:22,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:22,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-01 18:00:22,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58412900] [2022-03-01 18:00:22,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:22,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:00:22,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:00:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:00:22,547 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) [2022-03-01 18:00:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:23,716 INFO L93 Difference]: Finished difference Result 3703 states and 12695 transitions. [2022-03-01 18:00:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:00:23,716 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 [2022-03-01 18:00:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:23,723 INFO L225 Difference]: With dead ends: 3703 [2022-03-01 18:00:23,723 INFO L226 Difference]: Without dead ends: 3701 [2022-03-01 18:00:23,724 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 [2022-03-01 18:00:23,724 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 [2022-03-01 18:00:23,724 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] [2022-03-01 18:00:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2022-03-01 18:00:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 2691. [2022-03-01 18:00:23,772 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) [2022-03-01 18:00:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 9027 transitions. [2022-03-01 18:00:23,777 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 9027 transitions. Word has length 24 [2022-03-01 18:00:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:23,777 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 9027 transitions. [2022-03-01 18:00:23,777 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) [2022-03-01 18:00:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 9027 transitions. [2022-03-01 18:00:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:23,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:23,781 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] [2022-03-01 18:00:23,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-03-01 18:00:23,982 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 [2022-03-01 18:00:23,982 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash -560222114, now seen corresponding path program 10 times [2022-03-01 18:00:23,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:23,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046903444] [2022-03-01 18:00:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:23,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:24,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:24,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046903444] [2022-03-01 18:00:24,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046903444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:24,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887975092] [2022-03-01 18:00:24,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:00:24,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:24,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:24,200 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:24,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-01 18:00:24,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:00:24,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:24,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:24,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:24,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:24,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:24,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:24,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:24,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:00:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:24,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:24,815 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:00:24,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:00:24,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:24,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:24,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:24,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:24,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:00:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:24,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887975092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:24,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:24,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:00:24,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869889991] [2022-03-01 18:00:24,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:24,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:00:24,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:24,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:00:24,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:00:24,887 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) [2022-03-01 18:00:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:26,308 INFO L93 Difference]: Finished difference Result 3064 states and 10166 transitions. [2022-03-01 18:00:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:00:26,309 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 [2022-03-01 18:00:26,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:26,315 INFO L225 Difference]: With dead ends: 3064 [2022-03-01 18:00:26,315 INFO L226 Difference]: Without dead ends: 3058 [2022-03-01 18:00:26,315 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 [2022-03-01 18:00:26,315 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 [2022-03-01 18:00:26,315 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] [2022-03-01 18:00:26,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-03-01 18:00:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2695. [2022-03-01 18:00:26,345 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) [2022-03-01 18:00:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9037 transitions. [2022-03-01 18:00:26,350 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9037 transitions. Word has length 24 [2022-03-01 18:00:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:26,350 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9037 transitions. [2022-03-01 18:00:26,350 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) [2022-03-01 18:00:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9037 transitions. [2022-03-01 18:00:26,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:26,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:26,354 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] [2022-03-01 18:00:26,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-03-01 18:00:26,555 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 [2022-03-01 18:00:26,555 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:26,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1092727899, now seen corresponding path program 1 times [2022-03-01 18:00:26,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:26,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969993113] [2022-03-01 18:00:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:26,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:26,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:26,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969993113] [2022-03-01 18:00:26,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969993113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:26,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765857619] [2022-03-01 18:00:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:26,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:26,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:26,794 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:26,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-01 18:00:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:26,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:26,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:27,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:27,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:27,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:27,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:27,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:00:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:27,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:27,424 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:00:27,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:00:27,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:27,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:27,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:27,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:27,479 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 20 treesize of output 3 [2022-03-01 18:00:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:27,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765857619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:27,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:27,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:00:27,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459920635] [2022-03-01 18:00:27,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:27,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:00:27,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:00:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:00:27,496 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) [2022-03-01 18:00:28,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:28,939 INFO L93 Difference]: Finished difference Result 3168 states and 10462 transitions. [2022-03-01 18:00:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:00:28,940 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 [2022-03-01 18:00:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:28,945 INFO L225 Difference]: With dead ends: 3168 [2022-03-01 18:00:28,945 INFO L226 Difference]: Without dead ends: 3162 [2022-03-01 18:00:28,945 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 [2022-03-01 18:00:28,946 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 [2022-03-01 18:00:28,946 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] [2022-03-01 18:00:28,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-03-01 18:00:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2692. [2022-03-01 18:00:28,974 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) [2022-03-01 18:00:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 9029 transitions. [2022-03-01 18:00:28,979 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 9029 transitions. Word has length 24 [2022-03-01 18:00:28,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:28,979 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 9029 transitions. [2022-03-01 18:00:28,979 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) [2022-03-01 18:00:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 9029 transitions. [2022-03-01 18:00:28,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:28,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:28,983 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] [2022-03-01 18:00:28,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-03-01 18:00:29,183 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 [2022-03-01 18:00:29,183 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash 161966204, now seen corresponding path program 11 times [2022-03-01 18:00:29,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:29,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729732635] [2022-03-01 18:00:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:29,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:29,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:29,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729732635] [2022-03-01 18:00:29,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729732635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:29,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162909446] [2022-03-01 18:00:29,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:00:29,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:29,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:29,418 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:29,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-01 18:00:29,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:00:29,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:29,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:29,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:29,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:29,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:29,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:29,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:29,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:00:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:29,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:30,003 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:00:30,003 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:00:30,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:30,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:30,057 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 20 treesize of output 3 [2022-03-01 18:00:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:30,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162909446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:30,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:30,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:00:30,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17528688] [2022-03-01 18:00:30,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:30,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:00:30,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:30,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:00:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:00:30,075 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) [2022-03-01 18:00:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:30,987 INFO L93 Difference]: Finished difference Result 3042 states and 10151 transitions. [2022-03-01 18:00:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:00:30,987 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 [2022-03-01 18:00:30,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:30,993 INFO L225 Difference]: With dead ends: 3042 [2022-03-01 18:00:30,993 INFO L226 Difference]: Without dead ends: 3036 [2022-03-01 18:00:30,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:00:30,993 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:30,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 159 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1320 Invalid, 0 Unknown, 513 Unchecked, 0.5s Time] [2022-03-01 18:00:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2022-03-01 18:00:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2695. [2022-03-01 18:00:31,023 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) [2022-03-01 18:00:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 9035 transitions. [2022-03-01 18:00:31,048 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 9035 transitions. Word has length 24 [2022-03-01 18:00:31,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:31,048 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 9035 transitions. [2022-03-01 18:00:31,048 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) [2022-03-01 18:00:31,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 9035 transitions. [2022-03-01 18:00:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:31,052 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:31,052 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] [2022-03-01 18:00:31,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:31,252 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 [2022-03-01 18:00:31,252 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:31,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1493345026, now seen corresponding path program 12 times [2022-03-01 18:00:31,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:31,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266687118] [2022-03-01 18:00:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:31,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:31,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:31,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266687118] [2022-03-01 18:00:31,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266687118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:31,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850265655] [2022-03-01 18:00:31,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:00:31,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:31,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:31,490 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:31,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-01 18:00:31,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:00:31,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:31,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:31,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:31,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:31,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:31,863 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 [2022-03-01 18:00:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:32,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:32,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:32,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:32,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:32,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:32,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:00:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:32,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850265655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:32,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:32,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 18:00:32,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033339558] [2022-03-01 18:00:32,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:32,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:00:32,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:32,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:00:32,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:00:32,538 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) [2022-03-01 18:00:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:34,052 INFO L93 Difference]: Finished difference Result 3280 states and 10877 transitions. [2022-03-01 18:00:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:00:34,052 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 [2022-03-01 18:00:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:34,059 INFO L225 Difference]: With dead ends: 3280 [2022-03-01 18:00:34,059 INFO L226 Difference]: Without dead ends: 3272 [2022-03-01 18:00:34,059 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 [2022-03-01 18:00:34,059 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 [2022-03-01 18:00:34,059 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] [2022-03-01 18:00:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-03-01 18:00:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2700. [2022-03-01 18:00:34,101 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) [2022-03-01 18:00:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 9047 transitions. [2022-03-01 18:00:34,106 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 9047 transitions. Word has length 24 [2022-03-01 18:00:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:34,106 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 9047 transitions. [2022-03-01 18:00:34,106 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) [2022-03-01 18:00:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 9047 transitions. [2022-03-01 18:00:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:34,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:34,111 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] [2022-03-01 18:00:34,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:34,332 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 [2022-03-01 18:00:34,333 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:34,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2106276388, now seen corresponding path program 13 times [2022-03-01 18:00:34,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:34,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857092053] [2022-03-01 18:00:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:34,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:34,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:34,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857092053] [2022-03-01 18:00:34,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857092053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:34,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941742533] [2022-03-01 18:00:34,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:34,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:34,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:34,571 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:34,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-01 18:00:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:34,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:34,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:34,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:34,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:34,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 18:00:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:34,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:35,139 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:00:35,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:00:35,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:35,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:35,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:35,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:35,184 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 20 treesize of output 3 [2022-03-01 18:00:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:35,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941742533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:35,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:35,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:00:35,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189958701] [2022-03-01 18:00:35,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:35,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:00:35,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:35,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:00:35,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:00:35,201 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) [2022-03-01 18:00:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:35,957 INFO L93 Difference]: Finished difference Result 3046 states and 10128 transitions. [2022-03-01 18:00:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:00:35,958 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 [2022-03-01 18:00:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:35,963 INFO L225 Difference]: With dead ends: 3046 [2022-03-01 18:00:35,963 INFO L226 Difference]: Without dead ends: 3040 [2022-03-01 18:00:35,963 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 [2022-03-01 18:00:35,963 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 [2022-03-01 18:00:35,963 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] [2022-03-01 18:00:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2022-03-01 18:00:35,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 2711. [2022-03-01 18:00:35,991 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) [2022-03-01 18:00:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 9073 transitions. [2022-03-01 18:00:35,996 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 9073 transitions. Word has length 24 [2022-03-01 18:00:35,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:35,996 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 9073 transitions. [2022-03-01 18:00:35,996 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) [2022-03-01 18:00:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 9073 transitions. [2022-03-01 18:00:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:35,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:35,999 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] [2022-03-01 18:00:36,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-03-01 18:00:36,200 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 [2022-03-01 18:00:36,200 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:36,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:36,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1245023274, now seen corresponding path program 14 times [2022-03-01 18:00:36,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:36,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503221020] [2022-03-01 18:00:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:36,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:36,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:36,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503221020] [2022-03-01 18:00:36,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503221020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:36,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209781236] [2022-03-01 18:00:36,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:00:36,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:36,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:36,435 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:36,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-01 18:00:36,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:36,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:36,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:36,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:36,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:36,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:36,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:36,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:36,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:00:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:36,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:37,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:37,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:37,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:37,452 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 [2022-03-01 18:00:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:37,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209781236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:37,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:37,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:00:37,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955288105] [2022-03-01 18:00:37,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:37,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:00:37,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:37,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:00:37,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:00:37,532 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) [2022-03-01 18:00:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:38,962 INFO L93 Difference]: Finished difference Result 3799 states and 13030 transitions. [2022-03-01 18:00:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:00:38,963 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 [2022-03-01 18:00:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:38,969 INFO L225 Difference]: With dead ends: 3799 [2022-03-01 18:00:38,969 INFO L226 Difference]: Without dead ends: 3794 [2022-03-01 18:00:38,970 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 [2022-03-01 18:00:38,970 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 [2022-03-01 18:00:38,970 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] [2022-03-01 18:00:38,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2022-03-01 18:00:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 2716. [2022-03-01 18:00:39,011 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) [2022-03-01 18:00:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 9088 transitions. [2022-03-01 18:00:39,016 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 9088 transitions. Word has length 24 [2022-03-01 18:00:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:39,016 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 9088 transitions. [2022-03-01 18:00:39,016 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) [2022-03-01 18:00:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 9088 transitions. [2022-03-01 18:00:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:39,020 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:39,020 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] [2022-03-01 18:00:39,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:39,220 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 [2022-03-01 18:00:39,221 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:39,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1242489559, now seen corresponding path program 2 times [2022-03-01 18:00:39,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:39,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236567068] [2022-03-01 18:00:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:39,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:39,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:39,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236567068] [2022-03-01 18:00:39,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236567068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:39,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466501626] [2022-03-01 18:00:39,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:00:39,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:39,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:39,486 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:39,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-01 18:00:39,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:39,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:39,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:39,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:39,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:39,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:39,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:39,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:39,829 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 37 treesize of output 39 [2022-03-01 18:00:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:40,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:40,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:40,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:40,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:40,519 