/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 15:41:17,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 15:41:17,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 15:41:17,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 15:41:17,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 15:41:17,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 15:41:17,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 15:41:17,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 15:41:17,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 15:41:17,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 15:41:17,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 15:41:17,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-18 15:41:17,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 15:41:17,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 15:41:17,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 15:41:17,887 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-Separate.epf [2022-01-18 15:41:17,905 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 15:41:17,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 15:41:17,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 15:41:17,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 15:41:17,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 15:41:17,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 15:41:17,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 15:41:17,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 15:41:17,907 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 15:41:17,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 15:41:17,907 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 15:41:17,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 15:41:17,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 15:41:17,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 15:41:17,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 15:41:17,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 15:41:17,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 15:41:17,907 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 15:41:17,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 15:41:17,908 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 15:41:17,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 15:41:17,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 15:41:17,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 15:41:17,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 15:41:17,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 15:41:17,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:41:17,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 15:41:17,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 15:41:17,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 15:41:17,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 15:41:17,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 15:41:17,909 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 15:41:17,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 15:41:17,909 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 15:41:17,909 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 15:41:18,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 15:41:18,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 15:41:18,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 15:41:18,060 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 15:41:18,061 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 15:41:18,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl [2022-01-18 15:41:18,062 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl' [2022-01-18 15:41:18,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 15:41:18,080 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 15:41:18,080 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 15:41:18,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 15:41:18,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 15:41:18,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:41:18" (1/1) ... [2022-01-18 15:41:18,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:41:18" (1/1) ... [2022-01-18 15:41:18,096 INFO L137 Inliner]: procedures = 7, calls = 6, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 15:41:18,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 15:41:18,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 15:41:18,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 15:41:18,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 15:41:18,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:41:18" (1/1) ... [2022-01-18 15:41:18,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:41:18" (1/1) ... [2022-01-18 15:41:18,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:41:18" (1/1) ... [2022-01-18 15:41:18,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:41:18" (1/1) ... [2022-01-18 15:41:18,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:41:18" (1/1) ... [2022-01-18 15:41:18,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:41:18" (1/1) ... [2022-01-18 15:41:18,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:41:18" (1/1) ... [2022-01-18 15:41:18,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 15:41:18,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 15:41:18,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 15:41:18,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 15:41:18,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:41:18" (1/1) ... [2022-01-18 15:41:18,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:41:18,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:18,129 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) [2022-01-18 15:41:18,151 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 [2022-01-18 15:41:18,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 15:41:18,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 15:41:18,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 15:41:18,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 15:41:18,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 15:41:18,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 15:41:18,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 15:41:18,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 15:41:18,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 15:41:18,158 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 15:41:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 15:41:18,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 15:41:18,158 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 15:41:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 15:41:18,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 15:41:18,158 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-01-18 15:41:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-01-18 15:41:18,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-01-18 15:41:18,158 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2022-01-18 15:41:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-01-18 15:41:18,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-01-18 15:41:18,159 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 15:41:18,201 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 15:41:18,202 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 15:41:18,351 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 15:41:18,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 15:41:18,368 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-18 15:41:18,369 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-01-18 15:41:18,369 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-01-18 15:41:18,369 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2022-01-18 15:41:18,369 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2022-01-18 15:41:18,370 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:41:18 BoogieIcfgContainer [2022-01-18 15:41:18,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 15:41:18,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 15:41:18,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 15:41:18,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 15:41:18,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:41:18" (1/2) ... [2022-01-18 15:41:18,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bfa276 and model type parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:41:18, skipping insertion in model container [2022-01-18 15:41:18,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:41:18" (2/2) ... [2022-01-18 15:41:18,391 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1-dsl.wvr.bpl [2022-01-18 15:41:18,394 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 15:41:18,394 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 15:41:18,394 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 15:41:18,394 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 15:41:18,480 INFO L148 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-01-18 15:41:18,516 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 15:41:18,520 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, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 15:41:18,521 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-01-18 15:41:18,537 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2022-01-18 15:41:18,608 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:41:18,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:18,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:18,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:18,629 INFO L85 PathProgramCache]: Analyzing trace with hash -296525747, now seen corresponding path program 1 times [2022-01-18 15:41:18,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:18,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103804424] [2022-01-18 15:41:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:18,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:18,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103804424] [2022-01-18 15:41:18,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103804424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:41:18,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:41:18,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:41:18,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23691643] [2022-01-18 15:41:18,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:41:18,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:41:18,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:18,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:41:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:41:18,805 INFO L87 Difference]: Start difference. First operand has 403 states, 402 states have (on average 3.8855721393034828) internal successors, (1562), 402 states have internal predecessors, (1562), 0 states have call successors, (0), 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 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:19,000 INFO L93 Difference]: Finished difference Result 1089 states and 4336 transitions. [2022-01-18 15:41:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:41:19,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2022-01-18 15:41:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:19,032 INFO L225 Difference]: With dead ends: 1089 [2022-01-18 15:41:19,033 INFO L226 Difference]: Without dead ends: 1068 [2022-01-18 15:41:19,035 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 [2022-01-18 15:41:19,039 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:19,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 16 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:19,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-01-18 15:41:19,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 525. [2022-01-18 15:41:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.881679389312977) internal successors, (2034), 524 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 2034 transitions. [2022-01-18 15:41:19,160 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 2034 transitions. Word has length 22 [2022-01-18 15:41:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:19,160 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 2034 transitions. [2022-01-18 15:41:19,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 2034 transitions. [2022-01-18 15:41:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 15:41:19,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:19,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:19,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 15:41:19,166 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:19,166 INFO L85 PathProgramCache]: Analyzing trace with hash -908802327, now seen corresponding path program 2 times [2022-01-18 15:41:19,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:19,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492332707] [2022-01-18 15:41:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:19,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:19,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:19,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492332707] [2022-01-18 15:41:19,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492332707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:41:19,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:41:19,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:41:19,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466544825] [2022-01-18 15:41:19,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:41:19,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:41:19,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:19,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:41:19,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:41:19,271 INFO L87 Difference]: Start difference. First operand 525 states and 2034 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:19,387 INFO L93 Difference]: Finished difference Result 1218 states and 4830 transitions. [2022-01-18 15:41:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:41:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2022-01-18 15:41:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:19,394 INFO L225 Difference]: With dead ends: 1218 [2022-01-18 15:41:19,394 INFO L226 Difference]: Without dead ends: 1197 [2022-01-18 15:41:19,397 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 [2022-01-18 15:41:19,402 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:19,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 22 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2022-01-18 15:41:19,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 545. [2022-01-18 15:41:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.8529411764705883) internal successors, (2096), 544 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2096 transitions. [2022-01-18 15:41:19,436 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2096 transitions. Word has length 22 [2022-01-18 15:41:19,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:19,436 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 2096 transitions. [2022-01-18 15:41:19,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,437 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2096 transitions. [2022-01-18 15:41:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:19,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:19,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:19,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 15:41:19,440 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:19,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1277738927, now seen corresponding path program 1 times [2022-01-18 15:41:19,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:19,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053287378] [2022-01-18 15:41:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:19,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:19,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:19,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053287378] [2022-01-18 15:41:19,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053287378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:41:19,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:41:19,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 15:41:19,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736378242] [2022-01-18 15:41:19,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:41:19,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 15:41:19,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:19,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 15:41:19,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 15:41:19,488 INFO L87 Difference]: Start difference. First operand 545 states and 2096 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:19,529 INFO L93 Difference]: Finished difference Result 545 states and 1997 transitions. [2022-01-18 15:41:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 15:41:19,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:41:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:19,532 INFO L225 Difference]: With dead ends: 545 [2022-01-18 15:41:19,532 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 15:41:19,532 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 [2022-01-18 15:41:19,536 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:19,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 18 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:41:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 15:41:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2022-01-18 15:41:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.6761363636363638) internal successors, (1941), 528 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1941 transitions. [2022-01-18 15:41:19,551 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1941 transitions. Word has length 24 [2022-01-18 15:41:19,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:19,551 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1941 transitions. [2022-01-18 15:41:19,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,551 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1941 transitions. [2022-01-18 15:41:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:19,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:19,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:19,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 15:41:19,553 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1945379311, now seen corresponding path program 2 times [2022-01-18 15:41:19,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:19,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018394833] [2022-01-18 15:41:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:19,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:19,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:19,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018394833] [2022-01-18 15:41:19,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018394833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:41:19,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:41:19,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:41:19,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134371440] [2022-01-18 15:41:19,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:41:19,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:41:19,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:19,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:41:19,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:41:19,603 INFO L87 Difference]: Start difference. First operand 529 states and 1941 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:19,770 INFO L93 Difference]: Finished difference Result 1358 states and 5017 transitions. [2022-01-18 15:41:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:41:19,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:41:19,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:19,777 INFO L225 Difference]: With dead ends: 1358 [2022-01-18 15:41:19,777 INFO L226 Difference]: Without dead ends: 1346 [2022-01-18 15:41:19,778 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 [2022-01-18 15:41:19,781 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:19,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 65 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-01-18 15:41:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 680. [2022-01-18 15:41:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.787923416789396) internal successors, (2572), 679 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2572 transitions. [2022-01-18 15:41:19,820 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2572 transitions. Word has length 24 [2022-01-18 15:41:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:19,821 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2572 transitions. [2022-01-18 15:41:19,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2572 transitions. [2022-01-18 15:41:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:19,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:19,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:19,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 15:41:19,823 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:19,824 INFO L85 PathProgramCache]: Analyzing trace with hash 58537094, now seen corresponding path program 1 times [2022-01-18 15:41:19,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:19,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333397310] [2022-01-18 15:41:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:19,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:19,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:19,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333397310] [2022-01-18 15:41:19,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333397310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:41:19,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:41:19,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 15:41:19,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407453168] [2022-01-18 15:41:19,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:41:19,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 15:41:19,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 15:41:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 15:41:19,870 INFO L87 Difference]: Start difference. First operand 680 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:19,911 INFO L93 Difference]: Finished difference Result 652 states and 2325 transitions. [2022-01-18 15:41:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 15:41:19,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:41:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:19,915 INFO L225 Difference]: With dead ends: 652 [2022-01-18 15:41:19,915 INFO L226 Difference]: Without dead ends: 604 [2022-01-18 15:41:19,915 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 [2022-01-18 15:41:19,918 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:19,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:41:19,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-18 15:41:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2022-01-18 15:41:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.583747927031509) internal successors, (2161), 603 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2161 transitions. [2022-01-18 15:41:19,933 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2161 transitions. Word has length 24 [2022-01-18 15:41:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:19,933 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 2161 transitions. [2022-01-18 15:41:19,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,934 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2161 transitions. [2022-01-18 15:41:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:19,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:19,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:19,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 15:41:19,940 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash -201923474, now seen corresponding path program 1 times [2022-01-18 15:41:19,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:19,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649198991] [2022-01-18 15:41:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:19,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:19,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649198991] [2022-01-18 15:41:19,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649198991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541442450] [2022-01-18 15:41:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:19,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:19,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:19,984 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) [2022-01-18 15:41:20,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 15:41:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:20,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:41:20,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:20,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:20,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541442450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:20,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:20,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 15:41:20,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293703588] [2022-01-18 15:41:20,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:20,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 15:41:20,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:20,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 15:41:20,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:41:20,257 INFO L87 Difference]: Start difference. First operand 604 states and 2161 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) [2022-01-18 15:41:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:20,352 INFO L93 Difference]: Finished difference Result 1057 states and 3653 transitions. [2022-01-18 15:41:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:41:20,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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 24 [2022-01-18 15:41:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:20,356 INFO L225 Difference]: With dead ends: 1057 [2022-01-18 15:41:20,356 INFO L226 Difference]: Without dead ends: 989 [2022-01-18 15:41:20,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:41:20,357 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 130 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:20,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 46 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-18 15:41:20,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 685. [2022-01-18 15:41:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6271929824561404) internal successors, (2481), 684 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2481 transitions. [2022-01-18 15:41:20,401 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2481 transitions. Word has length 24 [2022-01-18 15:41:20,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:20,401 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 2481 transitions. [2022-01-18 15:41:20,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) [2022-01-18 15:41:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2481 transitions. [2022-01-18 15:41:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:20,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:20,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:20,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:20,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-18 15:41:20,612 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 456470348, now seen corresponding path program 2 times [2022-01-18 15:41:20,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:20,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145344744] [2022-01-18 15:41:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:20,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:20,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:20,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145344744] [2022-01-18 15:41:20,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145344744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:41:20,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:41:20,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:41:20,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467858729] [2022-01-18 15:41:20,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:41:20,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:41:20,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:20,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:41:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:41:20,648 INFO L87 Difference]: Start difference. First operand 685 states and 2481 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:20,755 INFO L93 Difference]: Finished difference Result 990 states and 3448 transitions. [2022-01-18 15:41:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:41:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:41:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:20,760 INFO L225 Difference]: With dead ends: 990 [2022-01-18 15:41:20,760 INFO L226 Difference]: Without dead ends: 963 [2022-01-18 15:41:20,760 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 [2022-01-18 15:41:20,760 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:20,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 53 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-01-18 15:41:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 703. [2022-01-18 15:41:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.6210826210826212) internal successors, (2542), 702 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2542 transitions. [2022-01-18 15:41:20,777 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2542 transitions. Word has length 24 [2022-01-18 15:41:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:20,777 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2542 transitions. [2022-01-18 15:41:20,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2542 transitions. [2022-01-18 15:41:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:20,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:20,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:20,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 15:41:20,779 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash 633650655, now seen corresponding path program 3 times [2022-01-18 15:41:20,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:20,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278238074] [2022-01-18 15:41:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:20,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:20,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:20,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278238074] [2022-01-18 15:41:20,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278238074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123807234] [2022-01-18 15:41:20,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:20,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:20,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:20,816 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) [2022-01-18 15:41:20,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 15:41:20,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:41:20,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:20,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:41:20,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:20,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:20,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123807234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:20,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:20,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 15:41:20,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033803148] [2022-01-18 15:41:20,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:20,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 15:41:20,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:20,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 15:41:20,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:41:20,968 INFO L87 Difference]: Start difference. First operand 703 states and 2542 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2022-01-18 15:41:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:21,066 INFO L93 Difference]: Finished difference Result 1033 states and 3563 transitions. [2022-01-18 15:41:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:41:21,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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 24 [2022-01-18 15:41:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:21,071 INFO L225 Difference]: With dead ends: 1033 [2022-01-18 15:41:21,071 INFO L226 Difference]: Without dead ends: 949 [2022-01-18 15:41:21,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:41:21,071 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 110 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:21,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 49 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-18 15:41:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 628. [2022-01-18 15:41:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.5964912280701755) internal successors, (2255), 627 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2255 transitions. [2022-01-18 15:41:21,086 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2255 transitions. Word has length 24 [2022-01-18 15:41:21,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:21,086 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 2255 transitions. [2022-01-18 15:41:21,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2022-01-18 15:41:21,086 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2255 transitions. [2022-01-18 15:41:21,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:21,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:21,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:21,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:21,303 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,SelfDestructingSolverStorable7 [2022-01-18 15:41:21,304 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:21,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1487153047, now seen corresponding path program 4 times [2022-01-18 15:41:21,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:21,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228887591] [2022-01-18 15:41:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:21,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:21,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:21,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228887591] [2022-01-18 15:41:21,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228887591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:41:21,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:41:21,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:41:21,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277785613] [2022-01-18 15:41:21,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:41:21,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:41:21,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:21,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:41:21,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:41:21,324 INFO L87 Difference]: Start difference. First operand 628 states and 2255 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:21,434 INFO L93 Difference]: Finished difference Result 847 states and 3018 transitions. [2022-01-18 15:41:21,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:41:21,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:41:21,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:21,438 INFO L225 Difference]: With dead ends: 847 [2022-01-18 15:41:21,438 INFO L226 Difference]: Without dead ends: 827 [2022-01-18 15:41:21,438 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 [2022-01-18 15:41:21,438 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:21,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 65 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-01-18 15:41:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 620. [2022-01-18 15:41:21,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.61389337641357) internal successors, (2237), 619 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2237 transitions. [2022-01-18 15:41:21,451 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2237 transitions. Word has length 24 [2022-01-18 15:41:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:21,451 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 2237 transitions. [2022-01-18 15:41:21,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2237 transitions. [2022-01-18 15:41:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:21,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:21,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:21,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 15:41:21,453 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1597481612, now seen corresponding path program 3 times [2022-01-18 15:41:21,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:21,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016777018] [2022-01-18 15:41:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:21,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:21,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:21,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016777018] [2022-01-18 15:41:21,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016777018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:21,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457595] [2022-01-18 15:41:21,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:21,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:21,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:21,473 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) [2022-01-18 15:41:21,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 15:41:21,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:41:21,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:41:21,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:21,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:21,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:21,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:21,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 15:41:21,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758156046] [2022-01-18 15:41:21,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:21,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:41:21,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:41:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:41:21,592 INFO L87 Difference]: Start difference. First operand 620 states and 2237 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2022-01-18 15:41:21,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:21,701 INFO L93 Difference]: Finished difference Result 857 states and 3066 transitions. [2022-01-18 15:41:21,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:41:21,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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 24 [2022-01-18 15:41:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:21,705 INFO L225 Difference]: With dead ends: 857 [2022-01-18 15:41:21,705 INFO L226 Difference]: Without dead ends: 857 [2022-01-18 15:41:21,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:41:21,706 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:21,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 66 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-01-18 15:41:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 548. [2022-01-18 15:41:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.579524680073126) internal successors, (1958), 547 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:21,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1958 transitions. [2022-01-18 15:41:21,718 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1958 transitions. Word has length 24 [2022-01-18 15:41:21,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:21,718 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 1958 transitions. [2022-01-18 15:41:21,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2022-01-18 15:41:21,718 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1958 transitions. [2022-01-18 15:41:21,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:21,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:21,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:21,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:21,933 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 [2022-01-18 15:41:21,933 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:21,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1932653139, now seen corresponding path program 5 times [2022-01-18 15:41:21,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:21,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662351791] [2022-01-18 15:41:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:21,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:21,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:21,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662351791] [2022-01-18 15:41:21,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662351791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:41:21,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:41:21,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:41:21,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62675469] [2022-01-18 15:41:21,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:41:21,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:41:21,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:21,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:41:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:41:21,962 INFO L87 Difference]: Start difference. First operand 548 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:22,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:22,050 INFO L93 Difference]: Finished difference Result 866 states and 3014 transitions. [2022-01-18 15:41:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:41:22,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:41:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:22,054 INFO L225 Difference]: With dead ends: 866 [2022-01-18 15:41:22,054 INFO L226 Difference]: Without dead ends: 842 [2022-01-18 15:41:22,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:41:22,055 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 88 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:22,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 51 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-01-18 15:41:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 608. [2022-01-18 15:41:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.602965403624382) internal successors, (2187), 607 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2187 transitions. [2022-01-18 15:41:22,082 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2187 transitions. Word has length 24 [2022-01-18 15:41:22,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:22,082 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 2187 transitions. [2022-01-18 15:41:22,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:22,082 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2187 transitions. [2022-01-18 15:41:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:22,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:22,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:22,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 15:41:22,084 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:22,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash -189197302, now seen corresponding path program 4 times [2022-01-18 15:41:22,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:22,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189564771] [2022-01-18 15:41:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:22,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:22,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189564771] [2022-01-18 15:41:22,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189564771] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846936418] [2022-01-18 15:41:22,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:22,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:22,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:22,105 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) [2022-01-18 15:41:22,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 15:41:22,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:22,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:22,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:41:22,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:22,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:22,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846936418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:22,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:22,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 15:41:22,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778658242] [2022-01-18 15:41:22,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:22,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 15:41:22,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:22,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 15:41:22,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:41:22,270 INFO L87 Difference]: Start difference. First operand 608 states and 2187 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2022-01-18 15:41:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:22,393 INFO L93 Difference]: Finished difference Result 825 states and 2855 transitions. [2022-01-18 15:41:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:41:22,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 24 [2022-01-18 15:41:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:22,396 INFO L225 Difference]: With dead ends: 825 [2022-01-18 15:41:22,396 INFO L226 Difference]: Without dead ends: 757 [2022-01-18 15:41:22,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:41:22,397 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:22,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 56 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-18 15:41:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 603. [2022-01-18 15:41:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.5930232558139537) internal successors, (2163), 602 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2163 transitions. [2022-01-18 15:41:22,410 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2163 transitions. Word has length 24 [2022-01-18 15:41:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:22,410 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 2163 transitions. [2022-01-18 15:41:22,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2022-01-18 15:41:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2163 transitions. [2022-01-18 15:41:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:22,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:22,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:22,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:22,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:22,629 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:22,629 INFO L85 PathProgramCache]: Analyzing trace with hash 469196520, now seen corresponding path program 5 times [2022-01-18 15:41:22,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:22,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115795996] [2022-01-18 15:41:22,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:22,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:22,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:22,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115795996] [2022-01-18 15:41:22,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115795996] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:41:22,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:41:22,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:41:22,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348586348] [2022-01-18 15:41:22,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:41:22,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:41:22,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:41:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:41:22,648 INFO L87 Difference]: Start difference. First operand 603 states and 2163 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:22,785 INFO L93 Difference]: Finished difference Result 985 states and 3379 transitions. [2022-01-18 15:41:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:41:22,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:41:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:22,789 INFO L225 Difference]: With dead ends: 985 [2022-01-18 15:41:22,789 INFO L226 Difference]: Without dead ends: 946 [2022-01-18 15:41:22,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:41:22,790 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 109 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:22,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 76 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-01-18 15:41:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 591. [2022-01-18 15:41:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.6) internal successors, (2124), 590 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 2124 transitions. [2022-01-18 15:41:22,802 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 2124 transitions. Word has length 24 [2022-01-18 15:41:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:22,803 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 2124 transitions. [2022-01-18 15:41:22,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 2124 transitions. [2022-01-18 15:41:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:22,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:22,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:22,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-18 15:41:22,804 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash 646376827, now seen corresponding path program 6 times [2022-01-18 15:41:22,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:22,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034628765] [2022-01-18 15:41:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:22,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:22,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:22,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034628765] [2022-01-18 15:41:22,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034628765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:22,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258082254] [2022-01-18 15:41:22,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:41:22,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:22,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:22,836 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) [2022-01-18 15:41:22,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 15:41:22,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:41:22,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:22,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:41:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:22,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:22,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258082254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:22,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:22,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 15:41:22,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884198074] [2022-01-18 15:41:22,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:22,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 15:41:22,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:22,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 15:41:22,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:41:22,940 INFO L87 Difference]: Start difference. First operand 591 states and 2124 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2022-01-18 15:41:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:23,044 INFO L93 Difference]: Finished difference Result 783 states and 2748 transitions. [2022-01-18 15:41:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:41:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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 24 [2022-01-18 15:41:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:23,048 INFO L225 Difference]: With dead ends: 783 [2022-01-18 15:41:23,048 INFO L226 Difference]: Without dead ends: 783 [2022-01-18 15:41:23,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:41:23,048 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:23,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 60 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-01-18 15:41:23,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 582. [2022-01-18 15:41:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.604130808950086) internal successors, (2094), 581 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2094 transitions. [2022-01-18 15:41:23,059 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2094 transitions. Word has length 24 [2022-01-18 15:41:23,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:23,059 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 2094 transitions. [2022-01-18 15:41:23,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2022-01-18 15:41:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2094 transitions. [2022-01-18 15:41:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:23,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:23,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:23,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:23,276 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,SelfDestructingSolverStorable13 [2022-01-18 15:41:23,277 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:23,277 INFO L85 PathProgramCache]: Analyzing trace with hash -165524640, now seen corresponding path program 6 times [2022-01-18 15:41:23,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:23,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568550796] [2022-01-18 15:41:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:23,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:23,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:23,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568550796] [2022-01-18 15:41:23,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568550796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:41:23,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:41:23,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:41:23,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654334314] [2022-01-18 15:41:23,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:41:23,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:41:23,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:23,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:41:23,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:41:23,294 INFO L87 Difference]: Start difference. First operand 582 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:23,391 INFO L93 Difference]: Finished difference Result 597 states and 2122 transitions. [2022-01-18 15:41:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:41:23,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 15:41:23,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:23,393 INFO L225 Difference]: With dead ends: 597 [2022-01-18 15:41:23,393 INFO L226 Difference]: Without dead ends: 565 [2022-01-18 15:41:23,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:41:23,394 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:23,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 56 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-18 15:41:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2022-01-18 15:41:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.6382978723404253) internal successors, (2052), 564 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2052 transitions. [2022-01-18 15:41:23,404 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2052 transitions. Word has length 24 [2022-01-18 15:41:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:23,404 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 2052 transitions. [2022-01-18 15:41:23,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2052 transitions. [2022-01-18 15:41:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 15:41:23,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:23,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:23,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-18 15:41:23,405 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:23,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1904618539, now seen corresponding path program 7 times [2022-01-18 15:41:23,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:23,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599395970] [2022-01-18 15:41:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:23,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:23,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:23,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599395970] [2022-01-18 15:41:23,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599395970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:23,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178405646] [2022-01-18 15:41:23,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:41:23,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:23,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:23,432 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) [2022-01-18 15:41:23,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 15:41:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:23,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:41:23,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:23,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:23,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178405646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:23,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:23,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 15:41:23,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076820125] [2022-01-18 15:41:23,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:23,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:41:23,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:41:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:41:23,532 INFO L87 Difference]: Start difference. First operand 565 states and 2052 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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) [2022-01-18 15:41:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:23,616 INFO L93 Difference]: Finished difference Result 595 states and 2146 transitions. [2022-01-18 15:41:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:41:23,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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 24 [2022-01-18 15:41:23,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:23,618 INFO L225 Difference]: With dead ends: 595 [2022-01-18 15:41:23,618 INFO L226 Difference]: Without dead ends: 595 [2022-01-18 15:41:23,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:41:23,618 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:23,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 48 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:41:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-18 15:41:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 487. [2022-01-18 15:41:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.625514403292181) internal successors, (1762), 486 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1762 transitions. [2022-01-18 15:41:23,627 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1762 transitions. Word has length 24 [2022-01-18 15:41:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:23,627 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1762 transitions. [2022-01-18 15:41:23,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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) [2022-01-18 15:41:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1762 transitions. [2022-01-18 15:41:23,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:23,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:23,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:23,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:23,844 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,SelfDestructingSolverStorable15 [2022-01-18 15:41:23,845 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1226908174, now seen corresponding path program 1 times [2022-01-18 15:41:23,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:23,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782749339] [2022-01-18 15:41:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:23,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:23,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:23,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782749339] [2022-01-18 15:41:23,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782749339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:23,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918227855] [2022-01-18 15:41:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:23,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:23,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:23,967 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) [2022-01-18 15:41:23,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 15:41:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:24,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:24,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:24,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:24,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:24,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:24,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:41:24,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:41:24,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:24,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918227855] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:24,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:24,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 15:41:24,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488793771] [2022-01-18 15:41:24,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:24,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:41:24,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:24,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:41:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:41:24,425 INFO L87 Difference]: Start difference. First operand 487 states and 1762 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2022-01-18 15:41:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:24,760 INFO L93 Difference]: Finished difference Result 899 states and 3342 transitions. [2022-01-18 15:41:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:41:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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 26 [2022-01-18 15:41:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:24,763 INFO L225 Difference]: With dead ends: 899 [2022-01-18 15:41:24,763 INFO L226 Difference]: Without dead ends: 818 [2022-01-18 15:41:24,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:24,763 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:24,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 68 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 568 Invalid, 0 Unknown, 170 Unchecked, 0.3s Time] [2022-01-18 15:41:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-01-18 15:41:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 547. [2022-01-18 15:41:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 3.6336996336996337) internal successors, (1984), 546 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1984 transitions. [2022-01-18 15:41:24,775 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1984 transitions. Word has length 26 [2022-01-18 15:41:24,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:24,775 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 1984 transitions. [2022-01-18 15:41:24,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2022-01-18 15:41:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1984 transitions. [2022-01-18 15:41:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:24,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:24,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:24,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:24,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:24,993 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:24,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1338432237, now seen corresponding path program 1 times [2022-01-18 15:41:24,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:24,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466920732] [2022-01-18 15:41:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:24,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:25,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:25,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466920732] [2022-01-18 15:41:25,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466920732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:25,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680990230] [2022-01-18 15:41:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:25,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:25,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:25,119 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) [2022-01-18 15:41:25,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 15:41:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:25,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:25,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:25,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:25,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:25,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:25,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:25,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:41:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:41:25,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:41:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:25,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680990230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:25,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:25,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 15:41:25,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985719913] [2022-01-18 15:41:25,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:25,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:41:25,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:25,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:41:25,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:41:25,534 INFO L87 Difference]: Start difference. First operand 547 states and 1984 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2022-01-18 15:41:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:25,837 INFO L93 Difference]: Finished difference Result 975 states and 3622 transitions. [2022-01-18 15:41:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:41:25,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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 26 [2022-01-18 15:41:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:25,856 INFO L225 Difference]: With dead ends: 975 [2022-01-18 15:41:25,856 INFO L226 Difference]: Without dead ends: 924 [2022-01-18 15:41:25,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:25,856 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:25,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 82 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 576 Invalid, 0 Unknown, 316 Unchecked, 0.2s Time] [2022-01-18 15:41:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-18 15:41:25,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 572. [2022-01-18 15:41:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 3.640980735551664) internal successors, (2079), 571 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 2079 transitions. [2022-01-18 15:41:25,867 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 2079 transitions. Word has length 26 [2022-01-18 15:41:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:25,868 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 2079 transitions. [2022-01-18 15:41:25,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2022-01-18 15:41:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 2079 transitions. [2022-01-18 15:41:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:25,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:25,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:25,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-18 15:41:26,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 15:41:26,090 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash -833834161, now seen corresponding path program 2 times [2022-01-18 15:41:26,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:26,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849974037] [2022-01-18 15:41:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:26,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:26,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:26,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849974037] [2022-01-18 15:41:26,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849974037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:26,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086870103] [2022-01-18 15:41:26,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:26,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:26,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:26,186 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) [2022-01-18 15:41:26,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 15:41:26,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:26,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:26,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:26,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:26,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:26,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:41:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:26,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:26,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:26,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:41:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:27,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086870103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:27,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:27,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:41:27,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944115195] [2022-01-18 15:41:27,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:27,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:41:27,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:41:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:41:27,001 INFO L87 Difference]: Start difference. First operand 572 states and 2079 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:28,248 INFO L93 Difference]: Finished difference Result 2122 states and 7720 transitions. [2022-01-18 15:41:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:41:28,248 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:41:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:28,254 INFO L225 Difference]: With dead ends: 2122 [2022-01-18 15:41:28,254 INFO L226 Difference]: Without dead ends: 1864 [2022-01-18 15:41:28,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=303, Invalid=1337, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:41:28,255 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 385 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 953 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:28,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 166 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 993 Invalid, 0 Unknown, 953 Unchecked, 0.5s Time] [2022-01-18 15:41:28,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-01-18 15:41:28,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 671. [2022-01-18 15:41:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.698507462686567) internal successors, (2478), 670 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2478 transitions. [2022-01-18 15:41:28,272 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2478 transitions. Word has length 26 [2022-01-18 15:41:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:28,273 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 2478 transitions. [2022-01-18 15:41:28,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2478 transitions. [2022-01-18 15:41:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:28,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:28,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:28,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:28,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:28,491 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:28,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1804833811, now seen corresponding path program 3 times [2022-01-18 15:41:28,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:28,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494789571] [2022-01-18 15:41:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:28,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:28,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:28,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494789571] [2022-01-18 15:41:28,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494789571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:28,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078316555] [2022-01-18 15:41:28,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:28,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:28,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:28,583 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) [2022-01-18 15:41:28,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 15:41:28,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:41:28,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:28,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:28,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:28,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:28,786 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 16 treesize of output 18 [2022-01-18 15:41:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:28,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:29,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:29,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:29,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078316555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:29,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:29,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:41:29,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478441995] [2022-01-18 15:41:29,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:29,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:41:29,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:41:29,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:41:29,317 INFO L87 Difference]: Start difference. First operand 671 states and 2478 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:30,871 INFO L93 Difference]: Finished difference Result 2342 states and 8644 transitions. [2022-01-18 15:41:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:41:30,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:41:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:30,877 INFO L225 Difference]: With dead ends: 2342 [2022-01-18 15:41:30,877 INFO L226 Difference]: Without dead ends: 2066 [2022-01-18 15:41:30,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=389, Invalid=1681, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:41:30,878 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 311 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 626 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:30,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 153 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1187 Invalid, 0 Unknown, 626 Unchecked, 0.5s Time] [2022-01-18 15:41:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2022-01-18 15:41:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 716. [2022-01-18 15:41:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.7552447552447554) internal successors, (2685), 715 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2685 transitions. [2022-01-18 15:41:30,898 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2685 transitions. Word has length 26 [2022-01-18 15:41:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:30,898 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 2685 transitions. [2022-01-18 15:41:30,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2685 transitions. [2022-01-18 15:41:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:30,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:30,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:30,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-18 15:41:31,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:31,115 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:31,116 INFO L85 PathProgramCache]: Analyzing trace with hash -451524114, now seen corresponding path program 1 times [2022-01-18 15:41:31,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:31,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833552726] [2022-01-18 15:41:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:31,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:31,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:31,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833552726] [2022-01-18 15:41:31,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833552726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:31,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596011916] [2022-01-18 15:41:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:31,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:31,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:31,191 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) [2022-01-18 15:41:31,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 15:41:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:31,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:31,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:31,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:31,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:41:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:31,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:31,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:31,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:41:31,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:41:31,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:41:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:31,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596011916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:31,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:31,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:41:31,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126071307] [2022-01-18 15:41:31,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:31,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:41:31,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:41:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:41:31,533 INFO L87 Difference]: Start difference. First operand 716 states and 2685 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:31,878 INFO L93 Difference]: Finished difference Result 1178 states and 4447 transitions. [2022-01-18 15:41:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:41:31,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:41:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:31,882 INFO L225 Difference]: With dead ends: 1178 [2022-01-18 15:41:31,882 INFO L226 Difference]: Without dead ends: 1102 [2022-01-18 15:41:31,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:31,882 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:31,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 95 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 691 Invalid, 0 Unknown, 357 Unchecked, 0.3s Time] [2022-01-18 15:41:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-01-18 15:41:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 671. [2022-01-18 15:41:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.7313432835820897) internal successors, (2500), 670 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2500 transitions. [2022-01-18 15:41:31,895 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2500 transitions. Word has length 26 [2022-01-18 15:41:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:31,896 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 2500 transitions. [2022-01-18 15:41:31,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:31,896 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2500 transitions. [2022-01-18 15:41:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:31,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:31,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:31,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:32,112 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,SelfDestructingSolverStorable20 [2022-01-18 15:41:32,112 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:32,113 INFO L85 PathProgramCache]: Analyzing trace with hash -568580688, now seen corresponding path program 2 times [2022-01-18 15:41:32,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:32,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628773514] [2022-01-18 15:41:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:32,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:32,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:32,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628773514] [2022-01-18 15:41:32,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628773514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:32,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866567159] [2022-01-18 15:41:32,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:32,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:32,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:32,203 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) [2022-01-18 15:41:32,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 15:41:32,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:32,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:32,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:32,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:32,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:32,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:41:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:32,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:32,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:32,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:41:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:32,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866567159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:32,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:32,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:41:32,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82408626] [2022-01-18 