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 [2022-03-01 18:00:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:40,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466501626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:40,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:40,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:00:40,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561294086] [2022-03-01 18:00:40,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:40,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:00:40,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:40,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:00:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:00:40,604 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) [2022-03-01 18:00:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:41,622 INFO L93 Difference]: Finished difference Result 3740 states and 12792 transitions. [2022-03-01 18:00:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:00:41,623 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 [2022-03-01 18:00:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:41,631 INFO L225 Difference]: With dead ends: 3740 [2022-03-01 18:00:41,631 INFO L226 Difference]: Without dead ends: 3735 [2022-03-01 18:00:41,631 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 [2022-03-01 18:00:41,631 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 [2022-03-01 18:00:41,631 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] [2022-03-01 18:00:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2022-03-01 18:00:41,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 2724. [2022-03-01 18:00:41,669 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) [2022-03-01 18:00:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9109 transitions. [2022-03-01 18:00:41,674 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9109 transitions. Word has length 24 [2022-03-01 18:00:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:41,674 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9109 transitions. [2022-03-01 18:00:41,674 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) [2022-03-01 18:00:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9109 transitions. [2022-03-01 18:00:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:41,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:41,678 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] [2022-03-01 18:00:41,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-03-01 18:00:41,879 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 [2022-03-01 18:00:41,879 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2037251490, now seen corresponding path program 15 times [2022-03-01 18:00:41,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:41,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010148887] [2022-03-01 18:00:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:41,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:42,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:42,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010148887] [2022-03-01 18:00:42,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010148887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:42,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92477929] [2022-03-01 18:00:42,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:00:42,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:42,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:42,200 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:42,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-01 18:00:42,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:00:42,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:42,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:42,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:42,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:42,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:42,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:42,697 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 21 [2022-03-01 18:00:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:42,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:43,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:43,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:43,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:00:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:43,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92477929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:43,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:43,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:00:43,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098883718] [2022-03-01 18:00:43,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:43,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:00:43,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:43,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:00:43,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:00:43,183 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) [2022-03-01 18:00:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:44,199 INFO L93 Difference]: Finished difference Result 3059 states and 10170 transitions. [2022-03-01 18:00:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:00:44,199 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 [2022-03-01 18:00:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:44,205 INFO L225 Difference]: With dead ends: 3059 [2022-03-01 18:00:44,205 INFO L226 Difference]: Without dead ends: 3057 [2022-03-01 18:00:44,205 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 [2022-03-01 18:00:44,205 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 [2022-03-01 18:00:44,205 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] [2022-03-01 18:00:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2022-03-01 18:00:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 2724. [2022-03-01 18:00:44,235 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) [2022-03-01 18:00:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9109 transitions. [2022-03-01 18:00:44,241 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9109 transitions. Word has length 24 [2022-03-01 18:00:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:44,241 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9109 transitions. [2022-03-01 18:00:44,241 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) [2022-03-01 18:00:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9109 transitions. [2022-03-01 18:00:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:44,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:44,245 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] [2022-03-01 18:00:44,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-03-01 18:00:44,445 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 [2022-03-01 18:00:44,446 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:44,446 INFO L85 PathProgramCache]: Analyzing trace with hash 229797027, now seen corresponding path program 3 times [2022-03-01 18:00:44,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:44,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950077715] [2022-03-01 18:00:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:44,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:44,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:44,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950077715] [2022-03-01 18:00:44,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950077715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:44,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533708913] [2022-03-01 18:00:44,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:00:44,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:44,703 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:44,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-01 18:00:44,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:00:44,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:44,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:45,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:45,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:45,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:45,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-01 18:00:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:45,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:45,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:45,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:45,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:00:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:45,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533708913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:45,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:45,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:00:45,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121709951] [2022-03-01 18:00:45,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:45,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:00:45,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:00:45,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:00:45,743 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) [2022-03-01 18:00:47,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:47,087 INFO L93 Difference]: Finished difference Result 3203 states and 10673 transitions. [2022-03-01 18:00:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:00:47,088 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 [2022-03-01 18:00:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:47,094 INFO L225 Difference]: With dead ends: 3203 [2022-03-01 18:00:47,094 INFO L226 Difference]: Without dead ends: 3198 [2022-03-01 18:00:47,094 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 [2022-03-01 18:00:47,094 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 [2022-03-01 18:00:47,094 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] [2022-03-01 18:00:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2022-03-01 18:00:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2721. [2022-03-01 18:00:47,125 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) [2022-03-01 18:00:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 9101 transitions. [2022-03-01 18:00:47,130 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 9101 transitions. Word has length 24 [2022-03-01 18:00:47,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:47,130 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 9101 transitions. [2022-03-01 18:00:47,131 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) [2022-03-01 18:00:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 9101 transitions. [2022-03-01 18:00:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:47,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:47,136 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] [2022-03-01 18:00:47,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-03-01 18:00:47,337 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 [2022-03-01 18:00:47,338 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:47,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:47,338 INFO L85 PathProgramCache]: Analyzing trace with hash 290200096, now seen corresponding path program 16 times [2022-03-01 18:00:47,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:47,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096922123] [2022-03-01 18:00:47,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:47,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:47,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:47,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096922123] [2022-03-01 18:00:47,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096922123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:47,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310919137] [2022-03-01 18:00:47,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:00:47,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:47,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:47,622 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:47,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-01 18:00:47,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:00:47,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:47,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:47,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:47,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:47,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:47,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:47,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:47,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:00:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:47,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:48,203 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:00:48,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:00:48,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:48,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:48,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:48,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:48,253 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 20 treesize of output 3 [2022-03-01 18:00:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:48,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310919137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:48,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:48,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:00:48,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68606] [2022-03-01 18:00:48,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:48,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:00:48,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:48,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:00:48,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:00:48,271 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) [2022-03-01 18:00:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:49,385 INFO L93 Difference]: Finished difference Result 3085 states and 10266 transitions. [2022-03-01 18:00:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:00:49,386 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 [2022-03-01 18:00:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:49,394 INFO L225 Difference]: With dead ends: 3085 [2022-03-01 18:00:49,394 INFO L226 Difference]: Without dead ends: 3079 [2022-03-01 18:00:49,394 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 [2022-03-01 18:00:49,394 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:49,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 151 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1267 Invalid, 0 Unknown, 233 Unchecked, 0.6s Time] [2022-03-01 18:00:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2022-03-01 18:00:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 2722. [2022-03-01 18:00:49,430 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) [2022-03-01 18:00:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 9103 transitions. [2022-03-01 18:00:49,436 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 9103 transitions. Word has length 24 [2022-03-01 18:00:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:49,436 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 9103 transitions. [2022-03-01 18:00:49,436 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) [2022-03-01 18:00:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 9103 transitions. [2022-03-01 18:00:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:49,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:49,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:49,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-03-01 18:00:49,643 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 [2022-03-01 18:00:49,644 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1596395592, now seen corresponding path program 17 times [2022-03-01 18:00:49,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:49,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298078496] [2022-03-01 18:00:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:49,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:49,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:49,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298078496] [2022-03-01 18:00:49,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298078496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:49,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311633170] [2022-03-01 18:00:49,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:00:49,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:49,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:49,903 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:49,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-01 18:00:49,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:00:49,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:00:49,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:50,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:50,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:50,200 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2022-03-01 18:00:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:50,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:50,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:50,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:50,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:00:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:50,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311633170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:50,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:50,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:00:50,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050876309] [2022-03-01 18:00:50,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:50,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:00:50,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:50,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:00:50,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:00:50,929 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) [2022-03-01 18:00:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:51,857 INFO L93 Difference]: Finished difference Result 2948 states and 9837 transitions. [2022-03-01 18:00:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:00:51,858 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 [2022-03-01 18:00:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:51,863 INFO L225 Difference]: With dead ends: 2948 [2022-03-01 18:00:51,863 INFO L226 Difference]: Without dead ends: 2942 [2022-03-01 18:00:51,864 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 [2022-03-01 18:00:51,864 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 [2022-03-01 18:00:51,864 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] [2022-03-01 18:00:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2022-03-01 18:00:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2724. [2022-03-01 18:00:51,894 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) [2022-03-01 18:00:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 9107 transitions. [2022-03-01 18:00:51,900 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 9107 transitions. Word has length 24 [2022-03-01 18:00:51,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:51,900 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 9107 transitions. [2022-03-01 18:00:51,900 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) [2022-03-01 18:00:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 9107 transitions. [2022-03-01 18:00:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:51,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:51,904 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] [2022-03-01 18:00:51,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-03-01 18:00:52,104 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 [2022-03-01 18:00:52,104 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:52,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:52,105 INFO L85 PathProgramCache]: Analyzing trace with hash -528106916, now seen corresponding path program 18 times [2022-03-01 18:00:52,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:52,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075426779] [2022-03-01 18:00:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:52,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:52,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075426779] [2022-03-01 18:00:52,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075426779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:52,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532052671] [2022-03-01 18:00:52,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:00:52,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:52,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:52,359 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:52,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-01 18:00:52,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:00:52,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:52,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-01 18:00:52,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:52,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:52,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:52,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:00:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:53,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:53,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:53,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:53,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:53,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:53,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 7 [2022-03-01 18:00:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:53,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532052671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:53,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:53,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 18:00:53,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428224096] [2022-03-01 18:00:53,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:53,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:00:53,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:53,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:00:53,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:00:53,828 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) [2022-03-01 18:00:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:54,827 INFO L93 Difference]: Finished difference Result 2971 states and 9838 transitions. [2022-03-01 18:00:54,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 18:00:54,827 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 [2022-03-01 18:00:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:54,833 INFO L225 Difference]: With dead ends: 2971 [2022-03-01 18:00:54,833 INFO L226 Difference]: Without dead ends: 2965 [2022-03-01 18:00:54,833 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 [2022-03-01 18:00:54,833 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 [2022-03-01 18:00:54,833 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] [2022-03-01 18:00:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2022-03-01 18:00:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2725. [2022-03-01 18:00:54,863 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) [2022-03-01 18:00:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 9110 transitions. [2022-03-01 18:00:54,869 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 9110 transitions. Word has length 24 [2022-03-01 18:00:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:54,869 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 9110 transitions. [2022-03-01 18:00:54,869 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) [2022-03-01 18:00:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 9110 transitions. [2022-03-01 18:00:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:54,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:54,872 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] [2022-03-01 18:00:54,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-03-01 18:00:55,073 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 [2022-03-01 18:00:55,073 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash 205459606, now seen corresponding path program 19 times [2022-03-01 18:00:55,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:55,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578443832] [2022-03-01 18:00:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:55,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:55,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:55,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578443832] [2022-03-01 18:00:55,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578443832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:55,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94322402] [2022-03-01 18:00:55,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:55,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:55,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:55,323 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:55,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-01 18:00:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:55,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:55,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:55,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:55,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:55,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:00:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:55,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:55,883 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:00:55,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:00:55,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:55,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:55,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:55,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:55,925 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 20 treesize of output 3 [2022-03-01 18:00:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:55,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94322402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:55,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:55,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-03-01 18:00:55,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43885004] [2022-03-01 18:00:55,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:55,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:00:55,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:55,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:00:55,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:00:55,943 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) [2022-03-01 18:00:56,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:56,709 INFO L93 Difference]: Finished difference Result 3010 states and 10068 transitions. [2022-03-01 18:00:56,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:00:56,709 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 [2022-03-01 18:00:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:56,714 INFO L225 Difference]: With dead ends: 3010 [2022-03-01 18:00:56,714 INFO L226 Difference]: Without dead ends: 3003 [2022-03-01 18:00:56,714 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 [2022-03-01 18:00:56,715 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 [2022-03-01 18:00:56,715 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] [2022-03-01 18:00:56,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2022-03-01 18:00:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2722. [2022-03-01 18:00:56,744 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) [2022-03-01 18:00:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 9103 transitions. [2022-03-01 18:00:56,749 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 9103 transitions. Word has length 24 [2022-03-01 18:00:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:56,749 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 9103 transitions. [2022-03-01 18:00:56,749 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) [2022-03-01 18:00:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 9103 transitions. [2022-03-01 18:00:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:56,765 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:56,765 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] [2022-03-01 18:00:56,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-03-01 18:00:56,967 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 [2022-03-01 18:00:56,967 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:56,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1151190437, now seen corresponding path program 1 times [2022-03-01 18:00:56,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:56,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765024569] [2022-03-01 18:00:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:56,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:57,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:57,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765024569] [2022-03-01 18:00:57,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765024569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:57,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528638452] [2022-03-01 18:00:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:57,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:57,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:57,174 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:57,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-01 18:00:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:57,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:57,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:57,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:57,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:57,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:57,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:00:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:57,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:57,776 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:00:57,776 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:00:57,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:57,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:57,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:57,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:57,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:00:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:57,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528638452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:57,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:57,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:00:57,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155569082] [2022-03-01 