15:41:32,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:32,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:41:32,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:32,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:41:32,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:41:32,888 INFO L87 Difference]: Start difference. First operand 671 states and 2500 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:34,536 INFO L93 Difference]: Finished difference Result 1687 states and 6316 transitions. [2022-01-18 15:41:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:41:34,536 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:41:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:34,540 INFO L225 Difference]: With dead ends: 1687 [2022-01-18 15:41:34,540 INFO L226 Difference]: Without dead ends: 1630 [2022-01-18 15:41:34,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:41:34,541 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 327 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:34,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 133 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1228 Invalid, 0 Unknown, 300 Unchecked, 0.5s Time] [2022-01-18 15:41:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2022-01-18 15:41:34,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 703. [2022-01-18 15:41:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.735042735042735) internal successors, (2622), 702 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2622 transitions. [2022-01-18 15:41:34,560 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2622 transitions. Word has length 26 [2022-01-18 15:41:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:34,560 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2622 transitions. [2022-01-18 15:41:34,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2622 transitions. [2022-01-18 15:41:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:34,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:34,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:34,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:34,778 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,SelfDestructingSolverStorable21 [2022-01-18 15:41:34,778 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:34,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1752012146, now seen corresponding path program 3 times [2022-01-18 15:41:34,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:34,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495314666] [2022-01-18 15:41:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:34,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:34,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:34,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495314666] [2022-01-18 15:41:34,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495314666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:34,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300058146] [2022-01-18 15:41:34,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:34,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:34,890 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) [2022-01-18 15:41:34,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 15:41:34,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:41:34,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:34,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:34,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:35,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:35,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:41:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:35,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:35,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:35,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:41:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:35,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300058146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:35,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:35,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:41:35,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581216086] [2022-01-18 15:41:35,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:35,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:41:35,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:41:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:41:35,688 INFO L87 Difference]: Start difference. First operand 703 states and 2622 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:37,307 INFO L93 Difference]: Finished difference Result 1738 states and 6437 transitions. [2022-01-18 15:41:37,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:41:37,307 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:41:37,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:37,311 INFO L225 Difference]: With dead ends: 1738 [2022-01-18 15:41:37,311 INFO L226 Difference]: Without dead ends: 1604 [2022-01-18 15:41:37,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:41:37,313 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 348 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:37,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 134 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1329 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-01-18 15:41:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2022-01-18 15:41:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 731. [2022-01-18 15:41:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.7739726027397262) internal successors, (2755), 730 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2755 transitions. [2022-01-18 15:41:37,327 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2755 transitions. Word has length 26 [2022-01-18 15:41:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:37,328 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 2755 transitions. [2022-01-18 15:41:37,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2755 transitions. [2022-01-18 15:41:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:37,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:37,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:37,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:37,544 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,SelfDestructingSolverStorable22 [2022-01-18 15:41:37,545 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash 224799535, now seen corresponding path program 4 times [2022-01-18 15:41:37,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:37,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394352711] [2022-01-18 15:41:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:37,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:37,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:37,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394352711] [2022-01-18 15:41:37,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394352711] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:37,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290653328] [2022-01-18 15:41:37,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:37,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:37,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:37,619 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) [2022-01-18 15:41:37,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 15:41:37,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:37,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:37,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:37,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:37,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:37,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:37,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:37,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:37,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:41:37,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:41:37,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:37,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290653328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:37,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:37,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:41:37,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140111819] [2022-01-18 15:41:37,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:37,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:41:37,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:41:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:41:37,979 INFO L87 Difference]: Start difference. First operand 731 states and 2755 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2022-01-18 15:41:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:38,218 INFO L93 Difference]: Finished difference Result 1183 states and 4481 transitions. [2022-01-18 15:41:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:41:38,219 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 26 [2022-01-18 15:41:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:38,221 INFO L225 Difference]: With dead ends: 1183 [2022-01-18 15:41:38,221 INFO L226 Difference]: Without dead ends: 1101 [2022-01-18 15:41:38,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:41:38,222 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:38,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 51 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 507 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-01-18 15:41:38,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-01-18 15:41:38,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 762. [2022-01-18 15:41:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.776609724047306) internal successors, (2874), 761 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2874 transitions. [2022-01-18 15:41:38,266 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2874 transitions. Word has length 26 [2022-01-18 15:41:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:38,266 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2874 transitions. [2022-01-18 15:41:38,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2022-01-18 15:41:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2874 transitions. [2022-01-18 15:41:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:38,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:38,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:38,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:38,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:38,482 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1705152987, now seen corresponding path program 5 times [2022-01-18 15:41:38,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:38,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148964068] [2022-01-18 15:41:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:38,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:38,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:38,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148964068] [2022-01-18 15:41:38,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148964068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:38,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047707783] [2022-01-18 15:41:38,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:41:38,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:38,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:38,564 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) [2022-01-18 15:41:38,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 15:41:38,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:38,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:38,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:38,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:38,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:41:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:38,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:38,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:38,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:41:38,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:41:38,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:41:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:38,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047707783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:38,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:38,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:41:38,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955008188] [2022-01-18 15:41:38,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:38,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:41:38,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:38,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:41:38,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:41:38,833 INFO L87 Difference]: Start difference. First operand 762 states and 2874 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:39,017 INFO L93 Difference]: Finished difference Result 1201 states and 4552 transitions. [2022-01-18 15:41:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:41:39,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:41:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:39,028 INFO L225 Difference]: With dead ends: 1201 [2022-01-18 15:41:39,028 INFO L226 Difference]: Without dead ends: 1119 [2022-01-18 15:41:39,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:41:39,029 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:39,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 65 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 609 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-01-18 15:41:39,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-01-18 15:41:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 761. [2022-01-18 15:41:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.7776315789473682) internal successors, (2871), 760 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2871 transitions. [2022-01-18 15:41:39,041 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2871 transitions. Word has length 26 [2022-01-18 15:41:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:39,042 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2871 transitions. [2022-01-18 15:41:39,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2871 transitions. [2022-01-18 15:41:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:39,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:39,043 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:39,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:39,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:39,259 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:39,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1242967396, now seen corresponding path program 4 times [2022-01-18 15:41:39,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:39,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122861381] [2022-01-18 15:41:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:39,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:39,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:39,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122861381] [2022-01-18 15:41:39,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122861381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:39,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029026663] [2022-01-18 15:41:39,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:39,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:39,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:39,357 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) [2022-01-18 15:41:39,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 15:41:39,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:39,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:39,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:39,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:39,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:39,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:39,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:39,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:41:39,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:41:39,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:39,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029026663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:39,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:39,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:41:39,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773795607] [2022-01-18 15:41:39,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:39,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:41:39,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:39,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:41:39,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:41:39,639 INFO L87 Difference]: Start difference. First operand 761 states and 2871 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2022-01-18 15:41:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:39,857 INFO L93 Difference]: Finished difference Result 1147 states and 4334 transitions. [2022-01-18 15:41:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:41:39,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 26 [2022-01-18 15:41:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:39,859 INFO L225 Difference]: With dead ends: 1147 [2022-01-18 15:41:39,859 INFO L226 Difference]: Without dead ends: 1080 [2022-01-18 15:41:39,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:41:39,860 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:39,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 61 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 629 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-01-18 15:41:39,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-01-18 15:41:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 746. [2022-01-18 15:41:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.7731543624161072) internal successors, (2811), 745 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2811 transitions. [2022-01-18 15:41:39,873 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2811 transitions. Word has length 26 [2022-01-18 15:41:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:39,873 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2811 transitions. [2022-01-18 15:41:39,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2022-01-18 15:41:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2811 transitions. [2022-01-18 15:41:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:39,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:39,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:39,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:40,091 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,SelfDestructingSolverStorable25 [2022-01-18 15:41:40,091 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:40,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1083669434, now seen corresponding path program 5 times [2022-01-18 15:41:40,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:40,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577027650] [2022-01-18 15:41:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:40,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:40,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:40,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577027650] [2022-01-18 15:41:40,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577027650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:40,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998428447] [2022-01-18 15:41:40,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:41:40,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:40,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:40,172 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) [2022-01-18 15:41:40,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 15:41:40,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:41:40,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:40,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:40,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:40,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:40,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:41:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:40,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:40,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:40,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:41:40,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:41:40,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:41:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:40,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998428447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:40,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:40,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:41:40,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215308001] [2022-01-18 15:41:40,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:40,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:41:40,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:40,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:41:40,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:41:40,493 INFO L87 Difference]: Start difference. First operand 746 states and 2811 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) [2022-01-18 15:41:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:40,777 INFO L93 Difference]: Finished difference Result 1149 states and 4350 transitions. [2022-01-18 15:41:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:41:40,777 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 26 [2022-01-18 15:41:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:40,779 INFO L225 Difference]: With dead ends: 1149 [2022-01-18 15:41:40,779 INFO L226 Difference]: Without dead ends: 1070 [2022-01-18 15:41:40,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:41:40,780 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:40,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 60 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 632 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-01-18 15:41:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-01-18 15:41:40,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 728. [2022-01-18 15:41:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 3.7427785419532325) internal successors, (2721), 727 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2721 transitions. [2022-01-18 15:41:40,804 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2721 transitions. Word has length 26 [2022-01-18 15:41:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:40,804 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 2721 transitions. [2022-01-18 15:41:40,804 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) [2022-01-18 15:41:40,804 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2721 transitions. [2022-01-18 15:41:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:40,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:40,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:40,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-18 15:41:41,059 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,SelfDestructingSolverStorable26 [2022-01-18 15:41:41,059 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 194382122, now seen corresponding path program 1 times [2022-01-18 15:41:41,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:41,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706886531] [2022-01-18 15:41:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:41,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:41,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706886531] [2022-01-18 15:41:41,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706886531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:41,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246551760] [2022-01-18 15:41:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:41,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:41,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:41,157 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) [2022-01-18 15:41:41,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 15:41:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:41,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:41,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:41,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:41,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:41,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:41,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:41,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:41:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:41:41,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:41:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:41,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246551760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:41,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:41,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:41:41,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016639719] [2022-01-18 15:41:41,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:41,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:41:41,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:41,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:41:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:41:41,596 INFO L87 Difference]: Start difference. First operand 728 states and 2721 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:41,895 INFO L93 Difference]: Finished difference Result 1017 states and 3824 transitions. [2022-01-18 15:41:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:41:41,895 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:41:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:41,897 INFO L225 Difference]: With dead ends: 1017 [2022-01-18 15:41:41,897 INFO L226 Difference]: Without dead ends: 1014 [2022-01-18 15:41:41,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:41:41,897 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:41,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 75 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 650 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-01-18 15:41:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-01-18 15:41:41,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 775. [2022-01-18 15:41:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7583979328165373) internal successors, (2909), 774 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2909 transitions. [2022-01-18 15:41:41,915 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2909 transitions. Word has length 26 [2022-01-18 15:41:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:41,916 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2909 transitions. [2022-01-18 15:41:41,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:41,916 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2909 transitions. [2022-01-18 15:41:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:41,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:41,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:41,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:42,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 15:41:42,133 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash 195305643, now seen corresponding path program 1 times [2022-01-18 15:41:42,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:42,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040364559] [2022-01-18 15:41:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:42,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:42,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:42,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040364559] [2022-01-18 15:41:42,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040364559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:42,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035303554] [2022-01-18 15:41:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:42,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:42,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:42,240 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) [2022-01-18 15:41:42,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 15:41:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:42,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:42,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:42,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:42,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:42,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:42,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:42,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:41:42,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:42,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035303554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:42,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:42,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:41:42,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128958633] [2022-01-18 15:41:42,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:42,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:41:42,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:42,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:41:42,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:41:42,685 INFO L87 Difference]: Start difference. First operand 775 states and 2909 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:43,095 INFO L93 Difference]: Finished difference Result 1118 states and 4228 transitions. [2022-01-18 15:41:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:41:43,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:41:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:43,097 INFO L225 Difference]: With dead ends: 1118 [2022-01-18 15:41:43,097 INFO L226 Difference]: Without dead ends: 1043 [2022-01-18 15:41:43,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:43,098 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:43,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 76 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 890 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-01-18 15:41:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-01-18 15:41:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 755. [2022-01-18 15:41:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.7519893899204244) internal successors, (2829), 754 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2829 transitions. [2022-01-18 15:41:43,115 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2829 transitions. Word has length 26 [2022-01-18 15:41:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:43,115 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2829 transitions. [2022-01-18 15:41:43,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2829 transitions. [2022-01-18 15:41:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:43,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:43,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:43,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:43,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 15:41:43,334 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:43,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:43,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2101425572, now seen corresponding path program 2 times [2022-01-18 15:41:43,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:43,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954524764] [2022-01-18 15:41:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:43,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:43,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954524764] [2022-01-18 15:41:43,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954524764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882487440] [2022-01-18 15:41:43,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:43,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:43,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:43,462 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) [2022-01-18 15:41:43,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 15:41:43,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:43,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:43,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:41:43,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:43,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:43,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:43,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:43,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:43,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:41:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:43,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882487440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:43,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:43,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:41:43,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899872645] [2022-01-18 15:41:43,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:43,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:43,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:43,886 INFO L87 Difference]: Start difference. First operand 755 states and 2829 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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) [2022-01-18 15:41:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:45,056 INFO L93 Difference]: Finished difference Result 1427 states and 5420 transitions. [2022-01-18 15:41:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:41:45,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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 26 [2022-01-18 15:41:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:45,059 INFO L225 Difference]: With dead ends: 1427 [2022-01-18 15:41:45,059 INFO L226 Difference]: Without dead ends: 1352 [2022-01-18 15:41:45,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:41:45,060 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 426 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:45,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 80 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:41:45,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-01-18 15:41:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 751. [2022-01-18 15:41:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.7506666666666666) internal successors, (2813), 750 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2813 transitions. [2022-01-18 15:41:45,073 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2813 transitions. Word has length 26 [2022-01-18 15:41:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:45,073 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2813 transitions. [2022-01-18 15:41:45,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 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) [2022-01-18 15:41:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2813 transitions. [2022-01-18 15:41:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:45,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:45,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:45,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:45,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:45,291 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:45,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1304045621, now seen corresponding path program 1 times [2022-01-18 15:41:45,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:45,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920840057] [2022-01-18 15:41:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:45,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:45,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:45,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920840057] [2022-01-18 15:41:45,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920840057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:45,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070705374] [2022-01-18 15:41:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:45,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:45,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:45,399 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) [2022-01-18 15:41:45,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 15:41:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:45,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:45,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:45,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:41:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:45,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:45,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:45,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:45,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:41:45,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:45,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070705374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:45,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:45,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:41:45,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528858461] [2022-01-18 15:41:45,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:45,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:41:45,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:45,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:41:45,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:41:45,767 INFO L87 Difference]: Start difference. First operand 751 states and 2813 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-01-18 15:41:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:46,205 INFO L93 Difference]: Finished difference Result 1258 states and 4804 transitions. [2022-01-18 15:41:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:41:46,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 26 [2022-01-18 15:41:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:46,207 INFO L225 Difference]: With dead ends: 1258 [2022-01-18 15:41:46,207 INFO L226 Difference]: Without dead ends: 1158 [2022-01-18 15:41:46,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:41:46,208 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 192 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:46,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 66 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 829 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2022-01-18 15:41:46,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-01-18 15:41:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 771. [2022-01-18 15:41:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.787012987012987) internal successors, (2916), 770 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:46,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2916 transitions. [2022-01-18 15:41:46,220 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2916 transitions. Word has length 26 [2022-01-18 15:41:46,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:46,221 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 2916 transitions. [2022-01-18 15:41:46,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-01-18 15:41:46,221 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2916 transitions. [2022-01-18 15:41:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:46,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:46,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:46,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-18 15:41:46,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:46,423 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:46,423 INFO L85 PathProgramCache]: Analyzing trace with hash -895717173, now seen corresponding path program 2 times [2022-01-18 15:41:46,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:46,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273390048] [2022-01-18 15:41:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:46,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:46,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:46,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273390048] [2022-01-18 15:41:46,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273390048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:46,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140241775] [2022-01-18 15:41:46,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:46,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:46,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:46,507 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) [2022-01-18 15:41:46,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 15:41:46,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:46,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:46,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:41:46,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:46,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:46,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:46,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:47,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:47,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-01-18 15:41:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:47,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140241775] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:47,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:47,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 15:41:47,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933276803] [2022-01-18 15:41:47,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:47,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:41:47,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:47,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:41:47,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:41:47,294 INFO L87 Difference]: Start difference. First operand 771 states and 2916 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:52,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:52,138 INFO L93 Difference]: Finished difference Result 5151 states and 18340 transitions. [2022-01-18 15:41:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 15:41:52,138 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:41:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:52,149 INFO L225 Difference]: With dead ends: 5151 [2022-01-18 15:41:52,149 INFO L226 Difference]: Without dead ends: 4243 [2022-01-18 15:41:52,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3264 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1731, Invalid=7389, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 15:41:52,151 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1103 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 4194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 798 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:52,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 312 Invalid, 4194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2991 Invalid, 0 Unknown, 798 Unchecked, 1.4s Time] [2022-01-18 15:41:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2022-01-18 15:41:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 1015. [2022-01-18 15:41:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.888560157790927) internal successors, (3943), 1014 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3943 transitions. [2022-01-18 15:41:52,183 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3943 transitions. Word has length 26 [2022-01-18 15:41:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:52,183 INFO L470 AbstractCegarLoop]: Abstraction has 1015 states and 3943 transitions. [2022-01-18 15:41:52,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3943 transitions. [2022-01-18 15:41:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:52,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:52,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:52,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:52,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:52,401 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:52,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1739868142, now seen corresponding path program 3 times [2022-01-18 15:41:52,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:52,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374148040] [2022-01-18 15:41:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:52,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:52,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:52,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374148040] [2022-01-18 15:41:52,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374148040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:52,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717845493] [2022-01-18 15:41:52,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:52,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:52,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:52,492 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) [2022-01-18 15:41:52,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 15:41:52,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:41:52,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:52,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:41:52,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:52,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:52,654 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 11 treesize of output 15 [2022-01-18 15:41:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:52,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:53,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:53,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:53,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717845493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:53,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:53,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 15:41:53,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414798386] [2022-01-18 15:41:53,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:53,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:41:53,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:53,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:41:53,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:41:53,146 INFO L87 Difference]: Start difference. First operand 1015 states and 3943 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:56,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:56,547 INFO L93 Difference]: Finished difference Result 3237 states and 11702 transitions. [2022-01-18 15:41:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 15:41:56,547 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:41:56,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:56,553 INFO L225 Difference]: With dead ends: 3237 [2022-01-18 15:41:56,553 INFO L226 Difference]: Without dead ends: 2886 [2022-01-18 15:41:56,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1184, Invalid=4978, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 15:41:56,554 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 999 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 3343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:56,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 249 Invalid, 3343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 2389 Invalid, 0 Unknown, 659 Unchecked, 1.1s Time] [2022-01-18 15:41:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2022-01-18 15:41:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 1078. [2022-01-18 15:41:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 3.89322191272052) internal successors, (4193), 1077 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 4193 transitions. [2022-01-18 15:41:56,576 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 4193 transitions. Word has length 26 [2022-01-18 15:41:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:56,576 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 4193 transitions. [2022-01-18 15:41:56,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 4193 transitions. [2022-01-18 15:41:56,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:56,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:56,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:56,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:56,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:56,793 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:56,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:56,793 INFO L85 PathProgramCache]: Analyzing trace with hash 163427787, now seen corresponding path program 3 times [2022-01-18 15:41:56,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:56,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191581946] [2022-01-18 15:41:56,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:56,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:56,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191581946] [2022-01-18 15:41:56,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191581946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862870502] [2022-01-18 15:41:56,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:56,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:56,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:56,882 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) [2022-01-18 15:41:56,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 15:41:56,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:41:56,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:56,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:41:56,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:57,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:57,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:41:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:57,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:57,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:57,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:57,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862870502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:57,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:57,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 15:41:57,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573051327] [2022-01-18 15:41:57,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:57,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:41:57,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:57,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:41:57,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:41:57,568 INFO L87 Difference]: Start difference. First operand 1078 states and 4193 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:59,064 INFO L93 Difference]: Finished difference Result 2573 states and 9605 transitions. [2022-01-18 15:41:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 15:41:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:41:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:59,071 INFO L225 Difference]: With dead ends: 2573 [2022-01-18 15:41:59,071 INFO L226 Difference]: Without dead ends: 2367 [2022-01-18 15:41:59,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=620, Invalid=2920, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 15:41:59,072 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 565 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1094 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:59,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 174 Invalid, 3210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1960 Invalid, 0 Unknown, 1094 Unchecked, 0.6s Time] [2022-01-18 15:41:59,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2022-01-18 15:41:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1104. [2022-01-18 15:41:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.8812330009066183) internal successors, (4281), 1103 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4281 transitions. [2022-01-18 15:41:59,111 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4281 transitions. Word has length 26 [2022-01-18 15:41:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:59,111 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 4281 transitions. [2022-01-18 15:41:59,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4281 transitions. [2022-01-18 15:41:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:41:59,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:59,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:59,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 15:41:59,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:59,321 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:41:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:59,322 INFO L85 PathProgramCache]: Analyzing trace with hash -129975220, now seen corresponding path program 1 times [2022-01-18 15:41:59,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:59,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456810914] [2022-01-18 15:41:59,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:59,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:59,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456810914] [2022-01-18 15:41:59,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456810914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:59,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797462376] [2022-01-18 15:41:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:59,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:59,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:59,422 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) [2022-01-18 15:41:59,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 15:41:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:59,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:59,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:59,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:59,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:59,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:59,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:41:59,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:41:59,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:41:59,764 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:41:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:59,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797462376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:59,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:59,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 15:41:59,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689096956] [2022-01-18 15:41:59,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:59,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:41:59,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:59,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:41:59,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:41:59,786 INFO L87 Difference]: Start difference. First operand 1104 states and 4281 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2022-01-18 15:42:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:00,005 INFO L93 Difference]: Finished difference Result 1445 states and 5542 transitions. [2022-01-18 15:42:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:42:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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 26 [2022-01-18 15:42:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:00,008 INFO L225 Difference]: With dead ends: 1445 [2022-01-18 15:42:00,008 INFO L226 Difference]: Without dead ends: 1424 [2022-01-18 15:42:00,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:00,008 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:00,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 59 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 624 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-01-18 15:42:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-01-18 15:42:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1083. [2022-01-18 15:42:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 3.8964879852125693) internal successors, (4216), 1082 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 4216 transitions. [2022-01-18 15:42:00,037 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 4216 transitions. Word has length 26 [2022-01-18 15:42:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:00,037 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 4216 transitions. [2022-01-18 15:42:00,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2022-01-18 15:42:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 4216 transitions. [2022-01-18 15:42:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:00,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:00,045 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:00,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 15:42:00,261 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,SelfDestructingSolverStorable34 [2022-01-18 15:42:00,261 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:00,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:00,261 INFO L85 PathProgramCache]: Analyzing trace with hash 237772382, now seen corresponding path program 6 times [2022-01-18 15:42:00,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:00,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100760339] [2022-01-18 15:42:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:00,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:00,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:00,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100760339] [2022-01-18 15:42:00,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100760339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:00,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473104546] [2022-01-18 15:42:00,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:00,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:00,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:00,343 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) [2022-01-18 15:42:00,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 15:42:00,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:42:00,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:00,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:00,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:00,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:42:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:00,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:00,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:00,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:00,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473104546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:00,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:00,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 15:42:00,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286934487] [2022-01-18 15:42:00,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:00,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:42:00,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:42:00,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:42:00,679 INFO L87 Difference]: Start difference. First operand 1083 states and 4216 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) [2022-01-18 15:42:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:01,488 INFO L93 Difference]: Finished difference Result 1971 states and 7502 transitions. [2022-01-18 15:42:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:42:01,489 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 26 [2022-01-18 15:42:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:01,492 INFO L225 Difference]: With dead ends: 1971 [2022-01-18 15:42:01,492 INFO L226 Difference]: Without dead ends: 1760 [2022-01-18 15:42:01,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:42:01,493 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 484 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:01,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 90 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1020 Invalid, 0 Unknown, 341 Unchecked, 0.4s Time] [2022-01-18 15:42:01,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-01-18 15:42:01,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1122. [2022-01-18 15:42:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.8858162355040142) internal successors, (4356), 1121 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 4356 transitions. [2022-01-18 15:42:01,511 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 4356 transitions. Word has length 26 [2022-01-18 15:42:01,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:01,512 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 4356 transitions. [2022-01-18 15:42:01,512 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) [2022-01-18 15:42:01,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 4356 transitions. [2022-01-18 15:42:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:01,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:01,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:01,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:01,729 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,SelfDestructingSolverStorable35 [2022-01-18 15:42:01,729 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:01,729 INFO L85 PathProgramCache]: Analyzing trace with hash 422766040, now seen corresponding path program 4 times [2022-01-18 15:42:01,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:01,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829035429] [2022-01-18 15:42:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:01,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:01,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829035429] [2022-01-18 15:42:01,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829035429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932784238] [2022-01-18 15:42:01,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:01,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:01,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:01,815 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) [2022-01-18 15:42:01,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 15:42:01,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:01,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:01,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:01,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:01,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 15:42:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:02,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:02,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:02,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:02,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:02,149 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:42:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:02,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932784238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:02,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:02,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 15:42:02,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617999075] [2022-01-18 15:42:02,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:02,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:42:02,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:02,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:42:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:42:02,192 INFO L87 Difference]: Start difference. First operand 1122 states and 4356 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:02,527 INFO L93 Difference]: Finished difference Result 1473 states and 5695 transitions. [2022-01-18 15:42:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:42:02,527 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:02,529 INFO L225 Difference]: With dead ends: 1473 [2022-01-18 15:42:02,530 INFO L226 Difference]: Without dead ends: 1400 [2022-01-18 15:42:02,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:02,530 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:02,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 68 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:42:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-01-18 15:42:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1122. [2022-01-18 15:42:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.8858162355040142) internal successors, (4356), 1121 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 4356 transitions. [2022-01-18 15:42:02,546 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 4356 transitions. Word has length 26 [2022-01-18 15:42:02,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:02,546 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 4356 transitions. [2022-01-18 15:42:02,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:02,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 4356 transitions. [2022-01-18 15:42:02,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:02,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:02,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:02,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:02,750 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,SelfDestructingSolverStorable36 [2022-01-18 15:42:02,750 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:02,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1280716796, now seen corresponding path program 7 times [2022-01-18 15:42:02,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:02,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582511386] [2022-01-18 15:42:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:02,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:02,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:02,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582511386] [2022-01-18 15:42:02,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582511386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:02,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638060554] [2022-01-18 15:42:02,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:02,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:02,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:02,848 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) [2022-01-18 15:42:02,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 15:42:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:02,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:02,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:02,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:42:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:03,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:03,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:03,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:42:03,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:03,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:03,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638060554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:03,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:03,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:42:03,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002886766] [2022-01-18 15:42:03,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:03,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:42:03,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:03,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:42:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:42:03,155 INFO L87 Difference]: Start difference. First operand 1122 states and 4356 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2022-01-18 15:42:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:03,478 INFO L93 Difference]: Finished difference Result 1505 states and 5807 transitions. [2022-01-18 15:42:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:42:03,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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 26 [2022-01-18 15:42:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:03,486 INFO L225 Difference]: With dead ends: 1505 [2022-01-18 15:42:03,486 INFO L226 Difference]: Without dead ends: 1432 [2022-01-18 15:42:03,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:03,486 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:03,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 73 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:42:03,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2022-01-18 15:42:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1129. [2022-01-18 15:42:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 3.8847517730496453) internal successors, (4382), 1128 states have internal predecessors, (4382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 4382 transitions. [2022-01-18 15:42:03,504 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 4382 transitions. Word has length 26 [2022-01-18 15:42:03,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:03,504 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 4382 transitions. [2022-01-18 15:42:03,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2022-01-18 15:42:03,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 4382 transitions. [2022-01-18 15:42:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:03,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:03,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:03,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:03,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:03,719 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1045920034, now seen corresponding path program 8 times [2022-01-18 15:42:03,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:03,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696431634] [2022-01-18 15:42:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:03,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:03,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:03,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696431634] [2022-01-18 15:42:03,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696431634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:03,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397691339] [2022-01-18 15:42:03,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:03,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:03,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:03,787 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) [2022-01-18 15:42:03,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 15:42:03,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:03,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:03,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:03,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:03,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:03,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:03,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:04,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:04,126 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 28 treesize of output 27 [2022-01-18 15:42:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:04,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397691339] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:04,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:04,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 15:42:04,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130518388] [2022-01-18 15:42:04,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:04,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:42:04,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:42:04,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:42:04,224 INFO L87 Difference]: Start difference. First operand 1129 states and 4382 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) [2022-01-18 15:42:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:05,476 INFO L93 Difference]: Finished difference Result 2053 states and 7840 transitions. [2022-01-18 15:42:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:42:05,476 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 26 [2022-01-18 15:42:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:05,480 INFO L225 Difference]: With dead ends: 2053 [2022-01-18 15:42:05,480 INFO L226 Difference]: Without dead ends: 1863 [2022-01-18 15:42:05,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=492, Invalid=1860, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:42:05,481 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 420 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:05,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 119 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1553 Invalid, 0 Unknown, 407 Unchecked, 0.5s Time] [2022-01-18 15:42:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2022-01-18 15:42:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1137. [2022-01-18 15:42:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.8882042253521125) internal successors, (4417), 1136 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 4417 transitions. [2022-01-18 15:42:05,499 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 4417 transitions. Word has length 26 [2022-01-18 15:42:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:05,499 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 4417 transitions. [2022-01-18 15:42:05,500 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) [2022-01-18 15:42:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 4417 transitions. [2022-01-18 15:42:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:05,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:05,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:05,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 15:42:05,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 15:42:05,705 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1134269976, now seen corresponding path program 5 times [2022-01-18 15:42:05,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:05,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902373424] [2022-01-18 15:42:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:05,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:05,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:05,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902373424] [2022-01-18 15:42:05,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902373424] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:05,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973642575] [2022-01-18 15:42:05,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:05,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:05,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:05,818 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) [2022-01-18 15:42:05,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 15:42:05,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:05,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:05,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:05,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:05,931 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:42:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:05,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:06,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:06,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:42:06,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:06,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:06,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973642575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:06,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:06,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:42:06,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624379675] [2022-01-18 15:42:06,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:06,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:42:06,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:06,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:42:06,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:42:06,080 INFO L87 Difference]: Start difference. First operand 1137 states and 4417 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:06,329 INFO L93 Difference]: Finished difference Result 1474 states and 5704 transitions. [2022-01-18 15:42:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:42:06,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:06,332 INFO L225 Difference]: With dead ends: 1474 [2022-01-18 15:42:06,332 INFO L226 Difference]: Without dead ends: 1401 [2022-01-18 15:42:06,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:06,332 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:06,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 67 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-01-18 15:42:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1146. [2022-01-18 15:42:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.890829694323144) internal successors, (4455), 1145 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 4455 transitions. [2022-01-18 15:42:06,351 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 4455 transitions. Word has length 26 [2022-01-18 15:42:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:06,353 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 4455 transitions. [2022-01-18 15:42:06,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 4455 transitions. [2022-01-18 15:42:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:06,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:06,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:06,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:06,559 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,SelfDestructingSolverStorable39 [2022-01-18 15:42:06,559 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash -385639184, now seen corresponding path program 6 times [2022-01-18 15:42:06,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:06,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251488334] [2022-01-18 15:42:06,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:06,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:06,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251488334] [2022-01-18 15:42:06,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251488334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839612198] [2022-01-18 15:42:06,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:06,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:06,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:06,630 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) [2022-01-18 15:42:06,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 15:42:06,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:42:06,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:06,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:06,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:06,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:06,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:06,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:06,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:06,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:07,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839612198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:07,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:07,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 15:42:07,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616020985] [2022-01-18 15:42:07,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:07,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:42:07,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:07,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:42:07,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:42:07,050 INFO L87 Difference]: Start difference. First operand 1146 states and 4455 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:08,090 INFO L93 Difference]: Finished difference Result 1988 states and 7612 transitions. [2022-01-18 15:42:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 15:42:08,091 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:08,094 INFO L225 Difference]: With dead ends: 1988 [2022-01-18 15:42:08,094 INFO L226 Difference]: Without dead ends: 1808 [2022-01-18 15:42:08,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=470, Invalid=1786, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:42:08,095 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 446 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:08,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 106 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1442 Invalid, 0 Unknown, 266 Unchecked, 0.4s Time] [2022-01-18 15:42:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2022-01-18 15:42:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1148. [2022-01-18 15:42:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.891020052310375) internal successors, (4463), 1147 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 4463 transitions. [2022-01-18 15:42:08,120 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 4463 transitions. Word has length 26 [2022-01-18 15:42:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:08,120 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 4463 transitions. [2022-01-18 15:42:08,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:08,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 4463 transitions. [2022-01-18 15:42:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:08,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:08,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:08,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 15:42:08,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:08,336 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:08,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:08,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1828012003, now seen corresponding path program 6 times [2022-01-18 15:42:08,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:08,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600607316] [2022-01-18 15:42:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:08,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:08,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:08,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600607316] [2022-01-18 15:42:08,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600607316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:08,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607732328] [2022-01-18 15:42:08,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:08,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:08,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:08,448 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) [2022-01-18 15:42:08,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 15:42:08,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:42:08,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:08,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:08,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:08,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:08,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:08,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:08,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:08,970 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:42:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:09,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607732328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:09,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:09,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:42:09,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363321259] [2022-01-18 