18:00:57,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:57,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:00:57,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:57,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:00:57,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:00:57,842 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) [2022-03-01 18:00:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:59,511 INFO L93 Difference]: Finished difference Result 3685 states and 12161 transitions. [2022-03-01 18:00:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:00:59,511 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 [2022-03-01 18:00:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:59,518 INFO L225 Difference]: With dead ends: 3685 [2022-03-01 18:00:59,518 INFO L226 Difference]: Without dead ends: 3677 [2022-03-01 18:00:59,518 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 [2022-03-01 18:00:59,518 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 [2022-03-01 18:00:59,518 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] [2022-03-01 18:00:59,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2022-03-01 18:00:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 2742. [2022-03-01 18:00:59,558 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) [2022-03-01 18:00:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 9145 transitions. [2022-03-01 18:00:59,563 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 9145 transitions. Word has length 24 [2022-03-01 18:00:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:59,563 INFO L470 AbstractCegarLoop]: Abstraction has 2742 states and 9145 transitions. [2022-03-01 18:00:59,563 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) [2022-03-01 18:00:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 9145 transitions. [2022-03-01 18:00:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:00:59,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:59,567 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] [2022-03-01 18:00:59,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:59,767 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 [2022-03-01 18:00:59,767 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:00:59,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:59,767 INFO L85 PathProgramCache]: Analyzing trace with hash -274716803, now seen corresponding path program 2 times [2022-03-01 18:00:59,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:59,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718938700] [2022-03-01 18:00:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:59,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:59,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:59,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718938700] [2022-03-01 18:00:59,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718938700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:59,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443620975] [2022-03-01 18:00:59,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:00:59,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:59,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:59,974 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:59,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-01 18:00:59,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:59,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:59,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:00:59,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:00,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:00,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:00,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:00,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:00,366 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 [2022-03-01 18:01:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:00,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:01,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:01,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:01,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:01,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:01,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443620975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:01,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:01,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 18:01:01,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585091197] [2022-03-01 18:01:01,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:01,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:01:01,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:01:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:01:01,077 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) [2022-03-01 18:01:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:03,310 INFO L93 Difference]: Finished difference Result 3536 states and 11657 transitions. [2022-03-01 18:01:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 18:01:03,310 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 [2022-03-01 18:01:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:03,329 INFO L225 Difference]: With dead ends: 3536 [2022-03-01 18:01:03,329 INFO L226 Difference]: Without dead ends: 3530 [2022-03-01 18:01:03,330 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 [2022-03-01 18:01:03,330 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 [2022-03-01 18:01:03,330 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] [2022-03-01 18:01:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2022-03-01 18:01:03,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 2744. [2022-03-01 18:01:03,361 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) [2022-03-01 18:01:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 9150 transitions. [2022-03-01 18:01:03,365 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 9150 transitions. Word has length 24 [2022-03-01 18:01:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:03,366 INFO L470 AbstractCegarLoop]: Abstraction has 2744 states and 9150 transitions. [2022-03-01 18:01:03,366 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) [2022-03-01 18:01:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 9150 transitions. [2022-03-01 18:01:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:03,369 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:03,369 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] [2022-03-01 18:01:03,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-03-01 18:01:03,569 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 [2022-03-01 18:01:03,570 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash -145634084, now seen corresponding path program 1 times [2022-03-01 18:01:03,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:03,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819172036] [2022-03-01 18:01:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:03,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:03,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:03,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819172036] [2022-03-01 18:01:03,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819172036] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:03,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818505858] [2022-03-01 18:01:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:03,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:03,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:03,781 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:03,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-01 18:01:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:03,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:03,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:04,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:04,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:04,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:04,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:04,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:04,380 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:01:04,380 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:01:04,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:04,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:04,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:04,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:04,436 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:01:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:04,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818505858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:04,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:04,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:01:04,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599937189] [2022-03-01 18:01:04,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:04,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:01:04,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:04,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:01:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:01:04,453 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) [2022-03-01 18:01:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:05,958 INFO L93 Difference]: Finished difference Result 3704 states and 12061 transitions. [2022-03-01 18:01:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:01:05,958 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 [2022-03-01 18:01:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:05,965 INFO L225 Difference]: With dead ends: 3704 [2022-03-01 18:01:05,965 INFO L226 Difference]: Without dead ends: 3702 [2022-03-01 18:01:05,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=2514, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:01:05,966 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 [2022-03-01 18:01:05,966 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] [2022-03-01 18:01:05,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-01 18:01:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 2746. [2022-03-01 18:01:06,003 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) [2022-03-01 18:01:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 9160 transitions. [2022-03-01 18:01:06,029 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 9160 transitions. Word has length 24 [2022-03-01 18:01:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:06,029 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 9160 transitions. [2022-03-01 18:01:06,029 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) [2022-03-01 18:01:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 9160 transitions. [2022-03-01 18:01:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:06,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:06,033 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] [2022-03-01 18:01:06,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-03-01 18:01:06,233 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 [2022-03-01 18:01:06,234 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:06,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:06,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2083192027, now seen corresponding path program 3 times [2022-03-01 18:01:06,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:06,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65628592] [2022-03-01 18:01:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:06,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:06,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:06,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65628592] [2022-03-01 18:01:06,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65628592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:06,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069496887] [2022-03-01 18:01:06,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:01:06,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:06,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:06,448 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:06,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-01 18:01:06,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:01:06,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:06,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:01:06,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:06,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:06,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:06,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:06,802 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-03-01 18:01:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:06,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:07,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:07,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:07,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:07,517 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 [2022-03-01 18:01:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:07,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069496887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:07,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:07,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-01 18:01:07,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944669476] [2022-03-01 18:01:07,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:07,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:01:07,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:07,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:01:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:01:07,608 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) [2022-03-01 18:01:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:10,456 INFO L93 Difference]: Finished difference Result 3932 states and 13282 transitions. [2022-03-01 18:01:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 18:01:10,456 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 [2022-03-01 18:01:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:10,464 INFO L225 Difference]: With dead ends: 3932 [2022-03-01 18:01:10,464 INFO L226 Difference]: Without dead ends: 3928 [2022-03-01 18:01:10,464 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 [2022-03-01 18:01:10,464 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 [2022-03-01 18:01:10,464 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] [2022-03-01 18:01:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2022-03-01 18:01:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 2769. [2022-03-01 18:01:10,502 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) [2022-03-01 18:01:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 9214 transitions. [2022-03-01 18:01:10,508 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 9214 transitions. Word has length 24 [2022-03-01 18:01:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:10,508 INFO L470 AbstractCegarLoop]: Abstraction has 2769 states and 9214 transitions. [2022-03-01 18:01:10,509 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) [2022-03-01 18:01:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 9214 transitions. [2022-03-01 18:01:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:10,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:10,512 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] [2022-03-01 18:01:10,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-03-01 18:01:10,713 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 [2022-03-01 18:01:10,713 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:10,713 INFO L85 PathProgramCache]: Analyzing trace with hash -707981535, now seen corresponding path program 4 times [2022-03-01 18:01:10,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:10,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669440559] [2022-03-01 18:01:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:10,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:10,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:10,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669440559] [2022-03-01 18:01:10,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669440559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:10,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638187656] [2022-03-01 18:01:10,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:01:10,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:10,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:10,931 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:10,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-01 18:01:10,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:01:10,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:10,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:10,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:11,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:11,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:11,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:11,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:11,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:11,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:11,573 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:01:11,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:01:11,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:11,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:11,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:11,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:11,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:01:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:11,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638187656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:11,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:11,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:01:11,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039952724] [2022-03-01 18:01:11,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:11,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:01:11,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:11,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:01:11,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:01:11,636 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) [2022-03-01 18:01:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:12,529 INFO L93 Difference]: Finished difference Result 3161 states and 10431 transitions. [2022-03-01 18:01:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:01:12,529 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 [2022-03-01 18:01:12,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:12,536 INFO L225 Difference]: With dead ends: 3161 [2022-03-01 18:01:12,536 INFO L226 Difference]: Without dead ends: 3155 [2022-03-01 18:01:12,536 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 [2022-03-01 18:01:12,536 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 [2022-03-01 18:01:12,536 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] [2022-03-01 18:01:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2022-03-01 18:01:12,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 2773. [2022-03-01 18:01:12,584 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) [2022-03-01 18:01:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 9223 transitions. [2022-03-01 18:01:12,590 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 9223 transitions. Word has length 24 [2022-03-01 18:01:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:12,590 INFO L470 AbstractCegarLoop]: Abstraction has 2773 states and 9223 transitions. [2022-03-01 18:01:12,590 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) [2022-03-01 18:01:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 9223 transitions. [2022-03-01 18:01:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:12,594 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:12,594 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] [2022-03-01 18:01:12,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:12,794 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 [2022-03-01 18:01:12,794 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1132045153, now seen corresponding path program 5 times [2022-03-01 18:01:12,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:12,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914557611] [2022-03-01 18:01:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:12,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:13,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:13,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914557611] [2022-03-01 18:01:13,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914557611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:13,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253553403] [2022-03-01 18:01:13,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:01:13,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:13,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:13,015 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:13,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-01 18:01:13,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:01:13,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:13,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:13,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:13,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:13,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:13,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:13,320 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 18:01:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:13,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:13,609 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:01:13,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:01:13,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:13,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:13,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:13,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:13,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:01:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:13,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253553403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:13,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:13,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:01:13,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473621551] [2022-03-01 18:01:13,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:13,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:01:13,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:13,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:01:13,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:01:13,680 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) [2022-03-01 18:01:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:14,864 INFO L93 Difference]: Finished difference Result 3090 states and 10233 transitions. [2022-03-01 18:01:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:01:14,864 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 [2022-03-01 18:01:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:14,870 INFO L225 Difference]: With dead ends: 3090 [2022-03-01 18:01:14,870 INFO L226 Difference]: Without dead ends: 3085 [2022-03-01 18:01:14,870 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 [2022-03-01 18:01:14,870 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 [2022-03-01 18:01:14,871 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] [2022-03-01 18:01:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2022-03-01 18:01:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2774. [2022-03-01 18:01:14,901 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) [2022-03-01 18:01:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 9225 transitions. [2022-03-01 18:01:14,906 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 9225 transitions. Word has length 24 [2022-03-01 18:01:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:14,907 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 9225 transitions. [2022-03-01 18:01:14,907 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) [2022-03-01 18:01:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 9225 transitions. [2022-03-01 18:01:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:14,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:14,910 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] [2022-03-01 18:01:14,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:15,111 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 [2022-03-01 18:01:15,111 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:15,111 INFO L85 PathProgramCache]: Analyzing trace with hash -675409310, now seen corresponding path program 2 times [2022-03-01 18:01:15,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:15,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420481003] [2022-03-01 18:01:15,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:15,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:15,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:15,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420481003] [2022-03-01 18:01:15,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420481003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:15,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058283358] [2022-03-01 18:01:15,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:01:15,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:15,331 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:15,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-01 18:01:15,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:01:15,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:15,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:15,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:15,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:15,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:15,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:15,946 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 [2022-03-01 18:01:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:16,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:16,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:16,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:16,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:16,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:16,780 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 [2022-03-01 18:01:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:16,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058283358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:16,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:16,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 18:01:16,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050207002] [2022-03-01 18:01:16,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:16,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:01:16,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:01:16,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:01:16,905 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) [2022-03-01 18:01:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:17,676 INFO L93 Difference]: Finished difference Result 3203 states and 10594 transitions. [2022-03-01 18:01:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:01:17,677 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 [2022-03-01 18:01:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:17,683 INFO L225 Difference]: With dead ends: 3203 [2022-03-01 18:01:17,683 INFO L226 Difference]: Without dead ends: 3193 [2022-03-01 18:01:17,684 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 [2022-03-01 18:01:17,684 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 [2022-03-01 18:01:17,684 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] [2022-03-01 18:01:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2022-03-01 18:01:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 2816. [2022-03-01 18:01:17,718 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) [2022-03-01 18:01:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 9355 transitions. [2022-03-01 18:01:17,723 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 9355 transitions. Word has length 24 [2022-03-01 18:01:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:17,723 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 9355 transitions. [2022-03-01 18:01:17,723 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) [2022-03-01 18:01:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 9355 transitions. [2022-03-01 18:01:17,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:17,727 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:17,727 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] [2022-03-01 18:01:17,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-03-01 18:01:17,927 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 [2022-03-01 18:01:17,928 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:17,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1669518013, now seen corresponding path program 6 times [2022-03-01 18:01:17,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:17,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184272534] [2022-03-01 18:01:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:17,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:18,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:18,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184272534] [2022-03-01 18:01:18,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184272534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:18,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818314962] [2022-03-01 18:01:18,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:01:18,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:18,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:18,166 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:18,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-01 18:01:18,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:01:18,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:18,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:18,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:18,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:18,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:18,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:18,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:18,570 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 [2022-03-01 18:01:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:18,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:19,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:19,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:19,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:19,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:19,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:19,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818314962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:19,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:19,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 18:01:19,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942507717] [2022-03-01 18:01:19,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:19,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:01:19,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:19,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:01:19,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:01:19,276 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) [2022-03-01 18:01:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:21,142 INFO L93 Difference]: Finished difference Result 3691 states and 12172 transitions. [2022-03-01 18:01:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:01:21,142 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 [2022-03-01 18:01:21,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:21,150 INFO L225 Difference]: With dead ends: 3691 [2022-03-01 18:01:21,150 INFO L226 Difference]: Without dead ends: 3679 [2022-03-01 18:01:21,150 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 [2022-03-01 18:01:21,151 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 [2022-03-01 18:01:21,151 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] [2022-03-01 18:01:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2022-03-01 18:01:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 2821. [2022-03-01 18:01:21,205 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) [2022-03-01 18:01:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 9369 transitions. [2022-03-01 18:01:21,210 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 9369 transitions. Word has length 24 [2022-03-01 18:01:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:21,210 INFO L470 AbstractCegarLoop]: Abstraction has 2821 states and 9369 transitions. [2022-03-01 18:01:21,210 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) [2022-03-01 18:01:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 9369 transitions. [2022-03-01 18:01:21,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:21,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:21,214 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] [2022-03-01 18:01:21,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:21,414 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 [2022-03-01 18:01:21,414 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:21,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1797751905, now seen corresponding path program 7 times [2022-03-01 18:01:21,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:21,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263977601] [2022-03-01 18:01:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:21,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:21,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:21,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263977601] [2022-03-01 18:01:21,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263977601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:21,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065419762] [2022-03-01 18:01:21,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:01:21,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:21,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:21,674 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:21,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-01 18:01:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:21,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:21,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:21,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:21,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:21,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:21,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:22,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:22,254 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:01:22,254 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:01:22,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:22,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:22,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:22,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065419762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:22,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:22,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:01:22,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687137947] [2022-03-01 18:01:22,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:22,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:01:22,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:22,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:01:22,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:01:22,328 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) [2022-03-01 18:01:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:23,811 INFO L93 Difference]: Finished difference Result 3239 states and 10730 transitions. [2022-03-01 18:01:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:01:23,812 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 [2022-03-01 18:01:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:23,818 INFO L225 Difference]: With dead ends: 3239 [2022-03-01 18:01:23,818 INFO L226 Difference]: Without dead ends: 3233 [2022-03-01 18:01:23,818 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 [2022-03-01 18:01:23,818 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 [2022-03-01 18:01:23,818 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] [2022-03-01 18:01:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2022-03-01 18:01:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2824. [2022-03-01 18:01:23,848 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) [2022-03-01 18:01:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 9375 transitions. [2022-03-01 18:01:23,854 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 9375 transitions. Word has length 24 [2022-03-01 18:01:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:23,854 INFO L470 AbstractCegarLoop]: Abstraction has 2824 states and 9375 transitions. [2022-03-01 18:01:23,854 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) [2022-03-01 18:01:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 9375 transitions. [2022-03-01 18:01:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:23,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:23,858 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] [2022-03-01 18:01:23,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:24,059 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 [2022-03-01 18:01:24,060 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:24,060 INFO L85 PathProgramCache]: Analyzing trace with hash -88843783, now seen corresponding path program 8 times [2022-03-01 18:01:24,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:24,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556824085] [2022-03-01 18:01:24,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:24,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:24,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:24,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556824085] [2022-03-01 18:01:24,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556824085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:24,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674850152] [2022-03-01 18:01:24,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:01:24,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:24,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:24,323 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:24,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-01 18:01:24,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:01:24,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:24,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:01:24,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:24,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:24,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:24,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:24,581 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 30 treesize of output 34 [2022-03-01 18:01:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:24,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:25,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:25,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:25,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:25,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:01:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:25,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674850152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:25,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:25,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:01:25,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232460570] [2022-03-01 18:01:25,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:25,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:01:25,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:25,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:01:25,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:01:25,524 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) [2022-03-01 18:01:27,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:27,159 INFO L93 Difference]: Finished difference Result 3894 states and 13205 transitions. [2022-03-01 18:01:27,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:01:27,159 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 [2022-03-01 18:01:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:27,167 INFO L225 Difference]: With dead ends: 3894 [2022-03-01 18:01:27,167 INFO L226 Difference]: Without dead ends: 3884 [2022-03-01 18:01:27,168 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 [2022-03-01 18:01:27,168 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 [2022-03-01 18:01:27,168 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] [2022-03-01 18:01:27,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3884 states. [2022-03-01 18:01:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3884 to 2829. [2022-03-01 18:01:27,218 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) [2022-03-01 18:01:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 9385 transitions. [2022-03-01 18:01:27,223 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 9385 transitions. Word has length 24 [2022-03-01 18:01:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:27,223 INFO L470 AbstractCegarLoop]: Abstraction has 2829 states and 9385 transitions. [2022-03-01 18:01:27,223 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) [2022-03-01 18:01:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 9385 transitions. [2022-03-01 18:01:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:27,227 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:27,227 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] [2022-03-01 18:01:27,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:27,428 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 [2022-03-01 18:01:27,428 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1169351643, now seen corresponding path program 9 times [2022-03-01 18:01:27,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:27,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017732018] [2022-03-01 18:01:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:27,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:27,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:27,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017732018] [2022-03-01 18:01:27,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017732018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:27,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415396435] [2022-03-01 18:01:27,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:01:27,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:27,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:27,688 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:27,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-01 18:01:27,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:01:27,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:27,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:01:27,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:28,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:28,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:28,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:28,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:28,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:01:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:28,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:28,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:28,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:28,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:01:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:28,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415396435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:28,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:28,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:01:28,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091089897] [2022-03-01 18:01:28,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:28,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:01:28,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:28,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:01:28,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:01:28,585 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) [2022-03-01 18:01:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:29,552 INFO L93 Difference]: Finished difference Result 3115 states and 10344 transitions. [2022-03-01 18:01:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:01:29,553 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 [2022-03-01 18:01:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:29,559 INFO L225 Difference]: With dead ends: 3115 [2022-03-01 18:01:29,559 INFO L226 Difference]: Without dead ends: 3109 [2022-03-01 18:01:29,559 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 [2022-03-01 18:01:29,559 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 [2022-03-01 18:01:29,559 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] [2022-03-01 18:01:29,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-03-01 18:01:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 2831. [2022-03-01 18:01:29,590 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) [2022-03-01 18:01:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 9389 transitions. [2022-03-01 18:01:29,595 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 9389 transitions. Word has length 24 [2022-03-01 18:01:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:29,595 INFO L470 AbstractCegarLoop]: Abstraction has 2831 states and 9389 transitions. [2022-03-01 18:01:29,595 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) [2022-03-01 18:01:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 9389 transitions. [2022-03-01 18:01:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:29,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:29,599 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] [2022-03-01 18:01:29,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:29,799 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 [2022-03-01 18:01:29,800 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:29,800 INFO L85 PathProgramCache]: Analyzing trace with hash 979444893, now seen corresponding path program 10 times [2022-03-01 18:01:29,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:29,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287975097] [2022-03-01 18:01:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:29,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:30,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:30,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287975097] [2022-03-01 18:01:30,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287975097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:30,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157103384] [2022-03-01 18:01:30,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:01:30,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:30,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:30,067 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:30,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-01 18:01:30,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:01:30,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:30,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:30,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:30,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:30,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:30,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:30,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:30,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:30,647 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:01:30,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:01:30,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:30,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:30,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:30,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:30,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:30,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157103384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:30,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:30,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:01:30,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27615656] [2022-03-01 18:01:30,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:30,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:01:30,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:01:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:01:30,715 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) [2022-03-01 18:01:31,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:31,760 INFO L93 Difference]: Finished difference Result 3104 states and 10273 transitions. [2022-03-01 18:01:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:01:31,761 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 [2022-03-01 18:01:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:31,766 INFO L225 Difference]: With dead ends: 3104 [2022-03-01 18:01:31,767 INFO L226 Difference]: Without dead ends: 3090 [2022-03-01 18:01:31,767 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 [2022-03-01 18:01:31,767 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:31,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 109 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1319 Invalid, 0 Unknown, 458 Unchecked, 0.6s Time] [2022-03-01 18:01:31,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2022-03-01 18:01:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2827. [2022-03-01 18:01:31,814 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) [2022-03-01 18:01:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 9381 transitions. [2022-03-01 18:01:31,822 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 9381 transitions. Word has length 24 [2022-03-01 18:01:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:31,822 INFO L470 AbstractCegarLoop]: Abstraction has 2827 states and 9381 transitions. [2022-03-01 18:01:31,822 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) [2022-03-01 18:01:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 9381 transitions. [2022-03-01 18:01:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:31,828 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:31,828 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] [2022-03-01 18:01:31,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-03-01 18:01:32,043 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 [2022-03-01 18:01:32,043 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1715641972, now seen corresponding path program 20 times [2022-03-01 18:01:32,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:32,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148154752] [2022-03-01 18:01:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:32,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:32,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:32,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148154752] [2022-03-01 18:01:32,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148154752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:32,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396979956] [2022-03-01 18:01:32,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:01:32,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:32,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:32,256 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:32,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-01 18:01:32,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:01:32,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:32,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:01:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:32,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:32,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:32,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:32,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:32,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:32,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:33,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:33,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:33,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:01:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:33,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396979956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:33,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:33,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-01 18:01:33,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762665409] [2022-03-01 18:01:33,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:33,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:01:33,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:33,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:01:33,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:01:33,339 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) [2022-03-01 18:01:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:35,319 INFO L93 Difference]: Finished difference Result 3858 states and 12515 transitions. [2022-03-01 18:01:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:01:35,320 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 [2022-03-01 18:01:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:35,328 INFO L225 Difference]: With dead ends: 3858 [2022-03-01 18:01:35,328 INFO L226 Difference]: Without dead ends: 3854 [2022-03-01 18:01:35,328 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 [2022-03-01 18:01:35,329 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 [2022-03-01 18:01:35,329 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] [2022-03-01 18:01:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2022-03-01 18:01:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 2849. [2022-03-01 18:01:35,370 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) [2022-03-01 18:01:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 9442 transitions. [2022-03-01 18:01:35,376 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 9442 transitions. Word has length 24 [2022-03-01 18:01:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:35,376 INFO L470 AbstractCegarLoop]: Abstraction has 2849 states and 9442 transitions. [2022-03-01 18:01:35,376 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) [2022-03-01 18:01:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 9442 transitions. [2022-03-01 18:01:35,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:35,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:35,380 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] [2022-03-01 18:01:35,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:35,580 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 [2022-03-01 18:01:35,581 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:35,581 INFO L85 PathProgramCache]: Analyzing trace with hash 425277236, now seen corresponding path program 21 times [2022-03-01 18:01:35,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:35,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952096410] [2022-03-01 18:01:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:35,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:35,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:35,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952096410] [2022-03-01 18:01:35,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952096410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:35,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544695586] [2022-03-01 18:01:35,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:01:35,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:35,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:35,790 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:35,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-01 18:01:35,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:01:35,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:35,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:01:35,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:36,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:36,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:36,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:36,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:36,150 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 18:01:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:36,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:36,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:36,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:36,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:36,863 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 [2022-03-01 18:01:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:36,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544695586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:36,953 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:36,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-01 18:01:36,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268287163] [2022-03-01 18:01:36,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:36,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:01:36,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:01:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:01:36,954 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) [2022-03-01 18:01:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:39,692 INFO L93 Difference]: Finished difference Result 4571 states and 14831 transitions. [2022-03-01 18:01:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-01 18:01:39,692 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 [2022-03-01 18:01:39,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:39,701 INFO L225 Difference]: With dead ends: 4571 [2022-03-01 18:01:39,701 INFO L226 Difference]: Without dead ends: 4548 [2022-03-01 18:01:39,702 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 [2022-03-01 18:01:39,702 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 [2022-03-01 18:01:39,702 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] [2022-03-01 18:01:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2022-03-01 18:01:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 2893. [2022-03-01 18:01:39,752 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) [2022-03-01 18:01:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 9552 transitions. [2022-03-01 18:01:39,759 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 9552 transitions. Word has length 24 [2022-03-01 18:01:39,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:39,760 INFO L470 AbstractCegarLoop]: Abstraction has 2893 states and 9552 transitions. [2022-03-01 18:01:39,760 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) [2022-03-01 18:01:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 9552 transitions. [2022-03-01 18:01:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:39,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:39,764 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] [2022-03-01 18:01:39,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-03-01 18:01:39,964 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 [2022-03-01 18:01:39,964 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:39,965 INFO L85 PathProgramCache]: Analyzing trace with hash -839168338, now seen corresponding path program 22 times [2022-03-01 18:01:39,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:39,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023651351] [2022-03-01 18:01:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:39,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:40,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:40,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023651351] [2022-03-01 18:01:40,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023651351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:40,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607284987] [2022-03-01 18:01:40,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:01:40,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:40,177 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:40,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-01 18:01:40,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:01:40,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:40,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:40,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:40,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:40,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:40,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:40,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:40,499 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 37 treesize of output 21 [2022-03-01 18:01:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:40,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:40,805 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:01:40,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:01:40,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:40,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:40,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:40,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607284987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:40,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:40,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:01:40,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121335879] [2022-03-01 18:01:40,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:40,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:01:40,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:40,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:01:40,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:01:40,881 