15:42:09,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:09,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:09,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:09,064 INFO L87 Difference]: Start difference. First operand 1148 states and 4463 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:10,651 INFO L93 Difference]: Finished difference Result 3662 states and 13707 transitions. [2022-01-18 15:42:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:42:10,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:10,682 INFO L225 Difference]: With dead ends: 3662 [2022-01-18 15:42:10,683 INFO L226 Difference]: Without dead ends: 3453 [2022-01-18 15:42:10,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=454, Invalid=2096, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:42:10,684 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 505 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:10,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 191 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1981 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:42:10,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2022-01-18 15:42:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 1208. [2022-01-18 15:42:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 3.899751449875725) internal successors, (4707), 1207 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 4707 transitions. [2022-01-18 15:42:10,707 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 4707 transitions. Word has length 26 [2022-01-18 15:42:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:10,707 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 4707 transitions. [2022-01-18 15:42:10,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:10,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 4707 transitions. [2022-01-18 15:42:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:10,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:10,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:10,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:10,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:10,919 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1643018345, now seen corresponding path program 4 times [2022-01-18 15:42:10,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:10,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984611754] [2022-01-18 15:42:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:10,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:11,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:11,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984611754] [2022-01-18 15:42:11,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984611754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:11,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494923319] [2022-01-18 15:42:11,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:11,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:11,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:11,005 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) [2022-01-18 15:42:11,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 15:42:11,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:11,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:11,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:11,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:11,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:11,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:42:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:11,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:11,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:11,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:11,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:11,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:11,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494923319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:11,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:11,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 15:42:11,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780494268] [2022-01-18 15:42:11,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:11,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:42:11,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:11,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:42:11,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:42:11,285 INFO L87 Difference]: Start difference. First operand 1208 states and 4707 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:11,598 INFO L93 Difference]: Finished difference Result 1603 states and 6218 transitions. [2022-01-18 15:42:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:42:11,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:11,601 INFO L225 Difference]: With dead ends: 1603 [2022-01-18 15:42:11,601 INFO L226 Difference]: Without dead ends: 1521 [2022-01-18 15:42:11,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:11,603 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:11,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 82 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:42:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2022-01-18 15:42:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1185. [2022-01-18 15:42:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 3.918918918918919) internal successors, (4640), 1184 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 4640 transitions. [2022-01-18 15:42:11,619 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 4640 transitions. Word has length 26 [2022-01-18 15:42:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:11,621 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 4640 transitions. [2022-01-18 15:42:11,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:11,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 4640 transitions. [2022-01-18 15:42:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:11,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:11,623 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:11,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:11,838 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,SelfDestructingSolverStorable42 [2022-01-18 15:42:11,838 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:11,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1175566379, now seen corresponding path program 7 times [2022-01-18 15:42:11,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:11,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513507464] [2022-01-18 15:42:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:11,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:11,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:11,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513507464] [2022-01-18 15:42:11,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513507464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:11,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082953742] [2022-01-18 15:42:11,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:11,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:11,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:11,946 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) [2022-01-18 15:42:11,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 15:42:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:11,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:12,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:12,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:42:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:12,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:12,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:12,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:42:12,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:12,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:42:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:12,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082953742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:12,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:12,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:42:12,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141674164] [2022-01-18 15:42:12,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:12,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:42:12,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:12,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:42:12,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:42:12,205 INFO L87 Difference]: Start difference. First operand 1185 states and 4640 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) [2022-01-18 15:42:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:12,465 INFO L93 Difference]: Finished difference Result 1626 states and 6315 transitions. [2022-01-18 15:42:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:42:12,465 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 26 [2022-01-18 15:42:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:12,468 INFO L225 Difference]: With dead ends: 1626 [2022-01-18 15:42:12,468 INFO L226 Difference]: Without dead ends: 1544 [2022-01-18 15:42:12,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:12,469 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:12,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 73 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-01-18 15:42:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1188. [2022-01-18 15:42:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.91575400168492) internal successors, (4648), 1187 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 4648 transitions. [2022-01-18 15:42:12,485 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 4648 transitions. Word has length 26 [2022-01-18 15:42:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:12,485 INFO L470 AbstractCegarLoop]: Abstraction has 1188 states and 4648 transitions. [2022-01-18 15:42:12,485 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) [2022-01-18 15:42:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 4648 transitions. [2022-01-18 15:42:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:12,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:12,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:12,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:12,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:12,694 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash -436912189, now seen corresponding path program 8 times [2022-01-18 15:42:12,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:12,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760050001] [2022-01-18 15:42:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:12,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:12,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:12,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760050001] [2022-01-18 15:42:12,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760050001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:12,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153925772] [2022-01-18 15:42:12,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:12,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:12,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:12,771 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) [2022-01-18 15:42:12,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 15:42:12,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:12,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:12,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:42:12,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:12,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:12,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:13,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:13,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:13,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:42:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:13,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153925772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:13,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:13,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:42:13,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490406030] [2022-01-18 15:42:13,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:13,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:13,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:13,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:13,238 INFO L87 Difference]: Start difference. First operand 1188 states and 4648 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-01-18 15:42:14,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:14,571 INFO L93 Difference]: Finished difference Result 2154 states and 8269 transitions. [2022-01-18 15:42:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 15:42:14,572 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 26 [2022-01-18 15:42:14,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:14,576 INFO L225 Difference]: With dead ends: 2154 [2022-01-18 15:42:14,576 INFO L226 Difference]: Without dead ends: 2072 [2022-01-18 15:42:14,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=522, Invalid=2130, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:42:14,577 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 514 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:14,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 126 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1768 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:42:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-01-18 15:42:14,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1193. [2022-01-18 15:42:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 3.921979865771812) internal successors, (4675), 1192 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 4675 transitions. [2022-01-18 15:42:14,597 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 4675 transitions. Word has length 26 [2022-01-18 15:42:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:14,597 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 4675 transitions. [2022-01-18 15:42:14,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2022-01-18 15:42:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 4675 transitions. [2022-01-18 15:42:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:14,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:14,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:14,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:14,815 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,SelfDestructingSolverStorable44 [2022-01-18 15:42:14,815 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:14,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1294023441, now seen corresponding path program 5 times [2022-01-18 15:42:14,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:14,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615572187] [2022-01-18 15:42:14,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:14,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:14,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:14,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615572187] [2022-01-18 15:42:14,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615572187] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:14,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377419947] [2022-01-18 15:42:14,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:14,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:14,904 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) [2022-01-18 15:42:14,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 15:42:14,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:14,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:14,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:42:14,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:15,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:15,039 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 7 [2022-01-18 15:42:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:15,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:15,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:15,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:42:15,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:15,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:42:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:15,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377419947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:15,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:15,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:15,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580109597] [2022-01-18 15:42:15,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:15,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:15,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:15,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:15,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:15,229 INFO L87 Difference]: Start difference. First operand 1193 states and 4675 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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) [2022-01-18 15:42:15,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:15,671 INFO L93 Difference]: Finished difference Result 1715 states and 6702 transitions. [2022-01-18 15:42:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:42:15,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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 26 [2022-01-18 15:42:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:15,674 INFO L225 Difference]: With dead ends: 1715 [2022-01-18 15:42:15,675 INFO L226 Difference]: Without dead ends: 1615 [2022-01-18 15:42:15,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:42:15,676 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 194 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:15,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 78 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:42:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2022-01-18 15:42:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1203. [2022-01-18 15:42:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 3.940099833610649) internal successors, (4736), 1202 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 4736 transitions. [2022-01-18 15:42:15,695 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 4736 transitions. Word has length 26 [2022-01-18 15:42:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:15,695 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 4736 transitions. [2022-01-18 15:42:15,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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) [2022-01-18 15:42:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 4736 transitions. [2022-01-18 15:42:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:15,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:15,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:15,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:15,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:15,911 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash 472005091, now seen corresponding path program 6 times [2022-01-18 15:42:15,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:15,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575050374] [2022-01-18 15:42:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:15,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:16,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:16,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575050374] [2022-01-18 15:42:16,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575050374] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:16,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379674612] [2022-01-18 15:42:16,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:16,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:16,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:16,012 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) [2022-01-18 15:42:16,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 15:42:16,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:42:16,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:16,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:42:16,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:16,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:16,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:16,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:16,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:16,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:42:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:16,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379674612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:16,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:16,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 15:42:16,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421670548] [2022-01-18 15:42:16,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:16,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:42:16,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:16,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:42:16,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:42:16,539 INFO L87 Difference]: Start difference. First operand 1203 states and 4736 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:20,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:20,633 INFO L93 Difference]: Finished difference Result 5406 states and 19993 transitions. [2022-01-18 15:42:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 15:42:20,634 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:20,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:20,642 INFO L225 Difference]: With dead ends: 5406 [2022-01-18 15:42:20,642 INFO L226 Difference]: Without dead ends: 4667 [2022-01-18 15:42:20,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3541 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1585, Invalid=8117, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 15:42:20,645 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 923 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:20,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 269 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 2680 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 15:42:20,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2022-01-18 15:42:20,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 1262. [2022-01-18 15:42:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.985725614591594) internal successors, (5026), 1261 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 5026 transitions. [2022-01-18 15:42:20,677 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 5026 transitions. Word has length 26 [2022-01-18 15:42:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:20,677 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 5026 transitions. [2022-01-18 15:42:20,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 5026 transitions. [2022-01-18 15:42:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:20,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:20,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:20,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:20,894 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,SelfDestructingSolverStorable46 [2022-01-18 15:42:20,894 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:20,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1966484856, now seen corresponding path program 9 times [2022-01-18 15:42:20,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:20,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062762354] [2022-01-18 15:42:20,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:20,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:20,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:20,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062762354] [2022-01-18 15:42:20,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062762354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:20,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432754292] [2022-01-18 15:42:20,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:20,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:20,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:20,989 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) [2022-01-18 15:42:20,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 15:42:21,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:42:21,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:21,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:21,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:21,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:21,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:21,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:21,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:21,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:21,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:21,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:42:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:21,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432754292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:21,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:21,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:21,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858543855] [2022-01-18 15:42:21,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:21,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:21,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:21,279 INFO L87 Difference]: Start difference. First operand 1262 states and 5026 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:21,475 INFO L93 Difference]: Finished difference Result 1668 states and 6546 transitions. [2022-01-18 15:42:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:42:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:21,478 INFO L225 Difference]: With dead ends: 1668 [2022-01-18 15:42:21,478 INFO L226 Difference]: Without dead ends: 1661 [2022-01-18 15:42:21,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:21,479 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:21,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 106 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 533 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2022-01-18 15:42:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-01-18 15:42:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1340. [2022-01-18 15:42:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 3.9596713965646004) internal successors, (5302), 1339 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 5302 transitions. [2022-01-18 15:42:21,499 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 5302 transitions. Word has length 26 [2022-01-18 15:42:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:21,499 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 5302 transitions. [2022-01-18 15:42:21,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 5302 transitions. [2022-01-18 15:42:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:21,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:21,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:21,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:21,715 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,SelfDestructingSolverStorable47 [2022-01-18 15:42:21,715 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:21,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1995114007, now seen corresponding path program 1 times [2022-01-18 15:42:21,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:21,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622496078] [2022-01-18 15:42:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:21,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:21,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:21,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622496078] [2022-01-18 15:42:21,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622496078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:21,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173776688] [2022-01-18 15:42:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:21,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:21,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:21,821 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) [2022-01-18 15:42:21,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 15:42:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:21,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:21,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:22,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:22,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:42:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:22,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:22,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:22,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:42:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:22,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:42:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:22,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173776688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:22,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:22,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:22,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875540996] [2022-01-18 15:42:22,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:22,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:22,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:22,135 INFO L87 Difference]: Start difference. First operand 1340 states and 5302 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:22,473 INFO L93 Difference]: Finished difference Result 1916 states and 7520 transitions. [2022-01-18 15:42:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:42:22,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:22,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:22,477 INFO L225 Difference]: With dead ends: 1916 [2022-01-18 15:42:22,477 INFO L226 Difference]: Without dead ends: 1809 [2022-01-18 15:42:22,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:42:22,478 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 164 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:22,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 97 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 862 Invalid, 0 Unknown, 276 Unchecked, 0.2s Time] [2022-01-18 15:42:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-01-18 15:42:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1304. [2022-01-18 15:42:22,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 3.9693016116653874) internal successors, (5172), 1303 states have internal predecessors, (5172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 5172 transitions. [2022-01-18 15:42:22,498 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 5172 transitions. Word has length 26 [2022-01-18 15:42:22,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:22,498 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 5172 transitions. [2022-01-18 15:42:22,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:22,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 5172 transitions. [2022-01-18 15:42:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:22,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:22,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:22,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 15:42:22,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 15:42:22,701 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1854960793, now seen corresponding path program 9 times [2022-01-18 15:42:22,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:22,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399161665] [2022-01-18 15:42:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:22,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:22,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:22,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399161665] [2022-01-18 15:42:22,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399161665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:22,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494177936] [2022-01-18 15:42:22,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:22,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:22,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:22,793 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) [2022-01-18 15:42:22,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 15:42:22,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:42:22,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:22,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:22,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:22,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:22,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:42:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:22,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:23,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:23,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:42:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:23,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:42:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:23,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494177936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:23,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:23,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:23,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229975022] [2022-01-18 15:42:23,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:23,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:23,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:23,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:23,114 INFO L87 Difference]: Start difference. First operand 1304 states and 5172 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:23,517 INFO L93 Difference]: Finished difference Result 1912 states and 7506 transitions. [2022-01-18 15:42:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:42:23,518 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:23,521 INFO L225 Difference]: With dead ends: 1912 [2022-01-18 15:42:23,521 INFO L226 Difference]: Without dead ends: 1831 [2022-01-18 15:42:23,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:42:23,521 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 149 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:23,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 95 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 819 Invalid, 0 Unknown, 254 Unchecked, 0.3s Time] [2022-01-18 15:42:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2022-01-18 15:42:23,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1296. [2022-01-18 15:42:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.9791505791505792) internal successors, (5153), 1295 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 5153 transitions. [2022-01-18 15:42:23,541 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 5153 transitions. Word has length 26 [2022-01-18 15:42:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:23,541 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 5153 transitions. [2022-01-18 15:42:23,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 5153 transitions. [2022-01-18 15:42:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:23,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:23,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:23,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:23,758 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,SelfDestructingSolverStorable49 [2022-01-18 15:42:23,759 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:23,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2039399989, now seen corresponding path program 10 times [2022-01-18 15:42:23,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:23,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118798122] [2022-01-18 15:42:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:23,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:23,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:23,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118798122] [2022-01-18 15:42:23,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118798122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:23,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830020386] [2022-01-18 15:42:23,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:23,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:23,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:23,840 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) [2022-01-18 15:42:23,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 15:42:23,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:23,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:23,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:23,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:24,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:24,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:42:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:24,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:24,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:24,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:24,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:24,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830020386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:24,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:24,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:24,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245722460] [2022-01-18 15:42:24,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:24,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:24,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:24,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:24,223 INFO L87 Difference]: Start difference. First operand 1296 states and 5153 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:24,559 INFO L93 Difference]: Finished difference Result 2018 states and 7870 transitions. [2022-01-18 15:42:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:42:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:24,563 INFO L225 Difference]: With dead ends: 2018 [2022-01-18 15:42:24,564 INFO L226 Difference]: Without dead ends: 1930 [2022-01-18 15:42:24,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:24,564 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:24,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 115 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 674 Invalid, 0 Unknown, 382 Unchecked, 0.3s Time] [2022-01-18 15:42:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2022-01-18 15:42:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1308. [2022-01-18 15:42:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 3.9808722264728384) internal successors, (5203), 1307 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 5203 transitions. [2022-01-18 15:42:24,585 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 5203 transitions. Word has length 26 [2022-01-18 15:42:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:24,585 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 5203 transitions. [2022-01-18 15:42:24,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 5203 transitions. [2022-01-18 15:42:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:24,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:24,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:24,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:24,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:24,803 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:24,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1239474505, now seen corresponding path program 1 times [2022-01-18 15:42:24,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:24,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497280477] [2022-01-18 15:42:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:24,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:24,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:24,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497280477] [2022-01-18 15:42:24,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497280477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:24,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981611563] [2022-01-18 15:42:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:24,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:24,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:24,889 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) [2022-01-18 15:42:24,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 15:42:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:24,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:24,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:25,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:25,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:42:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:25,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:25,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:25,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:25,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:25,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:42:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:25,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981611563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:25,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:25,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:25,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504937369] [2022-01-18 