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) [2022-03-01 18:01:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:42,621 INFO L93 Difference]: Finished difference Result 3909 states and 12712 transitions. [2022-03-01 18:01:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:01:42,622 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 [2022-03-01 18:01:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:42,629 INFO L225 Difference]: With dead ends: 3909 [2022-03-01 18:01:42,630 INFO L226 Difference]: Without dead ends: 3903 [2022-03-01 18:01:42,630 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 [2022-03-01 18:01:42,630 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:42,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 272 Invalid, 3470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2051 Invalid, 0 Unknown, 1388 Unchecked, 0.9s Time] [2022-03-01 18:01:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2022-03-01 18:01:42,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 2884. [2022-03-01 18:01:42,674 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) [2022-03-01 18:01:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 9533 transitions. [2022-03-01 18:01:42,681 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 9533 transitions. Word has length 24 [2022-03-01 18:01:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:42,681 INFO L470 AbstractCegarLoop]: Abstraction has 2884 states and 9533 transitions. [2022-03-01 18:01:42,681 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) [2022-03-01 18:01:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 9533 transitions. [2022-03-01 18:01:42,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:42,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:42,685 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] [2022-03-01 18:01:42,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-03-01 18:01:42,885 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 [2022-03-01 18:01:42,886 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:42,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:42,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1168030766, now seen corresponding path program 23 times [2022-03-01 18:01:42,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:42,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064132575] [2022-03-01 18:01:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:42,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:43,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:43,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064132575] [2022-03-01 18:01:43,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064132575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:43,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147394062] [2022-03-01 18:01:43,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:01:43,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:43,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:43,098 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) [2022-03-01 18:01:43,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-01 18:01:43,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:01:43,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:43,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:43,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:43,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:43,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:43,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:43,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:43,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:43,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:43,732 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:01:43,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:01:43,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:43,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:43,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:01:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:43,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147394062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:43,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:43,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:01:43,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452064802] [2022-03-01 18:01:43,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:43,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:01:43,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:43,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:01:43,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:01:43,797 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) [2022-03-01 18:01:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:45,197 INFO L93 Difference]: Finished difference Result 3563 states and 11679 transitions. [2022-03-01 18:01:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:01:45,198 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 [2022-03-01 18:01:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:45,221 INFO L225 Difference]: With dead ends: 3563 [2022-03-01 18:01:45,221 INFO L226 Difference]: Without dead ends: 3559 [2022-03-01 18:01:45,222 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 [2022-03-01 18:01:45,222 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 [2022-03-01 18:01:45,222 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] [2022-03-01 18:01:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2022-03-01 18:01:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2881. [2022-03-01 18:01:45,258 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) [2022-03-01 18:01:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9525 transitions. [2022-03-01 18:01:45,264 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9525 transitions. Word has length 24 [2022-03-01 18:01:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:45,264 INFO L470 AbstractCegarLoop]: Abstraction has 2881 states and 9525 transitions. [2022-03-01 18:01:45,264 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) [2022-03-01 18:01:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9525 transitions. [2022-03-01 18:01:45,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:45,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:45,268 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] [2022-03-01 18:01:45,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-03-01 18:01:45,468 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 [2022-03-01 18:01:45,468 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:45,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1862490956, now seen corresponding path program 24 times [2022-03-01 18:01:45,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:45,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574788328] [2022-03-01 18:01:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:45,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:45,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:45,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574788328] [2022-03-01 18:01:45,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574788328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:45,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110320081] [2022-03-01 18:01:45,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:01:45,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:45,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:45,679 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) [2022-03-01 18:01:45,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-01 18:01:45,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:01:45,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:45,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 18:01:45,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:46,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:46,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:46,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:46,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:01:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:46,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:47,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:47,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:47,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:47,278 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 41 treesize of output 7 [2022-03-01 18:01:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:47,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110320081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:47,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:47,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 18:01:47,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428668511] [2022-03-01 18:01:47,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:47,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:01:47,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:47,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:01:47,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:01:47,312 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) [2022-03-01 18:01:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:48,498 INFO L93 Difference]: Finished difference Result 3552 states and 11594 transitions. [2022-03-01 18:01:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:01:48,498 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 [2022-03-01 18:01:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:48,506 INFO L225 Difference]: With dead ends: 3552 [2022-03-01 18:01:48,506 INFO L226 Difference]: Without dead ends: 3550 [2022-03-01 18:01:48,506 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 [2022-03-01 18:01:48,506 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 [2022-03-01 18:01:48,506 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] [2022-03-01 18:01:48,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2022-03-01 18:01:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2881. [2022-03-01 18:01:48,546 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) [2022-03-01 18:01:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9527 transitions. [2022-03-01 18:01:48,552 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9527 transitions. Word has length 24 [2022-03-01 18:01:48,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:48,552 INFO L470 AbstractCegarLoop]: Abstraction has 2881 states and 9527 transitions. [2022-03-01 18:01:48,552 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) [2022-03-01 18:01:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9527 transitions. [2022-03-01 18:01:48,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:48,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:48,556 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] [2022-03-01 18:01:48,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-03-01 18:01:48,756 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 [2022-03-01 18:01:48,757 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2073766699, now seen corresponding path program 11 times [2022-03-01 18:01:48,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:48,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17932675] [2022-03-01 18:01:48,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:48,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:48,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:48,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17932675] [2022-03-01 18:01:48,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17932675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:48,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190297446] [2022-03-01 18:01:48,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:01:48,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:48,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:48,971 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) [2022-03-01 18:01:48,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-01 18:01:48,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:01:48,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:48,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:48,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:49,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:49,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:49,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:49,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:49,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:49,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:49,590 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:01:49,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:01:49,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:49,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:49,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:49,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:49,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:01:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:49,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190297446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:49,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:49,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:01:49,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631891929] [2022-03-01 18:01:49,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:49,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:01:49,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:49,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:01:49,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:01:49,661 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) [2022-03-01 18:01:51,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:51,443 INFO L93 Difference]: Finished difference Result 3635 states and 11750 transitions. [2022-03-01 18:01:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:01:51,444 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 [2022-03-01 18:01:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:51,451 INFO L225 Difference]: With dead ends: 3635 [2022-03-01 18:01:51,451 INFO L226 Difference]: Without dead ends: 3629 [2022-03-01 18:01:51,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=255, Invalid=2397, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:01:51,451 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 [2022-03-01 18:01:51,452 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] [2022-03-01 18:01:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2022-03-01 18:01:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 2899. [2022-03-01 18:01:51,491 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) [2022-03-01 18:01:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 9573 transitions. [2022-03-01 18:01:51,498 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 9573 transitions. Word has length 24 [2022-03-01 18:01:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:51,498 INFO L470 AbstractCegarLoop]: Abstraction has 2899 states and 9573 transitions. [2022-03-01 18:01:51,498 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) [2022-03-01 18:01:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 9573 transitions. [2022-03-01 18:01:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:51,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:51,502 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] [2022-03-01 18:01:51,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-03-01 18:01:51,703 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 [2022-03-01 18:01:51,703 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:51,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash -80281389, now seen corresponding path program 12 times [2022-03-01 18:01:51,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:51,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602862714] [2022-03-01 18:01:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:51,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:51,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:51,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602862714] [2022-03-01 18:01:51,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602862714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:51,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349061694] [2022-03-01 18:01:51,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:01:51,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:51,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:51,961 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) [2022-03-01 18:01:51,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-01 18:01:51,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:01:51,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:51,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:51,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:52,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:52,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:52,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:01:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:52,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:52,609 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:01:52,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:01:52,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:52,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:52,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:52,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:52,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:01:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:52,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349061694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:52,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:52,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:01:52,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435437925] [2022-03-01 18:01:52,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:52,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:01:52,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:01:52,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:01:52,684 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) [2022-03-01 18:01:54,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:54,340 INFO L93 Difference]: Finished difference Result 3653 states and 11797 transitions. [2022-03-01 18:01:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:01:54,340 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 [2022-03-01 18:01:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:54,347 INFO L225 Difference]: With dead ends: 3653 [2022-03-01 18:01:54,347 INFO L226 Difference]: Without dead ends: 3649 [2022-03-01 18:01:54,347 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 [2022-03-01 18:01:54,347 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 [2022-03-01 18:01:54,347 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] [2022-03-01 18:01:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3649 states. [2022-03-01 18:01:54,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3649 to 2897. [2022-03-01 18:01:54,384 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) [2022-03-01 18:01:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 9570 transitions. [2022-03-01 18:01:54,390 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 9570 transitions. Word has length 24 [2022-03-01 18:01:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:54,390 INFO L470 AbstractCegarLoop]: Abstraction has 2897 states and 9570 transitions. [2022-03-01 18:01:54,390 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) [2022-03-01 18:01:54,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 9570 transitions. [2022-03-01 18:01:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:54,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:54,394 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] [2022-03-01 18:01:54,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-03-01 18:01:54,594 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 [2022-03-01 18:01:54,594 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:54,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:54,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1344726963, now seen corresponding path program 13 times [2022-03-01 18:01:54,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:54,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600116731] [2022-03-01 18:01:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:54,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:54,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:54,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600116731] [2022-03-01 18:01:54,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600116731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:54,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646428825] [2022-03-01 18:01:54,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:01:54,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:54,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:54,856 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) [2022-03-01 18:01:54,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-01 18:01:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:54,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:54,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:55,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:55,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:55,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:55,199 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 18:01:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:55,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:55,520 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:01:55,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:01:55,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:55,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:55,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:55,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:01:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:55,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646428825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:55,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:55,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:01:55,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972662536] [2022-03-01 18:01:55,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:55,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:01:55,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:01:55,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:01:55,585 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) [2022-03-01 18:01:57,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:57,367 INFO L93 Difference]: Finished difference Result 3770 states and 12207 transitions. [2022-03-01 18:01:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:01:57,368 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 [2022-03-01 18:01:57,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:57,374 INFO L225 Difference]: With dead ends: 3770 [2022-03-01 18:01:57,374 INFO L226 Difference]: Without dead ends: 3765 [2022-03-01 18:01:57,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:01:57,374 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 [2022-03-01 18:01:57,375 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] [2022-03-01 18:01:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3765 states. [2022-03-01 18:01:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3765 to 2894. [2022-03-01 18:01:57,412 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) [2022-03-01 18:01:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 9566 transitions. [2022-03-01 18:01:57,418 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 9566 transitions. Word has length 24 [2022-03-01 18:01:57,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:57,418 INFO L470 AbstractCegarLoop]: Abstraction has 2894 states and 9566 transitions. [2022-03-01 18:01:57,418 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) [2022-03-01 18:01:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 9566 transitions. [2022-03-01 18:01:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:01:57,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:57,421 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] [2022-03-01 18:01:57,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-03-01 18:01:57,622 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 [2022-03-01 18:01:57,622 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:01:57,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:57,622 INFO L85 PathProgramCache]: Analyzing trace with hash -298378899, now seen corresponding path program 14 times [2022-03-01 18:01:57,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:57,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232098461] [2022-03-01 18:01:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:57,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:57,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:57,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232098461] [2022-03-01 18:01:57,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232098461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:57,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725240827] [2022-03-01 18:01:57,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:01:57,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:57,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:57,828 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) [2022-03-01 18:01:57,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-01 18:01:57,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:01:57,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:57,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:01:57,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:58,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:58,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:58,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:58,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:58,208 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 [2022-03-01 18:01:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:58,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:58,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:58,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:58,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:58,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:01:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:58,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725240827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:58,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:58,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 18:01:58,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046897650] [2022-03-01 18:01:58,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:58,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:01:58,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:58,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:01:58,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:01:58,893 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) [2022-03-01 18:02:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:00,912 INFO L93 Difference]: Finished difference Result 3599 states and 11791 transitions. [2022-03-01 18:02:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 18:02:00,912 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 [2022-03-01 18:02:00,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:00,919 INFO L225 Difference]: With dead ends: 3599 [2022-03-01 18:02:00,919 INFO L226 Difference]: Without dead ends: 3588 [2022-03-01 18:02:00,920 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 [2022-03-01 18:02:00,920 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 [2022-03-01 18:02:00,920 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] [2022-03-01 18:02:00,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-03-01 18:02:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 2903. [2022-03-01 18:02:00,956 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) [2022-03-01 18:02:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 9589 transitions. [2022-03-01 18:02:00,962 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 9589 transitions. Word has length 24 [2022-03-01 18:02:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:00,962 INFO L470 AbstractCegarLoop]: Abstraction has 2903 states and 9589 transitions. [2022-03-01 18:02:00,962 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) [2022-03-01 18:02:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 9589 transitions. [2022-03-01 18:02:00,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:00,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:00,966 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] [2022-03-01 18:02:00,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:01,166 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 [2022-03-01 18:02:01,166 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2095330258, now seen corresponding path program 3 times [2022-03-01 18:02:01,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:01,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440940765] [2022-03-01 18:02:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:01,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:01,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:01,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440940765] [2022-03-01 18:02:01,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440940765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:01,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048766499] [2022-03-01 18:02:01,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:02:01,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:01,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:01,372 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) [2022-03-01 18:02:01,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-01 18:02:01,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:02:01,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:01,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:02:01,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:01,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:01,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:01,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:01,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:01,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-03-01 18:02:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:01,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:02,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:02,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:02,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:02,478 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 [2022-03-01 18:02:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:02,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048766499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:02,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:02,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-01 18:02:02,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118314821] [2022-03-01 18:02:02,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:02,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:02:02,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:02:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:02:02,568 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) [2022-03-01 18:02:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:05,282 INFO L93 Difference]: Finished difference Result 4287 states and 14504 transitions. [2022-03-01 18:02:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 18:02:05,282 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 [2022-03-01 18:02:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:05,290 INFO L225 Difference]: With dead ends: 4287 [2022-03-01 18:02:05,290 INFO L226 Difference]: Without dead ends: 4283 [2022-03-01 18:02:05,291 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 [2022-03-01 18:02:05,291 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 [2022-03-01 18:02:05,291 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] [2022-03-01 18:02:05,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2022-03-01 18:02:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 2917. [2022-03-01 18:02:05,332 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) [2022-03-01 18:02:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 9623 transitions. [2022-03-01 18:02:05,338 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 9623 transitions. Word has length 24 [2022-03-01 18:02:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:05,338 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 9623 transitions. [2022-03-01 18:02:05,338 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) [2022-03-01 18:02:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 9623 transitions. [2022-03-01 18:02:05,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:05,342 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:05,342 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] [2022-03-01 18:02:05,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-03-01 18:02:05,542 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 [2022-03-01 18:02:05,543 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:05,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:05,543 INFO L85 PathProgramCache]: Analyzing trace with hash -485076915, now seen corresponding path program 15 times [2022-03-01 18:02:05,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:05,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559212148] [2022-03-01 18:02:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:05,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:05,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:05,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559212148] [2022-03-01 18:02:05,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559212148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:05,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708946619] [2022-03-01 18:02:05,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:02:05,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:05,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:05,754 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) [2022-03-01 18:02:05,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-01 18:02:05,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:02:05,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:05,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:02:05,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:06,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:06,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:06,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:06,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:06,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:02:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:06,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:06,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:06,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:06,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:06,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:02:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:06,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708946619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:06,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:06,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:02:06,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544504434] [2022-03-01 18:02:06,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:06,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:02:06,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:06,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:02:06,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:02:06,875 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) [2022-03-01 18:02:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:07,644 INFO L93 Difference]: Finished difference Result 4262 states and 14510 transitions. [2022-03-01 18:02:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 18:02:07,644 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 [2022-03-01 18:02:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:07,652 INFO L225 Difference]: With dead ends: 4262 [2022-03-01 18:02:07,652 INFO L226 Difference]: Without dead ends: 4257 [2022-03-01 18:02:07,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:02:07,652 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 [2022-03-01 18:02:07,652 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] [2022-03-01 18:02:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4257 states. [2022-03-01 18:02:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4257 to 2954. [2022-03-01 18:02:07,694 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) [2022-03-01 18:02:07,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9764 transitions. [2022-03-01 18:02:07,699 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9764 transitions. Word has length 24 [2022-03-01 18:02:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:07,699 INFO L470 AbstractCegarLoop]: Abstraction has 2954 states and 9764 transitions. [2022-03-01 18:02:07,700 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) [2022-03-01 18:02:07,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9764 transitions. [2022-03-01 18:02:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:07,703 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:07,703 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] [2022-03-01 18:02:07,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:07,903 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 [2022-03-01 18:02:07,904 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash 932179860, now seen corresponding path program 4 times [2022-03-01 18:02:07,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:07,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436254733] [2022-03-01 18:02:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:07,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:08,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:08,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436254733] [2022-03-01 18:02:08,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436254733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:08,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200361009] [2022-03-01 18:02:08,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:02:08,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:08,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:08,123 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) [2022-03-01 18:02:08,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-01 18:02:08,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:02:08,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:08,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:08,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:08,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:08,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:08,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:08,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:08,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:08,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:08,769 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:08,769 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 [2022-03-01 18:02:08,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:08,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:08,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:08,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:08,827 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 20 treesize of output 3 [2022-03-01 18:02:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:08,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200361009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:08,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:08,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:02:08,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46695591] [2022-03-01 18:02:08,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:08,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:02:08,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:02:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:02:08,845 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) [2022-03-01 18:02:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:10,534 INFO L93 Difference]: Finished difference Result 3975 states and 12950 transitions. [2022-03-01 18:02:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:02:10,534 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 [2022-03-01 18:02:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:10,542 INFO L225 Difference]: With dead ends: 3975 [2022-03-01 18:02:10,542 INFO L226 Difference]: Without dead ends: 3969 [2022-03-01 18:02:10,542 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 [2022-03-01 18:02:10,542 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 [2022-03-01 18:02:10,542 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] [2022-03-01 18:02:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2022-03-01 18:02:10,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 2940. [2022-03-01 18:02:10,580 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) [2022-03-01 18:02:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 9721 transitions. [2022-03-01 18:02:10,586 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 9721 transitions. Word has length 24 [2022-03-01 18:02:10,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:10,586 INFO L470 AbstractCegarLoop]: Abstraction has 2940 states and 9721 transitions. [2022-03-01 18:02:10,586 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) [2022-03-01 18:02:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 9721 transitions. [2022-03-01 18:02:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:10,590 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:10,590 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] [2022-03-01 18:02:10,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-03-01 18:02:10,790 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 [2022-03-01 18:02:10,790 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:10,791 INFO L85 PathProgramCache]: Analyzing trace with hash -611607669, now seen corresponding path program 16 times [2022-03-01 18:02:10,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:10,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803743380] [2022-03-01 18:02:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:10,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:11,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:11,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803743380] [2022-03-01 18:02:11,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803743380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:11,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911211390] [2022-03-01 18:02:11,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:02:11,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:11,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:11,035 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) [2022-03-01 18:02:11,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-01 18:02:11,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:02:11,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:11,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:11,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:11,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:11,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:11,339 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 18:02:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:11,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:11,627 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:11,627 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:02:11,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:11,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:11,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:11,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:11,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:11,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911211390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:11,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:11,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:02:11,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296248963] [2022-03-01 18:02:11,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:11,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:02:11,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:11,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:02:11,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:02:11,703 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) [2022-03-01 18:02:13,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:13,376 INFO L93 Difference]: Finished difference Result 4059 states and 13380 transitions. [2022-03-01 18:02:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:02:13,376 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 [2022-03-01 18:02:13,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:13,384 INFO L225 Difference]: With dead ends: 4059 [2022-03-01 18:02:13,384 INFO L226 Difference]: Without dead ends: 4053 [2022-03-01 18:02:13,384 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 [2022-03-01 18:02:13,384 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 [2022-03-01 18:02:13,384 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] [2022-03-01 18:02:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2022-03-01 18:02:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 2954. [2022-03-01 18:02:13,424 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) [2022-03-01 18:02:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9758 transitions. [2022-03-01 18:02:13,430 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9758 transitions. Word has length 24 [2022-03-01 18:02:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:13,430 INFO L470 AbstractCegarLoop]: Abstraction has 2954 states and 9758 transitions. [2022-03-01 18:02:13,430 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) [2022-03-01 18:02:13,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9758 transitions. [2022-03-01 18:02:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:13,434 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:13,434 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] [2022-03-01 18:02:13,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-03-01 18:02:13,634 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 [2022-03-01 18:02:13,635 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1875905164, now seen corresponding path program 5 times [2022-03-01 18:02:13,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:13,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030712191] [2022-03-01 18:02:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:13,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:13,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:13,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030712191] [2022-03-01 18:02:13,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030712191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:13,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800483086] [2022-03-01 18:02:13,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:02:13,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:13,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:13,860 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) [2022-03-01 18:02:13,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-01 18:02:13,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:02:13,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:13,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:13,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:14,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:14,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:14,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:14,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:14,172 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 33 treesize of output 17 [2022-03-01 18:02:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:14,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:14,460 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:14,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:02:14,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:14,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:14,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:02:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:14,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800483086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:14,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:14,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:02:14,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5256223] [2022-03-01 18:02:14,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:14,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:02:14,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:14,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:02:14,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:02:14,551 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) [2022-03-01 18:02:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:16,165 INFO L93 Difference]: Finished difference Result 4296 states and 14293 transitions. [2022-03-01 18:02:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:02:16,166 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 [2022-03-01 18:02:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:16,191 INFO L225 Difference]: With dead ends: 4296 [2022-03-01 18:02:16,191 INFO L226 Difference]: Without dead ends: 4286 [2022-03-01 18:02:16,192 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 [2022-03-01 18:02:16,192 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 [2022-03-01 18:02:16,192 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] [2022-03-01 18:02:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2022-03-01 18:02:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 2949. [2022-03-01 18:02:16,230 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) [2022-03-01 18:02:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 9744 transitions. [2022-03-01 18:02:16,236 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 9744 transitions. Word has length 24 [2022-03-01 18:02:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:16,237 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 9744 transitions. [2022-03-01 18:02:16,237 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) [2022-03-01 18:02:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 9744 transitions. [2022-03-01 18:02:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:16,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:16,241 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] [2022-03-01 18:02:16,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-03-01 18:02:16,441 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 [2022-03-01 18:02:16,441 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:16,442 INFO L85 PathProgramCache]: Analyzing trace with hash 545643768, now seen corresponding path program 25 times [2022-03-01 18:02:16,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:16,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891397410] [2022-03-01 18:02:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:16,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:16,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:16,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891397410] [2022-03-01 18:02:16,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891397410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:16,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293073457] [2022-03-01 18:02:16,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:02:16,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:16,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:16,650 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) [2022-03-01 18:02:16,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-01 18:02:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:16,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:16,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:16,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:16,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:16,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:17,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:17,276 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:17,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:02:17,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:17,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:17,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:17,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:17,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293073457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:17,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:17,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:02:17,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843875956] [2022-03-01 18:02:17,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:17,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:02:17,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:17,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:02:17,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:02:17,352 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) [2022-03-01 18:02:19,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:19,200 INFO L93 Difference]: Finished difference Result 3471 states and 11419 transitions. [2022-03-01 18:02:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:02:19,201 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 [2022-03-01 18:02:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:19,207 INFO L225 Difference]: With dead ends: 3471 [2022-03-01 18:02:19,207 INFO L226 Difference]: Without dead ends: 3465 [2022-03-01 18:02:19,208 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 [2022-03-01 18:02:19,208 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 [2022-03-01 18:02:19,208 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] [2022-03-01 18:02:19,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2022-03-01 18:02:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 2959. [2022-03-01 18:02:19,245 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) [2022-03-01 18:02:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 9775 transitions. [2022-03-01 18:02:19,251 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 9775 transitions. Word has length 24 [2022-03-01 18:02:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:19,251 INFO L470 AbstractCegarLoop]: Abstraction has 2959 states and 9775 transitions. [2022-03-01 18:02:19,252 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) [2022-03-01 18:02:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 9775 transitions. [2022-03-01 18:02:19,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:19,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:19,256 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] [2022-03-01 18:02:19,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-03-01 18:02:19,456 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 [2022-03-01 18:02:19,456 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:19,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1251307591, now seen corresponding path program 4 times [2022-03-01 18:02:19,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:19,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106849406] [2022-03-01 18:02:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:19,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:19,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:19,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106849406] [2022-03-01 18:02:19,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106849406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:19,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653066222] [2022-03-01 18:02:19,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:02:19,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:19,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:19,665 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) [2022-03-01 18:02:19,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-01 18:02:19,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:02:19,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:19,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:19,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:19,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:19,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:19,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:19,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:20,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:20,301 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:20,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:02:20,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:20,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:20,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:20,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653066222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:20,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:20,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:02:20,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330975638] [2022-03-01 18:02:20,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:20,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:02:20,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:20,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:02:20,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:02:20,383 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) [2022-03-01 18:02:22,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:22,362 INFO L93 Difference]: Finished difference Result 3567 states and 11758 transitions. [2022-03-01 18:02:22,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:02:22,363 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 [2022-03-01 18:02:22,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:22,369 INFO L225 Difference]: With dead ends: 3567 [2022-03-01 18:02:22,369 INFO L226 Difference]: Without dead ends: 3561 [2022-03-01 18:02:22,370 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 [2022-03-01 18:02:22,370 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:22,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 181 Invalid, 3114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2329 Invalid, 0 Unknown, 751 Unchecked, 1.0s Time] [2022-03-01 18:02:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2022-03-01 18:02:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2967. [2022-03-01 18:02:22,402 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) [2022-03-01 18:02:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 9797 transitions. [2022-03-01 18:02:22,408 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 9797 transitions. Word has length 24 [2022-03-01 18:02:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:22,408 INFO L470 AbstractCegarLoop]: Abstraction has 2967 states and 9797 transitions. [2022-03-01 18:02:22,408 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) [2022-03-01 18:02:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 9797 transitions. [2022-03-01 18:02:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:22,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:22,412 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] [2022-03-01 18:02:22,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:22,612 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 [2022-03-01 18:02:22,612 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash 123902901, now seen corresponding path program 5 times [2022-03-01 18:02:22,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:22,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054590477] [2022-03-01 18:02:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:22,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:22,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:22,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054590477] [2022-03-01 18:02:22,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054590477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:22,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267686032] [2022-03-01 18:02:22,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:02:22,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:22,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:22,823 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) [2022-03-01 18:02:22,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-01 18:02:22,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:02:22,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:22,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:22,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:23,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:23,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:23,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:23,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:23,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:23,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:23,472 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:23,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:02:23,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:23,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:23,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:23,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267686032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:23,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:23,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:02:23,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756741427] [2022-03-01 