15:42:25,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:25,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:25,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:25,272 INFO L87 Difference]: Start difference. First operand 1308 states and 5203 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:25,646 INFO L93 Difference]: Finished difference Result 1983 states and 7755 transitions. [2022-01-18 15:42:25,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:42:25,646 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:25,650 INFO L225 Difference]: With dead ends: 1983 [2022-01-18 15:42:25,650 INFO L226 Difference]: Without dead ends: 1942 [2022-01-18 15:42:25,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:42:25,650 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 182 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:25,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 93 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 816 Invalid, 0 Unknown, 269 Unchecked, 0.3s Time] [2022-01-18 15:42:25,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2022-01-18 15:42:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1276. [2022-01-18 15:42:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 3.9819607843137255) internal successors, (5077), 1275 states have internal predecessors, (5077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 5077 transitions. [2022-01-18 15:42:25,668 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 5077 transitions. Word has length 26 [2022-01-18 15:42:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:25,669 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 5077 transitions. [2022-01-18 15:42:25,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 5077 transitions. [2022-01-18 15:42:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:25,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:25,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:25,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:25,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:25,886 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:25,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1670154954, now seen corresponding path program 10 times [2022-01-18 15:42:25,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:25,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061424445] [2022-01-18 15:42:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:25,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:25,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061424445] [2022-01-18 15:42:25,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061424445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:25,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412700201] [2022-01-18 15:42:25,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:25,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:25,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:25,960 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) [2022-01-18 15:42:25,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 15:42:26,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:26,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:26,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:26,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:26,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:42:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:26,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:26,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:26,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:26,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:26,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:42:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:26,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412700201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:26,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:26,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:42:26,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345279757] [2022-01-18 15:42:26,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:26,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:26,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:26,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:26,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:26,318 INFO L87 Difference]: Start difference. First operand 1276 states and 5077 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:26,618 INFO L93 Difference]: Finished difference Result 1809 states and 7105 transitions. [2022-01-18 15:42:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:42:26,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:26,621 INFO L225 Difference]: With dead ends: 1809 [2022-01-18 15:42:26,621 INFO L226 Difference]: Without dead ends: 1736 [2022-01-18 15:42:26,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:42:26,622 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:26,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 77 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-01-18 15:42:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2022-01-18 15:42:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1285. [2022-01-18 15:42:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.9828660436137073) internal successors, (5114), 1284 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 5114 transitions. [2022-01-18 15:42:26,639 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 5114 transitions. Word has length 26 [2022-01-18 15:42:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:26,639 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 5114 transitions. [2022-01-18 15:42:26,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 5114 transitions. [2022-01-18 15:42:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:26,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:26,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:26,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 15:42:26,854 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,SelfDestructingSolverStorable52 [2022-01-18 15:42:26,855 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1441380884, now seen corresponding path program 11 times [2022-01-18 15:42:26,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:26,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377150696] [2022-01-18 15:42:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:26,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:26,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:26,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377150696] [2022-01-18 15:42:26,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377150696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:26,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229008767] [2022-01-18 15:42:26,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:26,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:26,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:26,958 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) [2022-01-18 15:42:26,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 15:42:26,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:42:26,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:26,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:26,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:27,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:27,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:27,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:27,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:27,289 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 16 [2022-01-18 15:42:27,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:27,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:27,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229008767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:27,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:27,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:42:27,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697313538] [2022-01-18 15:42:27,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:27,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:27,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:27,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:27,315 INFO L87 Difference]: Start difference. First operand 1285 states and 5114 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) [2022-01-18 15:42:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:27,805 INFO L93 Difference]: Finished difference Result 1821 states and 7185 transitions. [2022-01-18 15:42:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:42:27,805 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 26 [2022-01-18 15:42:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:27,809 INFO L225 Difference]: With dead ends: 1821 [2022-01-18 15:42:27,809 INFO L226 Difference]: Without dead ends: 1738 [2022-01-18 15:42:27,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:42:27,809 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:27,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 90 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1010 Invalid, 0 Unknown, 184 Unchecked, 0.4s Time] [2022-01-18 15:42:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2022-01-18 15:42:27,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1277. [2022-01-18 15:42:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 3.9827586206896552) internal successors, (5082), 1276 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 5082 transitions. [2022-01-18 15:42:27,827 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 5082 transitions. Word has length 26 [2022-01-18 15:42:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:27,827 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 5082 transitions. [2022-01-18 15:42:27,827 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) [2022-01-18 15:42:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 5082 transitions. [2022-01-18 15:42:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:27,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:27,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:27,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 15:42:28,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:28,043 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:28,044 INFO L85 PathProgramCache]: Analyzing trace with hash -876774731, now seen corresponding path program 11 times [2022-01-18 15:42:28,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:28,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390643305] [2022-01-18 15:42:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:28,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:28,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390643305] [2022-01-18 15:42:28,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390643305] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352652052] [2022-01-18 15:42:28,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:28,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:28,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:28,116 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) [2022-01-18 15:42:28,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 15:42:28,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:28,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:28,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:28,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:28,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:28,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:28,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:28,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-01-18 15:42:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:28,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352652052] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:28,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:28,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:42:28,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180074237] [2022-01-18 15:42:28,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:28,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:28,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:28,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:28,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:28,520 INFO L87 Difference]: Start difference. First operand 1277 states and 5082 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2022-01-18 15:42:29,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:29,949 INFO L93 Difference]: Finished difference Result 2727 states and 10219 transitions. [2022-01-18 15:42:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:42:29,949 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2022-01-18 15:42:29,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:29,953 INFO L225 Difference]: With dead ends: 2727 [2022-01-18 15:42:29,953 INFO L226 Difference]: Without dead ends: 2571 [2022-01-18 15:42:29,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:42:29,954 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 317 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:29,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 127 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1831 Invalid, 0 Unknown, 98 Unchecked, 0.7s Time] [2022-01-18 15:42:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2022-01-18 15:42:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1286. [2022-01-18 15:42:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 3.982101167315175) internal successors, (5117), 1285 states have internal predecessors, (5117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 5117 transitions. [2022-01-18 15:42:29,975 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 5117 transitions. Word has length 26 [2022-01-18 15:42:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:29,976 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 5117 transitions. [2022-01-18 15:42:29,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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) [2022-01-18 15:42:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 5117 transitions. [2022-01-18 15:42:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:29,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:29,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:29,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:30,193 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,SelfDestructingSolverStorable54 [2022-01-18 15:42:30,201 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:30,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:30,201 INFO L85 PathProgramCache]: Analyzing trace with hash 603578721, now seen corresponding path program 12 times [2022-01-18 15:42:30,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:30,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977994213] [2022-01-18 15:42:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:30,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:30,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:30,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977994213] [2022-01-18 15:42:30,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977994213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:30,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025546107] [2022-01-18 15:42:30,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:30,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:30,264 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) [2022-01-18 15:42:30,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 15:42:30,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:42:30,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:30,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:30,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:30,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:30,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:30,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:30,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:30,482 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 11 treesize of output 16 [2022-01-18 15:42:30,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:30,488 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 11 treesize of output 3 [2022-01-18 15:42:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:30,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025546107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:30,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:30,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:42:30,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340403615] [2022-01-18 15:42:30,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:30,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:30,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:30,499 INFO L87 Difference]: Start difference. First operand 1286 states and 5117 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 15:42:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:30,756 INFO L93 Difference]: Finished difference Result 1811 states and 7115 transitions. [2022-01-18 15:42:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:42:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 26 [2022-01-18 15:42:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:30,760 INFO L225 Difference]: With dead ends: 1811 [2022-01-18 15:42:30,760 INFO L226 Difference]: Without dead ends: 1729 [2022-01-18 15:42:30,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:30,760 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:30,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 103 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 879 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2022-01-18 15:42:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-01-18 15:42:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1284. [2022-01-18 15:42:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.9820732657833204) internal successors, (5109), 1283 states have internal predecessors, (5109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 5109 transitions. [2022-01-18 15:42:30,778 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 5109 transitions. Word has length 26 [2022-01-18 15:42:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:30,778 INFO L470 AbstractCegarLoop]: Abstraction has 1284 states and 5109 transitions. [2022-01-18 15:42:30,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 15:42:30,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 5109 transitions. [2022-01-18 15:42:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:30,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:30,781 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:30,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:30,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:30,996 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2089503184, now seen corresponding path program 12 times [2022-01-18 15:42:30,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:30,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616853990] [2022-01-18 15:42:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:30,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:31,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616853990] [2022-01-18 15:42:31,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616853990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989230879] [2022-01-18 15:42:31,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:31,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:31,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:31,091 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) [2022-01-18 15:42:31,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 15:42:31,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:42:31,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:31,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:31,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:31,309 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 16 treesize of output 10 [2022-01-18 15:42:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:31,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:31,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:31,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:42:31,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:31,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:31,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989230879] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:31,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:31,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:31,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910319293] [2022-01-18 15:42:31,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:31,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:31,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:31,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:31,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:31,448 INFO L87 Difference]: Start difference. First operand 1284 states and 5109 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:32,005 INFO L93 Difference]: Finished difference Result 2584 states and 10021 transitions. [2022-01-18 15:42:32,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:32,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:32,009 INFO L225 Difference]: With dead ends: 2584 [2022-01-18 15:42:32,010 INFO L226 Difference]: Without dead ends: 2503 [2022-01-18 15:42:32,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:42:32,010 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 250 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:32,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 110 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1029 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-01-18 15:42:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-01-18 15:42:32,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1324. [2022-01-18 15:42:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9614512471655328) internal successors, (5241), 1323 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5241 transitions. [2022-01-18 15:42:32,070 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5241 transitions. Word has length 26 [2022-01-18 15:42:32,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:32,070 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 5241 transitions. [2022-01-18 15:42:32,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5241 transitions. [2022-01-18 15:42:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:32,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:32,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:32,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:32,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:32,288 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1977979121, now seen corresponding path program 13 times [2022-01-18 15:42:32,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:32,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329429582] [2022-01-18 15:42:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:32,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:32,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:32,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329429582] [2022-01-18 15:42:32,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329429582] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:32,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173426632] [2022-01-18 15:42:32,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:32,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:32,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:32,370 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) [2022-01-18 15:42:32,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 15:42:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:32,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:32,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:32,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:32,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:32,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:32,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:32,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:32,715 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 [2022-01-18 15:42:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:32,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173426632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:32,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:32,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:32,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941416848] [2022-01-18 15:42:32,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:32,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:32,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:32,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:32,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:32,732 INFO L87 Difference]: Start difference. First operand 1324 states and 5241 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:33,131 INFO L93 Difference]: Finished difference Result 2764 states and 10705 transitions. [2022-01-18 15:42:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:33,136 INFO L225 Difference]: With dead ends: 2764 [2022-01-18 15:42:33,137 INFO L226 Difference]: Without dead ends: 2683 [2022-01-18 15:42:33,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:42:33,137 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 283 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:33,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 100 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 642 Invalid, 0 Unknown, 309 Unchecked, 0.3s Time] [2022-01-18 15:42:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2022-01-18 15:42:33,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 1318. [2022-01-18 15:42:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.9696279422930902) internal successors, (5228), 1317 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) [2022-01-18 15:42:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 5228 transitions. [2022-01-18 15:42:33,159 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 5228 transitions. Word has length 26 [2022-01-18 15:42:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:33,159 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 5228 transitions. [2022-01-18 15:42:33,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 5228 transitions. [2022-01-18 15:42:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:33,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:33,162 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:33,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:33,375 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,SelfDestructingSolverStorable57 [2022-01-18 15:42:33,375 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1583944559, now seen corresponding path program 1 times [2022-01-18 15:42:33,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:33,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264121313] [2022-01-18 15:42:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:33,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:33,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:33,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264121313] [2022-01-18 15:42:33,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264121313] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:33,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85397806] [2022-01-18 15:42:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:33,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:33,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:33,454 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) [2022-01-18 15:42:33,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 15:42:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:33,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:33,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:33,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:42:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:33,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:33,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:33,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:42:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:33,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:42:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:33,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85397806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:33,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:33,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:33,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235871172] [2022-01-18 15:42:33,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:33,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:33,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:33,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:33,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:33,850 INFO L87 Difference]: Start difference. First operand 1318 states and 5228 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:34,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:34,332 INFO L93 Difference]: Finished difference Result 2530 states and 9789 transitions. [2022-01-18 15:42:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:34,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:34,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:34,336 INFO L225 Difference]: With dead ends: 2530 [2022-01-18 15:42:34,336 INFO L226 Difference]: Without dead ends: 2509 [2022-01-18 15:42:34,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:42:34,337 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 256 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:34,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 123 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 897 Invalid, 0 Unknown, 329 Unchecked, 0.4s Time] [2022-01-18 15:42:34,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2022-01-18 15:42:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1324. [2022-01-18 15:42:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9614512471655328) internal successors, (5241), 1323 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5241 transitions. [2022-01-18 15:42:34,358 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5241 transitions. Word has length 26 [2022-01-18 15:42:34,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:34,358 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 5241 transitions. [2022-01-18 15:42:34,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5241 transitions. [2022-01-18 15:42:34,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:34,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:34,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:34,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:34,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 15:42:34,567 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:34,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1472420496, now seen corresponding path program 1 times [2022-01-18 15:42:34,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:34,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176235615] [2022-01-18 15:42:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:34,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:34,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:34,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176235615] [2022-01-18 15:42:34,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176235615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:34,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305473139] [2022-01-18 15:42:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:34,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:34,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:34,647 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) [2022-01-18 15:42:34,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 15:42:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:34,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:34,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:34,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:42:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:34,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:34,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:34,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:42:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:35,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:35,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305473139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:35,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:35,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:35,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439267541] [2022-01-18 15:42:35,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:35,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:35,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:35,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:35,021 INFO L87 Difference]: Start difference. First operand 1324 states and 5241 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:35,459 INFO L93 Difference]: Finished difference Result 2455 states and 9513 transitions. [2022-01-18 15:42:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:35,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:35,464 INFO L225 Difference]: With dead ends: 2455 [2022-01-18 15:42:35,464 INFO L226 Difference]: Without dead ends: 2384 [2022-01-18 15:42:35,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:42:35,465 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 276 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:35,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 82 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 764 Invalid, 0 Unknown, 255 Unchecked, 0.3s Time] [2022-01-18 15:42:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2022-01-18 15:42:35,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1326. [2022-01-18 15:42:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 3.972830188679245) internal successors, (5264), 1325 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 5264 transitions. [2022-01-18 15:42:35,487 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 5264 transitions. Word has length 26 [2022-01-18 15:42:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:35,487 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 5264 transitions. [2022-01-18 15:42:35,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 5264 transitions. [2022-01-18 15:42:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:35,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:35,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:35,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:35,699 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,SelfDestructingSolverStorable59 [2022-01-18 15:42:35,700 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash -852154415, now seen corresponding path program 1 times [2022-01-18 15:42:35,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:35,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387806402] [2022-01-18 15:42:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:35,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:35,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:35,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387806402] [2022-01-18 15:42:35,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387806402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:35,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487664333] [2022-01-18 15:42:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:35,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:35,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:35,788 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) [2022-01-18 15:42:35,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 15:42:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:35,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:35,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:35,999 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:42:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:36,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:36,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:36,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:36,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:36,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:42:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:36,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487664333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:36,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:36,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:36,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052037531] [2022-01-18 15:42:36,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:36,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:36,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:36,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:36,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:36,108 INFO L87 Difference]: Start difference. First operand 1326 states and 5264 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:36,495 INFO L93 Difference]: Finished difference Result 2327 states and 8999 transitions. [2022-01-18 15:42:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:42:36,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:36,500 INFO L225 Difference]: With dead ends: 2327 [2022-01-18 15:42:36,500 INFO L226 Difference]: Without dead ends: 2286 [2022-01-18 15:42:36,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:42:36,500 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 208 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:36,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 113 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1180 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2022-01-18 15:42:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-01-18 15:42:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1332. [2022-01-18 15:42:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.9691960931630352) internal successors, (5283), 1331 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 5283 transitions. [2022-01-18 15:42:36,522 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 5283 transitions. Word has length 26 [2022-01-18 15:42:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:36,522 INFO L470 AbstractCegarLoop]: Abstraction has 1332 states and 5283 transitions. [2022-01-18 15:42:36,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 5283 transitions. [2022-01-18 15:42:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:36,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:36,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:36,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:36,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:36,730 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1357713040, now seen corresponding path program 1 times [2022-01-18 15:42:36,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:36,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667716694] [2022-01-18 15:42:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:36,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:36,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:36,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667716694] [2022-01-18 15:42:36,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667716694] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:36,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138645592] [2022-01-18 15:42:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:36,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:36,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:36,806 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) [2022-01-18 15:42:36,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 15:42:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:36,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:36,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:37,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:37,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:42:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:37,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:37,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:37,145 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 11 treesize of output 16 [2022-01-18 15:42:37,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:37,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:42:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:37,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138645592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:37,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:37,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:37,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726830451] [2022-01-18 15:42:37,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:37,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:37,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:37,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:37,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:37,172 INFO L87 Difference]: Start difference. First operand 1332 states and 5283 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:37,540 INFO L93 Difference]: Finished difference Result 2137 states and 8274 transitions. [2022-01-18 15:42:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:42:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:37,544 INFO L225 Difference]: With dead ends: 2137 [2022-01-18 15:42:37,544 INFO L226 Difference]: Without dead ends: 2066 [2022-01-18 15:42:37,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:42:37,545 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 159 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:37,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 134 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 866 Invalid, 0 Unknown, 358 Unchecked, 0.3s Time] [2022-01-18 15:42:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2022-01-18 15:42:37,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1294. [2022-01-18 15:42:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.9729311678267596) internal successors, (5137), 1293 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 5137 transitions. [2022-01-18 15:42:37,566 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 5137 transitions. Word has length 26 [2022-01-18 15:42:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:37,566 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 5137 transitions. [2022-01-18 15:42:37,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:37,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 5137 transitions. [2022-01-18 15:42:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:37,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:37,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:37,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 15:42:37,779 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,SelfDestructingSolverStorable61 [2022-01-18 15:42:37,779 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:37,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2004238780, now seen corresponding path program 7 times [2022-01-18 15:42:37,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:37,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390056013] [2022-01-18 15:42:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:37,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:37,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:37,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390056013] [2022-01-18 15:42:37,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390056013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:37,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291958455] [2022-01-18 15:42:37,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:37,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:37,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:37,859 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) [2022-01-18 15:42:37,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 15:42:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:37,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:37,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:37,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:37,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:38,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:38,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:38,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:38,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:38,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:38,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291958455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:38,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:38,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:42:38,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484552524] [2022-01-18 15:42:38,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:38,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:38,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:38,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:38,097 INFO L87 Difference]: Start difference. First operand 1294 states and 5137 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-01-18 15:42:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:38,565 INFO L93 Difference]: Finished difference Result 1808 states and 7151 transitions. [2022-01-18 15:42:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:42:38,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 26 [2022-01-18 15:42:38,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:38,568 INFO L225 Difference]: With dead ends: 1808 [2022-01-18 15:42:38,568 INFO L226 Difference]: Without dead ends: 1735 [2022-01-18 15:42:38,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:42:38,569 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 235 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:38,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 72 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 796 Invalid, 0 Unknown, 182 Unchecked, 0.3s Time] [2022-01-18 15:42:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2022-01-18 15:42:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1315. [2022-01-18 15:42:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1314 states have (on average 3.9733637747336377) internal successors, (5221), 1314 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) [2022-01-18 15:42:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 5221 transitions. [2022-01-18 15:42:38,588 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 5221 transitions. Word has length 26 [2022-01-18 15:42:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:38,589 INFO L470 AbstractCegarLoop]: Abstraction has 1315 states and 5221 transitions. [2022-01-18 15:42:38,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-01-18 15:42:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 5221 transitions. [2022-01-18 15:42:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:38,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:38,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:38,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:38,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:38,806 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:38,807 INFO L85 PathProgramCache]: Analyzing trace with hash -97195330, now seen corresponding path program 8 times [2022-01-18 15:42:38,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:38,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598342246] [2022-01-18 15:42:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:38,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:38,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:38,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598342246] [2022-01-18 15:42:38,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598342246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:38,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731612681] [2022-01-18 15:42:38,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:38,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:38,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:38,910 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) [2022-01-18 15:42:38,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 15:42:38,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:38,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:38,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:42:38,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:39,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:39,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:39,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:39,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:39,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-01-18 15:42:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:39,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731612681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:39,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:39,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 15:42:39,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296681601] [2022-01-18 15:42:39,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:39,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:39,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:39,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:39,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:39,285 INFO L87 Difference]: Start difference. First operand 1315 states and 5221 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:39,890 INFO L93 Difference]: Finished difference Result 1813 states and 7188 transitions. [2022-01-18 15:42:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:42:39,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:39,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:39,893 INFO L225 Difference]: With dead ends: 1813 [2022-01-18 15:42:39,893 INFO L226 Difference]: Without dead ends: 1738 [2022-01-18 15:42:39,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:42:39,894 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 267 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:39,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 107 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:42:39,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2022-01-18 15:42:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1306. [2022-01-18 15:42:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.971647509578544) internal successors, (5183), 1305 states have internal predecessors, (5183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5183 transitions. [2022-01-18 15:42:39,911 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5183 transitions. Word has length 26 [2022-01-18 15:42:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:39,911 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 5183 transitions. [2022-01-18 15:42:39,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5183 transitions. [2022-01-18 15:42:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:39,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:39,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:39,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 15:42:40,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:40,129 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:40,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:40,130 INFO L85 PathProgramCache]: Analyzing trace with hash 792300773, now seen corresponding path program 7 times [2022-01-18 15:42:40,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:40,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170761661] [2022-01-18 15:42:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:40,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:40,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:40,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170761661] [2022-01-18 15:42:40,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170761661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:40,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793867014] [2022-01-18 15:42:40,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:40,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:40,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:40,211 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) [2022-01-18 15:42:40,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 15:42:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:40,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:40,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:40,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:40,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:42:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:40,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:40,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:40,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:42:40,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:40,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:42:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:40,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793867014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:40,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:40,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 15:42:40,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248325737] [2022-01-18 15:42:40,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:40,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:42:40,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:40,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:42:40,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:42:40,486 INFO L87 Difference]: Start difference. First operand 1306 states and 5183 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2022-01-18 15:42:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:40,999 INFO L93 Difference]: Finished difference Result 1855 states and 7330 transitions. [2022-01-18 15:42:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:42:40,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 26 [2022-01-18 15:42:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:41,002 INFO L225 Difference]: With dead ends: 1855 [2022-01-18 15:42:41,002 INFO L226 Difference]: Without dead ends: 1773 [2022-01-18 15:42:41,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:42:41,002 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:41,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 99 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1224 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-01-18 15:42:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2022-01-18 15:42:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1308. [2022-01-18 15:42:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 3.9739862280030605) internal successors, (5194), 1307 states have internal predecessors, (5194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 5194 transitions. [2022-01-18 15:42:41,020 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 5194 transitions. Word has length 26 [2022-01-18 15:42:41,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:41,020 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 5194 transitions. [2022-01-18 15:42:41,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2022-01-18 15:42:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 5194 transitions. [2022-01-18 15:42:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:41,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:41,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:41,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:41,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:41,238 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:41,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1200629221, now seen corresponding path program 8 times [2022-01-18 15:42:41,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:41,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826388901] [2022-01-18 15:42:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:41,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:41,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:41,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826388901] [2022-01-18 15:42:41,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826388901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:41,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125295131] [2022-01-18 15:42:41,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:41,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:41,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:41,360 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) [2022-01-18 15:42:41,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 15:42:41,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:41,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:41,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:42:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:41,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:41,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:41,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:41,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:41,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-01-18 15:42:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:41,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125295131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:41,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:41,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 15:42:41,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766818422] [2022-01-18 15:42:41,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:41,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:42:41,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:41,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:42:41,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:42:41,927 INFO L87 Difference]: Start difference. First operand 1308 states and 5194 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:45,804 INFO L93 Difference]: Finished difference Result 5298 states and 19696 transitions. [2022-01-18 15:42:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 15:42:45,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:45,813 INFO L225 Difference]: With dead ends: 5298 [2022-01-18 15:42:45,813 INFO L226 Difference]: Without dead ends: 4835 [2022-01-18 15:42:45,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2582 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1332, Invalid=6678, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 15:42:45,814 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1076 mSDsluCounter, 2274 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 3962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1344 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:45,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 331 Invalid, 3962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 2355 Invalid, 0 Unknown, 1344 Unchecked, 1.2s Time] [2022-01-18 15:42:45,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2022-01-18 15:42:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 1343. [2022-01-18 15:42:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 4.004470938897168) internal successors, (5374), 1342 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) [2022-01-18 15:42:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 5374 transitions. [2022-01-18 15:42:45,849 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 5374 transitions. Word has length 26 [2022-01-18 15:42:45,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:45,849 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 5374 transitions. [2022-01-18 15:42:45,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 5374 transitions. [2022-01-18 15:42:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:45,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:45,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:45,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:46,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:46,066 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:46,067 INFO L85 PathProgramCache]: Analyzing trace with hash -458752760, now seen corresponding path program 9 times [2022-01-18 15:42:46,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:46,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317090231] [2022-01-18 15:42:46,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:46,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:46,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:46,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317090231] [2022-01-18 15:42:46,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317090231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:46,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689870898] [2022-01-18 15:42:46,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:46,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:46,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:46,168 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) [2022-01-18 15:42:46,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 15:42:46,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:42:46,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:42:46,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:46,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:46,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:46,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:46,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:46,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-01-18 15:42:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:46,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689870898] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:46,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:46,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 15:42:46,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377471620] [2022-01-18 15:42:46,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:46,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:42:46,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:46,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:42:46,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:42:46,803 INFO L87 Difference]: Start difference. First operand 1343 states and 5374 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:48,629 INFO L93 Difference]: Finished difference Result 3185 states and 12295 transitions. [2022-01-18 15:42:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:42:48,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:48,651 INFO L225 Difference]: With dead ends: 3185 [2022-01-18 15:42:48,652 INFO L226 Difference]: Without dead ends: 3036 [2022-01-18 15:42:48,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=734, Invalid=3172, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 15:42:48,653 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 612 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1654 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:48,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 271 Invalid, 3705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1929 Invalid, 0 Unknown, 1654 Unchecked, 0.7s Time] [2022-01-18 15:42:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2022-01-18 15:42:48,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 1380. [2022-01-18 15:42:48,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.992748368382886) internal successors, (5506), 1379 states have internal predecessors, (5506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5506 transitions. [2022-01-18 15:42:48,678 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5506 transitions. Word has length 26 [2022-01-18 15:42:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:48,678 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 5506 transitions. [2022-01-18 15:42:48,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5506 transitions. [2022-01-18 15:42:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:48,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:48,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:48,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:48,895 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,SelfDestructingSolverStorable66 [2022-01-18 15:42:48,895 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2035193115, now seen corresponding path program 9 times [2022-01-18 15:42:48,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:48,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817152481] [2022-01-18 15:42:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:48,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:48,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817152481] [2022-01-18 15:42:48,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817152481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086405376] [2022-01-18 15:42:48,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:48,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:48,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:49,000 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) [2022-01-18 15:42:49,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 15:42:49,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:42:49,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:49,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:42:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:49,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:49,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:49,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:49,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:49,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:49,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086405376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:49,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:49,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 15:42:49,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904704626] [2022-01-18 15:42:49,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:49,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:42:49,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:42:49,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:42:49,590 INFO L87 Difference]: Start difference. First operand 1380 states and 5506 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:51,239 INFO L93 Difference]: Finished difference Result 3229 states and 12610 transitions. [2022-01-18 15:42:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:42:51,240 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:51,246 INFO L225 Difference]: With dead ends: 3229 [2022-01-18 15:42:51,246 INFO L226 Difference]: Without dead ends: 3107 [2022-01-18 15:42:51,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=647, Invalid=3259, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 15:42:51,246 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 598 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2098 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:51,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 206 Invalid, 3787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1574 Invalid, 0 Unknown, 2098 Unchecked, 0.5s Time] [2022-01-18 15:42:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2022-01-18 15:42:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 1369. [2022-01-18 15:42:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 3.999269005847953) internal successors, (5471), 1368 states have internal predecessors, (5471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 5471 transitions. [2022-01-18 15:42:51,271 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 5471 transitions. Word has length 26 [2022-01-18 15:42:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:51,271 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 5471 transitions. [2022-01-18 15:42:51,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 5471 transitions. [2022-01-18 15:42:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:51,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:51,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:51,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:51,489 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,SelfDestructingSolverStorable67 [2022-01-18 15:42:51,489 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:51,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:51,490 INFO L85 PathProgramCache]: Analyzing trace with hash -66469456, now seen corresponding path program 10 times [2022-01-18 15:42:51,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:51,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601871187] [2022-01-18 15:42:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:51,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:51,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601871187] [2022-01-18 15:42:51,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601871187] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317706546] [2022-01-18 15:42:51,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:51,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:51,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:51,550 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) [2022-01-18 15:42:51,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 15:42:51,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:51,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:51,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:51,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:51,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:42:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:51,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:51,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:51,781 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:42:51,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:51,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:42:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:51,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317706546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:51,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:51,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:51,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29019792] [2022-01-18 15:42:51,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:51,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:51,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:51,800 INFO L87 Difference]: Start difference. First operand 1369 states and 5471 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:52,063 INFO L93 Difference]: Finished difference Result 2240 states and 8958 transitions. [2022-01-18 15:42:52,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:42:52,063 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:52,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:52,068 INFO L225 Difference]: With dead ends: 2240 [2022-01-18 15:42:52,068 INFO L226 Difference]: Without dead ends: 2157 [2022-01-18 15:42:52,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:52,068 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:52,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 111 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 693 Invalid, 0 Unknown, 266 Unchecked, 0.2s Time] [2022-01-18 15:42:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2022-01-18 15:42:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1395. [2022-01-18 15:42:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 3.9878048780487805) internal successors, (5559), 1394 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 5559 transitions. [2022-01-18 15:42:52,089 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 5559 transitions. Word has length 26 [2022-01-18 15:42:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:52,090 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 5559 transitions. [2022-01-18 15:42:52,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:52,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 5559 transitions. [2022-01-18 15:42:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:52,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:52,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:52,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:52,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 15:42:52,308 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:52,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash -177993519, now seen corresponding path program 10 times [2022-01-18 15:42:52,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:52,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126400089] [2022-01-18 15:42:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:52,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:52,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126400089] [2022-01-18 15:42:52,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126400089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461288737] [2022-01-18 15:42:52,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:52,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:52,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:52,385 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) [2022-01-18 15:42:52,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 15:42:52,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:52,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:52,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:52,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:52,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:52,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:42:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:52,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:52,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:52,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:42:52,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:52,738 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:42:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:52,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461288737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:52,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:52,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:42:52,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204031618] [2022-01-18 15:42:52,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:52,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:52,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:52,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:52,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:52,755 INFO L87 Difference]: Start difference. First operand 1395 states and 5559 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:53,275 INFO L93 Difference]: Finished difference Result 2647 states and 10357 transitions. [2022-01-18 15:42:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:42:53,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:53,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:53,281 INFO L225 Difference]: With dead ends: 2647 [2022-01-18 15:42:53,281 INFO L226 Difference]: Without dead ends: 2576 [2022-01-18 15:42:53,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:42:53,281 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 249 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:53,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 125 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 985 Invalid, 0 Unknown, 261 Unchecked, 0.4s Time] [2022-01-18 15:42:53,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2022-01-18 15:42:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1389. [2022-01-18 15:42:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1388 states have (on average 3.9855907780979827) internal successors, (5532), 1388 states have internal predecessors, (5532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 5532 transitions. [2022-01-18 15:42:53,307 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 5532 transitions. Word has length 26 [2022-01-18 15:42:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:53,308 INFO L470 AbstractCegarLoop]: Abstraction has 1389 states and 5532 transitions. [2022-01-18 15:42:53,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 5532 transitions. [2022-01-18 15:42:53,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:53,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:53,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:53,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:53,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:53,519 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:53,520 INFO L85 PathProgramCache]: Analyzing trace with hash 823120856, now seen corresponding path program 11 times [2022-01-18 15:42:53,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:53,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290080447] [2022-01-18 15:42:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:53,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:53,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:53,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290080447] [2022-01-18 15:42:53,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290080447] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:53,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656128815] [2022-01-18 15:42:53,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:53,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:53,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:53,609 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) [2022-01-18 15:42:53,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 15:42:53,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:53,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:53,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:53,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:53,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:42:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:53,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:53,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:53,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:42:53,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:53,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:53,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656128815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:53,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:53,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2022-01-18 15:42:53,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104243297] [2022-01-18 15:42:53,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:53,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 15:42:53,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:53,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 15:42:53,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:42:53,910 INFO L87 Difference]: Start difference. First operand 1389 states and 5532 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-01-18 15:42:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:54,313 INFO L93 Difference]: Finished difference Result 2458 states and 9674 transitions. [2022-01-18 15:42:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:42:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 26 [2022-01-18 15:42:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:54,317 INFO L225 Difference]: With dead ends: 2458 [2022-01-18 15:42:54,317 INFO L226 Difference]: Without dead ends: 2387 [2022-01-18 15:42:54,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:42:54,318 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:54,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 132 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1062 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2022-01-18 15:42:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2022-01-18 15:42:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 1369. [2022-01-18 15:42:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 3.999269005847953) internal successors, (5471), 1368 states have internal predecessors, (5471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 5471 transitions. [2022-01-18 15:42:54,338 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 5471 transitions. Word has length 26 [2022-01-18 15:42:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:54,338 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 5471 transitions. [2022-01-18 15:42:54,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-01-18 15:42:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 5471 transitions. [2022-01-18 15:42:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:54,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:54,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:54,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:54,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:54,553 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:54,554 INFO L85 PathProgramCache]: Analyzing trace with hash -332652938, now seen corresponding path program 13 times [2022-01-18 15:42:54,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:54,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287600077] [2022-01-18 15:42:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:54,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:54,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:54,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287600077] [2022-01-18 15:42:54,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287600077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:54,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685120919] [2022-01-18 15:42:54,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:54,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:54,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:54,614 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) [2022-01-18 15:42:54,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 15:42:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:54,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:54,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:54,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:42:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:54,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:54,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:54,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:42:54,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:54,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:42:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:54,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685120919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:54,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:54,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:42:54,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96521088] [2022-01-18 15:42:54,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:54,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:42:54,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:54,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:42:54,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:42:54,944 INFO L87 Difference]: Start difference. First operand 1369 states and 5471 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 15:42:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:55,177 