18:02:23,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:23,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:02:23,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:02:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:02:23,544 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) [2022-03-01 18:02:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:24,736 INFO L93 Difference]: Finished difference Result 3430 states and 11290 transitions. [2022-03-01 18:02:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:02:24,736 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 [2022-03-01 18:02:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:24,744 INFO L225 Difference]: With dead ends: 3430 [2022-03-01 18:02:24,744 INFO L226 Difference]: Without dead ends: 3428 [2022-03-01 18:02:24,744 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 [2022-03-01 18:02:24,744 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 [2022-03-01 18:02:24,744 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] [2022-03-01 18:02:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2022-03-01 18:02:24,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 2966. [2022-03-01 18:02:24,804 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) [2022-03-01 18:02:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 9794 transitions. [2022-03-01 18:02:24,810 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 9794 transitions. Word has length 24 [2022-03-01 18:02:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:24,810 INFO L470 AbstractCegarLoop]: Abstraction has 2966 states and 9794 transitions. [2022-03-01 18:02:24,810 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) [2022-03-01 18:02:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 9794 transitions. [2022-03-01 18:02:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:24,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:24,814 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] [2022-03-01 18:02:24,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-03-01 18:02:25,014 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 [2022-03-01 18:02:25,014 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 674726487, now seen corresponding path program 17 times [2022-03-01 18:02:25,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:25,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322908825] [2022-03-01 18:02:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:25,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:25,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:25,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322908825] [2022-03-01 18:02:25,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322908825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:25,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323618163] [2022-03-01 18:02:25,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:02:25,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:25,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:25,226 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) [2022-03-01 18:02:25,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-01 18:02:25,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:02:25,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:25,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:25,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:25,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:25,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:25,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-03-01 18:02:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:25,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:25,850 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:25,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:02:25,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:25,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:25,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:25,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:25,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:02:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:25,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323618163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:25,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:25,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:02:25,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854585018] [2022-03-01 18:02:25,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:25,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:02:25,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:25,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:02:25,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:02:25,923 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) [2022-03-01 18:02:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:26,974 INFO L93 Difference]: Finished difference Result 3474 states and 11435 transitions. [2022-03-01 18:02:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:02:26,974 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 [2022-03-01 18:02:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:26,981 INFO L225 Difference]: With dead ends: 3474 [2022-03-01 18:02:26,981 INFO L226 Difference]: Without dead ends: 3468 [2022-03-01 18:02:26,981 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 [2022-03-01 18:02:26,981 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 [2022-03-01 18:02:26,981 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] [2022-03-01 18:02:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2022-03-01 18:02:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 2969. [2022-03-01 18:02:27,016 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) [2022-03-01 18:02:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 9801 transitions. [2022-03-01 18:02:27,022 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 9801 transitions. Word has length 24 [2022-03-01 18:02:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:27,022 INFO L470 AbstractCegarLoop]: Abstraction has 2969 states and 9801 transitions. [2022-03-01 18:02:27,022 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) [2022-03-01 18:02:27,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 9801 transitions. [2022-03-01 18:02:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:27,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:27,025 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] [2022-03-01 18:02:27,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:27,226 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 [2022-03-01 18:02:27,226 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:27,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:27,226 INFO L85 PathProgramCache]: Analyzing trace with hash -589719087, now seen corresponding path program 18 times [2022-03-01 18:02:27,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:27,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735755122] [2022-03-01 18:02:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:27,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:27,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:27,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735755122] [2022-03-01 18:02:27,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735755122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:27,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268269859] [2022-03-01 18:02:27,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:02:27,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:27,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:27,436 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) [2022-03-01 18:02:27,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-01 18:02:27,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:02:27,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:27,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 18:02:27,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:28,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:28,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:28,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:02:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:28,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:29,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:29,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:29,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:29,066 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 41 treesize of output 7 [2022-03-01 18:02:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:29,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268269859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:29,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:29,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 18:02:29,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259517182] [2022-03-01 18:02:29,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:29,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:02:29,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:02:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:02:29,098 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) [2022-03-01 18:02:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:30,158 INFO L93 Difference]: Finished difference Result 3533 states and 11572 transitions. [2022-03-01 18:02:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:02:30,159 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 [2022-03-01 18:02:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:30,165 INFO L225 Difference]: With dead ends: 3533 [2022-03-01 18:02:30,165 INFO L226 Difference]: Without dead ends: 3523 [2022-03-01 18:02:30,165 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 [2022-03-01 18:02:30,165 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 130 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-03-01 18:02:30,165 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] [2022-03-01 18:02:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3523 states. [2022-03-01 18:02:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3523 to 2977. [2022-03-01 18:02:30,211 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) [2022-03-01 18:02:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 9824 transitions. [2022-03-01 18:02:30,216 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 9824 transitions. Word has length 24 [2022-03-01 18:02:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:30,216 INFO L470 AbstractCegarLoop]: Abstraction has 2977 states and 9824 transitions. [2022-03-01 18:02:30,216 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) [2022-03-01 18:02:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 9824 transitions. [2022-03-01 18:02:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:30,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:30,220 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] [2022-03-01 18:02:30,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-03-01 18:02:30,420 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 [2022-03-01 18:02:30,420 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:30,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1122224872, now seen corresponding path program 6 times [2022-03-01 18:02:30,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:30,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208878202] [2022-03-01 18:02:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:30,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:30,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:30,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208878202] [2022-03-01 18:02:30,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208878202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:30,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983857045] [2022-03-01 18:02:30,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:02:30,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:30,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:30,624 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) [2022-03-01 18:02:30,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-01 18:02:30,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:02:30,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:30,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:30,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:30,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:30,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:30,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:30,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:30,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:30,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:31,231 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:31,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:02:31,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:31,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:31,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:31,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:31,287 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 [2022-03-01 18:02:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:31,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983857045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:31,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:31,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-03-01 18:02:31,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35263617] [2022-03-01 18:02:31,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:31,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:02:31,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:02:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:02:31,304 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) [2022-03-01 18:02:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:32,904 INFO L93 Difference]: Finished difference Result 3598 states and 11823 transitions. [2022-03-01 18:02:32,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:02:32,905 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 [2022-03-01 18:02:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:32,911 INFO L225 Difference]: With dead ends: 3598 [2022-03-01 18:02:32,911 INFO L226 Difference]: Without dead ends: 3592 [2022-03-01 18:02:32,911 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 [2022-03-01 18:02:32,912 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:32,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 148 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1819 Invalid, 0 Unknown, 615 Unchecked, 0.8s Time] [2022-03-01 18:02:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2022-03-01 18:02:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 2970. [2022-03-01 18:02:32,958 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) [2022-03-01 18:02:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 9808 transitions. [2022-03-01 18:02:32,964 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 9808 transitions. Word has length 24 [2022-03-01 18:02:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:32,964 INFO L470 AbstractCegarLoop]: Abstraction has 2970 states and 9808 transitions. [2022-03-01 18:02:32,964 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) [2022-03-01 18:02:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 9808 transitions. [2022-03-01 18:02:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:32,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:32,968 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] [2022-03-01 18:02:32,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:33,168 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 [2022-03-01 18:02:33,168 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash -57853730, now seen corresponding path program 26 times [2022-03-01 18:02:33,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:33,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755053455] [2022-03-01 18:02:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:33,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:33,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:33,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755053455] [2022-03-01 18:02:33,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755053455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:33,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130577745] [2022-03-01 18:02:33,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:02:33,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:33,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:33,372 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) [2022-03-01 18:02:33,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-01 18:02:33,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:02:33,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:33,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:33,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:33,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:33,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:33,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:33,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:33,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:02:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:33,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:34,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:34,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:34,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:34,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:34,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:34,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130577745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:34,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:34,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 18:02:34,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487004826] [2022-03-01 18:02:34,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:34,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:02:34,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:34,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:02:34,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:02:34,441 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) [2022-03-01 18:02:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:36,798 INFO L93 Difference]: Finished difference Result 4051 states and 13632 transitions. [2022-03-01 18:02:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 18:02:36,798 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 [2022-03-01 18:02:36,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:36,805 INFO L225 Difference]: With dead ends: 4051 [2022-03-01 18:02:36,805 INFO L226 Difference]: Without dead ends: 4039 [2022-03-01 18:02:36,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=509, Invalid=5041, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:02:36,805 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 [2022-03-01 18:02:36,805 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] [2022-03-01 18:02:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2022-03-01 18:02:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 2993. [2022-03-01 18:02:36,839 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) [2022-03-01 18:02:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 9888 transitions. [2022-03-01 18:02:36,845 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 9888 transitions. Word has length 24 [2022-03-01 18:02:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:36,845 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 9888 transitions. [2022-03-01 18:02:36,845 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) [2022-03-01 18:02:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 9888 transitions. [2022-03-01 18:02:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:36,848 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:36,848 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] [2022-03-01 18:02:36,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-03-01 18:02:37,048 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 [2022-03-01 18:02:37,049 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:37,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1713164960, now seen corresponding path program 27 times [2022-03-01 18:02:37,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:37,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605917485] [2022-03-01 18:02:37,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:37,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:37,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:37,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605917485] [2022-03-01 18:02:37,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605917485] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:37,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569004078] [2022-03-01 18:02:37,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:02:37,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:37,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:37,271 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) [2022-03-01 18:02:37,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-01 18:02:37,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:02:37,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:37,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 18:02:37,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:37,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:37,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:37,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:37,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:37,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:02:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:37,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:38,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:38,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:38,123 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 [2022-03-01 18:02:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:38,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569004078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:38,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:38,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:02:38,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949537017] [2022-03-01 18:02:38,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:38,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:02:38,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:02:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:02:38,219 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) [2022-03-01 18:02:39,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:39,669 INFO L93 Difference]: Finished difference Result 3720 states and 12312 transitions. [2022-03-01 18:02:39,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:02:39,669 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 [2022-03-01 18:02:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:39,677 INFO L225 Difference]: With dead ends: 3720 [2022-03-01 18:02:39,677 INFO L226 Difference]: Without dead ends: 3714 [2022-03-01 18:02:39,677 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 [2022-03-01 18:02:39,677 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 [2022-03-01 18:02:39,677 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] [2022-03-01 18:02:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2022-03-01 18:02:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 3006. [2022-03-01 18:02:39,719 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) [2022-03-01 18:02:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 9929 transitions. [2022-03-01 18:02:39,725 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 9929 transitions. Word has length 24 [2022-03-01 18:02:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:39,725 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 9929 transitions. [2022-03-01 18:02:39,725 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) [2022-03-01 18:02:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 9929 transitions. [2022-03-01 18:02:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:39,740 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:39,740 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] [2022-03-01 18:02:39,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-03-01 18:02:39,940 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 [2022-03-01 18:02:39,941 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1968870974, now seen corresponding path program 28 times [2022-03-01 18:02:39,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:39,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098727419] [2022-03-01 18:02:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:40,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:40,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098727419] [2022-03-01 18:02:40,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098727419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:40,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215330121] [2022-03-01 18:02:40,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:02:40,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:40,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:40,149 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) [2022-03-01 18:02:40,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-01 18:02:40,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:02:40,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:40,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:40,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:40,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:40,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:40,484 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 [2022-03-01 18:02:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:40,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:40,802 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:40,803 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:02:40,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:40,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:40,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:40,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:40,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:40,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215330121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:40,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:40,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:02:40,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232039650] [2022-03-01 18:02:40,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:40,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:02:40,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:40,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:02:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:02:40,868 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) [2022-03-01 18:02:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:42,469 INFO L93 Difference]: Finished difference Result 3727 states and 12338 transitions. [2022-03-01 18:02:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:02:42,469 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 [2022-03-01 18:02:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:42,476 INFO L225 Difference]: With dead ends: 3727 [2022-03-01 18:02:42,476 INFO L226 Difference]: Without dead ends: 3721 [2022-03-01 18:02:42,477 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 [2022-03-01 18:02:42,477 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 [2022-03-01 18:02:42,477 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] [2022-03-01 18:02:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-03-01 18:02:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 2999. [2022-03-01 18:02:42,516 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) [2022-03-01 18:02:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 9906 transitions. [2022-03-01 18:02:42,522 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 9906 transitions. Word has length 24 [2022-03-01 18:02:42,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:42,522 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 9906 transitions. [2022-03-01 18:02:42,522 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) [2022-03-01 18:02:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 9906 transitions. [2022-03-01 18:02:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:42,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:42,526 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] [2022-03-01 18:02:42,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:42,727 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 [2022-03-01 18:02:42,727 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash 161416511, now seen corresponding path program 6 times [2022-03-01 18:02:42,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:42,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374383302] [2022-03-01 18:02:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:42,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:42,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:42,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374383302] [2022-03-01 18:02:42,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374383302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:42,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792326188] [2022-03-01 18:02:42,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:02:42,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:42,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:42,947 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) [2022-03-01 18:02:42,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-01 18:02:42,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:02:42,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:43,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:43,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:43,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:43,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:43,331 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 [2022-03-01 18:02:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:43,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:43,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:43,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:43,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:43,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:43,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:44,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792326188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:44,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:44,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 18:02:44,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681034994] [2022-03-01 18:02:44,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:44,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:02:44,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:44,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:02:44,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:02:44,010 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) [2022-03-01 18:02:47,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:47,789 INFO L93 Difference]: Finished difference Result 4885 states and 16541 transitions. [2022-03-01 18:02:47,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:02:47,789 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 [2022-03-01 18:02:47,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:47,799 INFO L225 Difference]: With dead ends: 4885 [2022-03-01 18:02:47,799 INFO L226 Difference]: Without dead ends: 4875 [2022-03-01 18:02:47,799 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 [2022-03-01 18:02:47,800 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 [2022-03-01 18:02:47,800 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] [2022-03-01 18:02:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-03-01 18:02:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3029. [2022-03-01 18:02:47,859 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) [2022-03-01 18:02:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 10008 transitions. [2022-03-01 18:02:47,865 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 10008 transitions. Word has length 24 [2022-03-01 18:02:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:47,865 INFO L470 AbstractCegarLoop]: Abstraction has 3029 states and 10008 transitions. [2022-03-01 18:02:47,865 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) [2022-03-01 18:02:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 10008 transitions. [2022-03-01 18:02:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:47,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:47,869 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] [2022-03-01 18:02:47,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-03-01 18:02:48,069 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 [2022-03-01 18:02:48,070 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:48,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1854805089, now seen corresponding path program 19 times [2022-03-01 18:02:48,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:48,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594743265] [2022-03-01 18:02:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:48,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:48,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:48,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594743265] [2022-03-01 18:02:48,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594743265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:48,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865345754] [2022-03-01 18:02:48,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:02:48,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:48,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:48,278 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) [2022-03-01 18:02:48,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-01 18:02:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:48,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:48,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:48,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:48,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:48,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:48,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:48,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:48,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:48,871 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:48,872 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:02:48,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:48,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:48,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:48,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:48,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:48,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865345754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:48,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:48,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:02:48,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551703597] [2022-03-01 18:02:48,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:48,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:02:48,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:02:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:02:48,951 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) [2022-03-01 18:02:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:50,562 INFO L93 Difference]: Finished difference Result 4651 states and 15957 transitions. [2022-03-01 18:02:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:02:50,562 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 [2022-03-01 18:02:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:50,590 INFO L225 Difference]: With dead ends: 4651 [2022-03-01 18:02:50,590 INFO L226 Difference]: Without dead ends: 4645 [2022-03-01 18:02:50,590 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 [2022-03-01 18:02:50,590 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 [2022-03-01 18:02:50,590 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] [2022-03-01 18:02:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4645 states. [2022-03-01 18:02:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4645 to 3043. [2022-03-01 18:02:50,629 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) [2022-03-01 18:02:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 10053 transitions. [2022-03-01 18:02:50,635 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 10053 transitions. Word has length 24 [2022-03-01 18:02:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:50,635 INFO L470 AbstractCegarLoop]: Abstraction has 3043 states and 10053 transitions. [2022-03-01 18:02:50,635 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) [2022-03-01 18:02:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 10053 transitions. [2022-03-01 18:02:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:50,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:50,639 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] [2022-03-01 18:02:50,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-03-01 18:02:50,839 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 [2022-03-01 18:02:50,839 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:50,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:50,840 INFO L85 PathProgramCache]: Analyzing trace with hash 588337472, now seen corresponding path program 7 times [2022-03-01 18:02:50,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:50,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8641260] [2022-03-01 18:02:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:50,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:51,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:51,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8641260] [2022-03-01 18:02:51,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8641260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:51,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136774824] [2022-03-01 18:02:51,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:02:51,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:51,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:51,046 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) [2022-03-01 18:02:51,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-01 18:02:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:51,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:51,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:51,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:51,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:51,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:51,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:51,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:51,658 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:51,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 43 [2022-03-01 18:02:51,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:51,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:51,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:51,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:51,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:02:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:51,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136774824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:51,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:51,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:02:51,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82079651] [2022-03-01 18:02:51,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:51,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:02:51,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:51,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:02:51,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:02:51,732 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) [2022-03-01 18:02:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:53,928 INFO L93 Difference]: Finished difference Result 4373 states and 14911 transitions. [2022-03-01 18:02:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:02:53,929 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 [2022-03-01 18:02:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:53,937 INFO L225 Difference]: With dead ends: 4373 [2022-03-01 18:02:53,937 INFO L226 Difference]: Without dead ends: 4371 [2022-03-01 18:02:53,937 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 [2022-03-01 18:02:53,937 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 [2022-03-01 18:02:53,938 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] [2022-03-01 18:02:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-03-01 18:02:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3056. [2022-03-01 18:02:53,980 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) [2022-03-01 18:02:53,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 10093 transitions. [2022-03-01 18:02:53,986 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 10093 transitions. Word has length 24 [2022-03-01 18:02:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:53,986 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 10093 transitions. [2022-03-01 18:02:53,987 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) [2022-03-01 18:02:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 10093 transitions. [2022-03-01 18:02:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:53,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:53,991 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] [2022-03-01 18:02:54,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-01 18:02:54,192 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 [2022-03-01 18:02:54,192 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1982548168, now seen corresponding path program 29 times [2022-03-01 18:02:54,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:54,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201599933] [2022-03-01 18:02:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:54,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:54,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:54,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201599933] [2022-03-01 18:02:54,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201599933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:54,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335922359] [2022-03-01 18:02:54,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:02:54,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:54,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:54,397 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) [2022-03-01 18:02:54,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-01 18:02:54,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:02:54,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:54,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:54,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:54,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:54,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:54,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:54,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:02:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:54,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:54,985 INFO L353 Elim1Store]: treesize reduction 18, result has 66.0 percent of original size [2022-03-01 18:02:54,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-01 18:02:55,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:55,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:55,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:55,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:55,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-01 18:02:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:55,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335922359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:55,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:55,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-03-01 18:02:55,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007968755] [2022-03-01 18:02:55,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:55,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 18:02:55,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:55,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 18:02:55,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:02:55,060 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) [2022-03-01 18:02:56,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:56,906 INFO L93 Difference]: Finished difference Result 4072 states and 13690 transitions. [2022-03-01 18:02:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:02:56,906 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 [2022-03-01 18:02:56,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:56,913 INFO L225 Difference]: With dead ends: 4072 [2022-03-01 18:02:56,913 INFO L226 Difference]: Without dead ends: 4066 [2022-03-01 18:02:56,914 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 [2022-03-01 18:02:56,914 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 [2022-03-01 18:02:56,914 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] [2022-03-01 18:02:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2022-03-01 18:02:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 3081. [2022-03-01 18:02:56,950 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) [2022-03-01 18:02:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 10170 transitions. [2022-03-01 18:02:56,956 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 10170 transitions. Word has length 24 [2022-03-01 18:02:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:56,956 INFO L470 AbstractCegarLoop]: Abstraction has 3081 states and 10170 transitions. [2022-03-01 18:02:56,956 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) [2022-03-01 18:02:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 10170 transitions. [2022-03-01 18:02:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:02:56,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:56,960 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] [2022-03-01 18:02:56,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-03-01 18:02:57,160 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 [2022-03-01 18:02:57,160 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:02:57,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:57,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2115905623, now seen corresponding path program 20 times [2022-03-01 18:02:57,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:57,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115592147] [2022-03-01 18:02:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:57,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:57,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:57,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115592147] [2022-03-01 18:02:57,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115592147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:57,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449922739] [2022-03-01 18:02:57,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:02:57,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:57,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:57,377 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) [2022-03-01 18:02:57,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-01 18:02:57,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:02:57,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:57,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:02:57,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:57,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:57,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:57,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-03-01 18:02:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:57,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:58,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:58,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:58,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:58,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:58,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-01 18:02:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:58,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449922739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:58,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:58,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 18:02:58,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653475336] [2022-03-01 18:02:58,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:58,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:02:58,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:02:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:02:58,350 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) [2022-03-01 18:03:01,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:03:01,446 INFO L93 Difference]: Finished difference Result 3823 states and 12504 transitions. [2022-03-01 18:03:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:03:01,447 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 [2022-03-01 18:03:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:03:01,453 INFO L225 Difference]: With dead ends: 3823 [2022-03-01 18:03:01,453 INFO L226 Difference]: Without dead ends: 3811 [2022-03-01 18:03:01,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=636, Invalid=5844, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 18:03:01,454 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 196 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1904 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 755 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:03:01,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 289 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1904 Invalid, 0 Unknown, 755 Unchecked, 0.9s Time] [2022-03-01 18:03:01,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2022-03-01 18:03:01,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3149. [2022-03-01 18:03:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 3.3049555273189326) internal successors, (10404), 3148 states have internal predecessors, (10404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 10404 transitions. [2022-03-01 18:03:01,510 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 10404 transitions. Word has length 24 [2022-03-01 18:03:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:03:01,510 INFO L470 AbstractCegarLoop]: Abstraction has 3149 states and 10404 transitions. [2022-03-01 18:03:01,510 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) [2022-03-01 18:03:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 10404 transitions. [2022-03-01 18:03:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:03:01,514 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:03:01,514 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] [2022-03-01 18:03:01,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-03-01 18:03:01,714 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 [2022-03-01 18:03:01,715 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2022-03-01 18:03:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:03:01,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2007880862, now seen corresponding path program 30 times [2022-03-01 18:03:01,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:03:01,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979140951] [2022-03-01 18:03:01,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:03:01,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:03:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:03:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:01,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:03:01,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979140951] [2022-03-01 18:03:01,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979140951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:03:01,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652391279] [2022-03-01 18:03:01,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:03:01,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:03:01,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:03:01,924 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:03:01,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-01 18:03:01,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:03:01,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:03:01,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 18:03:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:03:02,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:03:02,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:03:02,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:03:02,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:03:02,252 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 [2022-03-01 18:03:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:02,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:03:02,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:03:02,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:03:02,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:03:02,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:03:02,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-03-01 18:03:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:02,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652391279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:03:02,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:03:02,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2022-03-01 18:03:02,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813577912] [2022-03-01 18:03:02,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:03:02,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:03:02,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:03:02,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:03:02,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:03:02,999 INFO L87 Difference]: Start difference. First operand 3149 states and 10404 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) Received shutdown request... [2022-03-01 18:03:03,930 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:03:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:03:03,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:03:03,932 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 55 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 523 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:03:03,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 17 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 801 Invalid, 0 Unknown, 523 Unchecked, 0.3s Time] [2022-03-01 18:03:03,933 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (6 of 7 remaining) [2022-03-01 18:03:03,947 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:03:03,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-03-01 18:03:04,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:03:04,134 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (3149states) and FLOYD_HOARE automaton (currently 29 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (461 states constructed, input type IntersectNwa). [2022-03-01 18:03:04,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4INUSE_VIOLATION (5 of 7 remaining) [2022-03-01 18:03:04,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5INUSE_VIOLATION (4 of 7 remaining) [2022-03-01 18:03:04,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (3 of 7 remaining) [2022-03-01 18:03:04,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (2 of 7 remaining) [2022-03-01 18:03:04,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err0INUSE_VIOLATION (1 of 7 remaining) [2022-03-01 18:03:04,136 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err1INUSE_VIOLATION (0 of 7 remaining) [2022-03-01 18:03:04,139 INFO L732 BasicCegarLoop]: Path program histogram: [145, 30, 25, 25, 21, 20, 7, 6, 6, 6, 3, 2, 2, 1, 1] [2022-03-01 18:03:04,141 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:03:04,141 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:03:04,142 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:03:04 BasicIcfg [2022-03-01 18:03:04,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:03:04,142 INFO L158 Benchmark]: Toolchain (without parser) took 746523.10ms. Allocated memory was 175.1MB in the beginning and 313.5MB in the end (delta: 138.4MB). Free memory was 132.5MB in the beginning and 67.9MB in the end (delta: 64.6MB). Peak memory consumption was 203.5MB. Max. memory is 8.0GB. [2022-03-01 18:03:04,143 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 175.1MB. Free memory is still 133.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:03:04,143 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.16ms. Allocated memory is still 175.1MB. Free memory was 132.4MB in the beginning and 130.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:03:04,143 INFO L158 Benchmark]: Boogie Preprocessor took 18.84ms. Allocated memory is still 175.1MB. Free memory was 130.9MB in the beginning and 129.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:03:04,143 INFO L158 Benchmark]: RCFGBuilder took 235.31ms. Allocated memory is still 175.1MB. Free memory was 129.9MB in the beginning and 119.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-01 18:03:04,143 INFO L158 Benchmark]: TraceAbstraction took 746240.50ms. Allocated memory was 175.1MB in the beginning and 313.5MB in the end (delta: 138.4MB). Free memory was 119.4MB in the beginning and 67.9MB in the end (delta: 51.4MB). Peak memory consumption was 190.9MB. Max. memory is 8.0GB. [2022-03-01 18:03:04,143 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 0.14ms. Allocated memory is still 175.1MB. Free memory is still 133.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.16ms. Allocated memory is still 175.1MB. Free memory was 132.4MB in the beginning and 130.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.84ms. Allocated memory is still 175.1MB. Free memory was 130.9MB in the beginning and 129.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 235.31ms. Allocated memory is still 175.1MB. Free memory was 129.9MB in the beginning and 119.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 746240.50ms. Allocated memory was 175.1MB in the beginning and 313.5MB in the end (delta: 138.4MB). Free memory was 119.4MB in the beginning and 67.9MB in the end (delta: 51.4MB). Peak memory consumption was 190.9MB. 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 (3149states) and FLOYD_HOARE automaton (currently 29 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (461 states constructed, input type IntersectNwa). - 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 (3149states) and FLOYD_HOARE automaton (currently 29 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (461 states constructed, input type IntersectNwa). - 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 (3149states) and FLOYD_HOARE automaton (currently 29 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (461 states constructed, input type IntersectNwa). - 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 (3149states) and FLOYD_HOARE automaton (currently 29 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (461 states constructed, input type IntersectNwa). - 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 (3149states) and FLOYD_HOARE automaton (currently 29 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (461 states constructed, input type IntersectNwa). - 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 (3149states) and FLOYD_HOARE automaton (currently 29 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (461 states constructed, input type IntersectNwa). - 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 (3149states) and FLOYD_HOARE automaton (currently 29 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (461 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 746.1s, OverallIterations: 300, TraceHistogramMax: 2, PathProgramHistogramMax: 145, EmptinessCheckTime: 0.7s, AutomataDifference: 409.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 46957 SdHoareTripleChecker+Valid, 153.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 46957 mSDsluCounter, 42824 SdHoareTripleChecker+Invalid, 129.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 172007 IncrementalHoareTripleChecker+Unchecked, 242714 mSDsCounter, 12464 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 354278 IncrementalHoareTripleChecker+Invalid, 538749 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12464 mSolverCounterUnsat, 3769 mSDtfsCounter, 354278 mSolverCounterSat, 1.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23442 GetRequests, 8901 SyntacticMatches, 1462 SemanticMatches, 13079 ConstructedPredicates, 0 IntricatePredicates, 81 DeprecatedPredicates, 177814 ImplicationChecksByTransitivity, 358.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3149occurred in iteration=299, InterpolantAutomatonStates: 10391, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.9s AutomataMinimizationTime, 299 MinimizatonAttempts, 176089 StatesRemovedByMinimization, 298 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 259.8s InterpolantComputationTime, 13436 NumberOfCodeBlocks, 13436 NumberOfCodeBlocksAsserted, 918 NumberOfCheckSat, 19172 ConstructedInterpolants, 2870 QuantifiedInterpolants, 340740 SizeOfPredicates, 2638 NumberOfNonLiveVariables, 23142 ConjunctsInSsa, 8056 ConjunctsInUnsatCore, 876 InterpolantComputations, 12 PerfectInterpolantSequences, 238/5212 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