INFO L93 Difference]: Finished difference Result 1759 states and 6960 transitions. [2022-01-18 15:42:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:42:55,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 26 [2022-01-18 15:42:55,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:55,180 INFO L225 Difference]: With dead ends: 1759 [2022-01-18 15:42:55,180 INFO L226 Difference]: Without dead ends: 1708 [2022-01-18 15:42:55,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:42:55,180 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:55,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 66 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 687 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-01-18 15:42:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2022-01-18 15:42:55,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1375. [2022-01-18 15:42:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 4.000727802037845) internal successors, (5497), 1374 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 5497 transitions. [2022-01-18 15:42:55,198 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 5497 transitions. Word has length 26 [2022-01-18 15:42:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:55,198 INFO L470 AbstractCegarLoop]: Abstraction has 1375 states and 5497 transitions. [2022-01-18 15:42:55,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 15:42:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 5497 transitions. [2022-01-18 15:42:55,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:55,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:55,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:55,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:55,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:55,410 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1478895146, now seen corresponding path program 14 times [2022-01-18 15:42:55,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:55,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17654939] [2022-01-18 15:42:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:55,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:55,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:55,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17654939] [2022-01-18 15:42:55,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17654939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103963605] [2022-01-18 15:42:55,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:55,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:55,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:55,486 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) [2022-01-18 15:42:55,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 15:42:55,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:55,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:55,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:55,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:55,640 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 [2022-01-18 15:42:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:55,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:55,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:55,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:42:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:55,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103963605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:55,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:55,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:42:55,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958074250] [2022-01-18 15:42:55,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:55,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:55,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:55,958 INFO L87 Difference]: Start difference. First operand 1375 states and 5497 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:57,021 INFO L93 Difference]: Finished difference Result 2492 states and 9636 transitions. [2022-01-18 15:42:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 15:42:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:57,026 INFO L225 Difference]: With dead ends: 2492 [2022-01-18 15:42:57,026 INFO L226 Difference]: Without dead ends: 2402 [2022-01-18 15:42:57,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 15:42:57,032 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 287 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:57,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 152 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1361 Invalid, 0 Unknown, 189 Unchecked, 0.4s Time] [2022-01-18 15:42:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2022-01-18 15:42:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1366. [2022-01-18 15:42:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 4.002197802197802) internal successors, (5463), 1365 states have internal predecessors, (5463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 5463 transitions. [2022-01-18 15:42:57,054 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 5463 transitions. Word has length 26 [2022-01-18 15:42:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:57,054 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 5463 transitions. [2022-01-18 15:42:57,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 5463 transitions. [2022-01-18 15:42:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:57,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:57,056 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:57,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:57,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:57,258 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:57,258 INFO L85 PathProgramCache]: Analyzing trace with hash -581146886, now seen corresponding path program 15 times [2022-01-18 15:42:57,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:57,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669266221] [2022-01-18 15:42:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:57,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:57,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:57,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669266221] [2022-01-18 15:42:57,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669266221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:57,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131057685] [2022-01-18 15:42:57,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:57,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:57,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:57,345 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) [2022-01-18 15:42:57,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 15:42:57,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:42:57,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:57,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:57,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:57,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:57,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:57,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:57,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:57,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:42:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:57,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131057685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:57,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:57,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:42:57,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127586913] [2022-01-18 15:42:57,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:57,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:57,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:57,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:57,813 INFO L87 Difference]: Start difference. First operand 1366 states and 5463 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:59,298 INFO L93 Difference]: Finished difference Result 2460 states and 9545 transitions. [2022-01-18 15:42:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:42:59,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:42:59,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:59,303 INFO L225 Difference]: With dead ends: 2460 [2022-01-18 15:42:59,303 INFO L226 Difference]: Without dead ends: 2379 [2022-01-18 15:42:59,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=450, Invalid=2000, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:42:59,304 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 335 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:59,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 140 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1619 Invalid, 0 Unknown, 357 Unchecked, 0.6s Time] [2022-01-18 15:42:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2022-01-18 15:42:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1357. [2022-01-18 15:42:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 4.0007374631268435) internal successors, (5425), 1356 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 5425 transitions. [2022-01-18 15:42:59,324 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 5425 transitions. Word has length 26 [2022-01-18 15:42:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:59,324 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 5425 transitions. [2022-01-18 15:42:59,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 5425 transitions. [2022-01-18 15:42:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:42:59,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:59,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:59,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 15:42:59,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:59,529 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:42:59,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:59,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1764578344, now seen corresponding path program 16 times [2022-01-18 15:42:59,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:59,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229780086] [2022-01-18 15:42:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:59,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:59,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229780086] [2022-01-18 15:42:59,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229780086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162229246] [2022-01-18 15:42:59,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:59,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:59,597 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) [2022-01-18 15:42:59,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 15:42:59,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:59,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:59,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:59,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:59,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:59,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:42:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:59,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:59,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:59,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:42:59,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:42:59,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:42:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:59,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162229246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:59,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:59,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:42:59,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263155607] [2022-01-18 15:42:59,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:59,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:42:59,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:59,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:42:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:42:59,945 INFO L87 Difference]: Start difference. First operand 1357 states and 5425 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:00,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:00,163 INFO L93 Difference]: Finished difference Result 1730 states and 6842 transitions. [2022-01-18 15:43:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:43:00,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:00,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:00,167 INFO L225 Difference]: With dead ends: 1730 [2022-01-18 15:43:00,167 INFO L226 Difference]: Without dead ends: 1677 [2022-01-18 15:43:00,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:00,167 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:00,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 72 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 621 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-01-18 15:43:00,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-01-18 15:43:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1349. [2022-01-18 15:43:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.999258160237389) internal successors, (5391), 1348 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 5391 transitions. [2022-01-18 15:43:00,185 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 5391 transitions. Word has length 26 [2022-01-18 15:43:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:00,185 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 5391 transitions. [2022-01-18 15:43:00,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 5391 transitions. [2022-01-18 15:43:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:00,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:00,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:00,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 15:43:00,391 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,SelfDestructingSolverStorable74 [2022-01-18 15:43:00,391 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:00,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2142950437, now seen corresponding path program 14 times [2022-01-18 15:43:00,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:00,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141718959] [2022-01-18 15:43:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:00,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:00,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:00,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141718959] [2022-01-18 15:43:00,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141718959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:00,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946562839] [2022-01-18 15:43:00,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:00,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:00,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:00,488 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) [2022-01-18 15:43:00,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 15:43:00,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:00,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:00,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:00,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:00,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:00,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:43:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:00,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:00,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:00,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:43:00,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:00,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:43:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:00,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946562839] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:00,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:00,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:43:00,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546895983] [2022-01-18 15:43:00,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:00,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:43:00,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:00,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:43:00,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:43:00,854 INFO L87 Difference]: Start difference. First operand 1349 states and 5391 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:01,252 INFO L93 Difference]: Finished difference Result 1921 states and 7579 transitions. [2022-01-18 15:43:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:01,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:01,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:01,256 INFO L225 Difference]: With dead ends: 1921 [2022-01-18 15:43:01,256 INFO L226 Difference]: Without dead ends: 1849 [2022-01-18 15:43:01,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:01,257 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:01,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 91 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 757 Invalid, 0 Unknown, 232 Unchecked, 0.3s Time] [2022-01-18 15:43:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2022-01-18 15:43:01,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1335. [2022-01-18 15:43:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 4.001499250374812) internal successors, (5338), 1334 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 5338 transitions. [2022-01-18 15:43:01,277 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 5338 transitions. Word has length 26 [2022-01-18 15:43:01,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:01,277 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 5338 transitions. [2022-01-18 15:43:01,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:01,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 5338 transitions. [2022-01-18 15:43:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:01,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:01,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:01,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:01,497 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,SelfDestructingSolverStorable75 [2022-01-18 15:43:01,498 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1881958770, now seen corresponding path program 17 times [2022-01-18 15:43:01,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:01,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216696586] [2022-01-18 15:43:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:01,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:01,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:01,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216696586] [2022-01-18 15:43:01,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216696586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:01,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484019350] [2022-01-18 15:43:01,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:01,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:01,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:01,611 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) [2022-01-18 15:43:01,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 15:43:01,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:01,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:01,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:01,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:01,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:01,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 15:43:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:01,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:02,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:02,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:02,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:02,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484019350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:02,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:02,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 15:43:02,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358910205] [2022-01-18 15:43:02,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:02,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:02,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:02,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:02,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:02,071 INFO L87 Difference]: Start difference. First operand 1335 states and 5338 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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) [2022-01-18 15:43:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:02,453 INFO L93 Difference]: Finished difference Result 1802 states and 7130 transitions. [2022-01-18 15:43:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:02,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 26 [2022-01-18 15:43:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:02,457 INFO L225 Difference]: With dead ends: 1802 [2022-01-18 15:43:02,457 INFO L226 Difference]: Without dead ends: 1721 [2022-01-18 15:43:02,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:02,458 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:02,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 76 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-01-18 15:43:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1374. [2022-01-18 15:43:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.98761835396941) internal successors, (5475), 1373 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 5475 transitions. [2022-01-18 15:43:02,479 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 5475 transitions. Word has length 26 [2022-01-18 15:43:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:02,479 INFO L470 AbstractCegarLoop]: Abstraction has 1374 states and 5475 transitions. [2022-01-18 15:43:02,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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) [2022-01-18 15:43:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 5475 transitions. [2022-01-18 15:43:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:02,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:02,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:02,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:02,696 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,SelfDestructingSolverStorable76 [2022-01-18 15:43:02,697 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:02,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1993482833, now seen corresponding path program 15 times [2022-01-18 15:43:02,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:02,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56442366] [2022-01-18 15:43:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:02,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:02,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:02,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56442366] [2022-01-18 15:43:02,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56442366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:02,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728016084] [2022-01-18 15:43:02,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:02,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:02,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:02,777 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) [2022-01-18 15:43:02,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 15:43:02,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:43:02,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:02,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:02,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:02,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:02,957 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 11 treesize of output 15 [2022-01-18 15:43:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:03,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:03,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:03,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:03,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728016084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:03,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:03,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-18 15:43:03,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001381974] [2022-01-18 15:43:03,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:03,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:43:03,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:03,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:43:03,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:03,381 INFO L87 Difference]: Start difference. First operand 1374 states and 5475 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:04,378 INFO L93 Difference]: Finished difference Result 2384 states and 9235 transitions. [2022-01-18 15:43:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:43:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:04,382 INFO L225 Difference]: With dead ends: 2384 [2022-01-18 15:43:04,382 INFO L226 Difference]: Without dead ends: 2149 [2022-01-18 15:43:04,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1312, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:43:04,383 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 429 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:04,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 116 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1158 Invalid, 0 Unknown, 513 Unchecked, 0.5s Time] [2022-01-18 15:43:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2022-01-18 15:43:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1380. [2022-01-18 15:43:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.9992748368382887) internal successors, (5515), 1379 states have internal predecessors, (5515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5515 transitions. [2022-01-18 15:43:04,402 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5515 transitions. Word has length 26 [2022-01-18 15:43:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:04,402 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 5515 transitions. [2022-01-18 15:43:04,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5515 transitions. [2022-01-18 15:43:04,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:04,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:04,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:04,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:04,620 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,SelfDestructingSolverStorable77 [2022-01-18 15:43:04,620 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1223631284, now seen corresponding path program 18 times [2022-01-18 15:43:04,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:04,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62356778] [2022-01-18 15:43:04,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:04,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:04,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:04,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62356778] [2022-01-18 15:43:04,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62356778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:04,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515294905] [2022-01-18 15:43:04,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:04,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:04,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:04,690 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) [2022-01-18 15:43:04,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 15:43:04,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:04,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:04,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:04,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:04,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:04,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:05,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:05,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:05,145 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 28 treesize of output 27 [2022-01-18 15:43:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:05,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515294905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:05,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:05,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:43:05,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964441862] [2022-01-18 15:43:05,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:05,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:05,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:05,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:05,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:05,238 INFO L87 Difference]: Start difference. First operand 1380 states and 5515 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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) [2022-01-18 15:43:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:08,041 INFO L93 Difference]: Finished difference Result 3987 states and 15084 transitions. [2022-01-18 15:43:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 15:43:08,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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 26 [2022-01-18 15:43:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:08,048 INFO L225 Difference]: With dead ends: 3987 [2022-01-18 15:43:08,049 INFO L226 Difference]: Without dead ends: 3726 [2022-01-18 15:43:08,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1096, Invalid=5224, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 15:43:08,049 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 710 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:08,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 211 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 15:43:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2022-01-18 15:43:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 1410. [2022-01-18 15:43:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 4.0134847409510295) internal successors, (5655), 1409 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 5655 transitions. [2022-01-18 15:43:08,078 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 5655 transitions. Word has length 26 [2022-01-18 15:43:08,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:08,078 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 5655 transitions. [2022-01-18 15:43:08,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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) [2022-01-18 15:43:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 5655 transitions. [2022-01-18 15:43:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:08,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:08,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:08,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:08,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:08,295 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:08,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1887904554, now seen corresponding path program 19 times [2022-01-18 15:43:08,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:08,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884622906] [2022-01-18 15:43:08,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:08,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:08,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:08,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884622906] [2022-01-18 15:43:08,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884622906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:08,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030806498] [2022-01-18 15:43:08,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:08,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:08,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:08,352 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) [2022-01-18 15:43:08,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 15:43:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:08,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:08,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:08,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:08,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:08,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:08,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:08,579 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 15 treesize of output 20 [2022-01-18 15:43:08,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:08,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:08,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030806498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:08,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:08,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:43:08,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200290435] [2022-01-18 15:43:08,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:08,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:08,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:08,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:08,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:08,605 INFO L87 Difference]: Start difference. First operand 1410 states and 5655 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:08,908 INFO L93 Difference]: Finished difference Result 1817 states and 7222 transitions. [2022-01-18 15:43:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:08,909 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:08,912 INFO L225 Difference]: With dead ends: 1817 [2022-01-18 15:43:08,912 INFO L226 Difference]: Without dead ends: 1734 [2022-01-18 15:43:08,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:08,912 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:08,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 71 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2022-01-18 15:43:08,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1410. [2022-01-18 15:43:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 4.01277501774308) internal successors, (5654), 1409 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 5654 transitions. [2022-01-18 15:43:08,930 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 5654 transitions. Word has length 26 [2022-01-18 15:43:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:08,930 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 5654 transitions. [2022-01-18 15:43:08,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 5654 transitions. [2022-01-18 15:43:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:08,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:08,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:08,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 15:43:09,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:09,135 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:09,135 INFO L85 PathProgramCache]: Analyzing trace with hash -430251061, now seen corresponding path program 16 times [2022-01-18 15:43:09,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:09,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862299371] [2022-01-18 15:43:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:09,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:09,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:09,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862299371] [2022-01-18 15:43:09,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862299371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:09,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375172299] [2022-01-18 15:43:09,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:09,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:09,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:09,195 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) [2022-01-18 15:43:09,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 15:43:09,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:09,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:09,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:09,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:09,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:09,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:43:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:09,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:09,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:09,439 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 15 treesize of output 20 [2022-01-18 15:43:09,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:09,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:09,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375172299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:09,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:09,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:43:09,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738164773] [2022-01-18 15:43:09,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:09,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:09,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:09,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:09,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:09,472 INFO L87 Difference]: Start difference. First operand 1410 states and 5654 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 15:43:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:09,786 INFO L93 Difference]: Finished difference Result 1867 states and 7390 transitions. [2022-01-18 15:43:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:09,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 26 [2022-01-18 15:43:09,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:09,789 INFO L225 Difference]: With dead ends: 1867 [2022-01-18 15:43:09,789 INFO L226 Difference]: Without dead ends: 1785 [2022-01-18 15:43:09,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:09,790 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 97 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:09,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 54 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-01-18 15:43:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1412. [2022-01-18 15:43:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 4.005669737774628) internal successors, (5652), 1411 states have internal predecessors, (5652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 5652 transitions. [2022-01-18 15:43:09,808 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 5652 transitions. Word has length 26 [2022-01-18 15:43:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:09,808 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 5652 transitions. [2022-01-18 15:43:09,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 15:43:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 5652 transitions. [2022-01-18 15:43:09,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:09,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:09,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:09,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:10,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:10,013 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1050102391, now seen corresponding path program 17 times [2022-01-18 15:43:10,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:10,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403090504] [2022-01-18 15:43:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:10,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:10,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:10,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403090504] [2022-01-18 15:43:10,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403090504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:10,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513665061] [2022-01-18 15:43:10,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:10,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:10,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:10,111 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) [2022-01-18 15:43:10,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 15:43:10,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:10,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:10,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:10,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:10,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:10,230 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:43:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:10,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:10,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:10,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:10,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:10,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:10,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513665061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:10,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:10,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:43:10,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906756733] [2022-01-18 15:43:10,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:10,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:10,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:10,426 INFO L87 Difference]: Start difference. First operand 1412 states and 5652 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2022-01-18 15:43:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:10,802 INFO L93 Difference]: Finished difference Result 1857 states and 7354 transitions. [2022-01-18 15:43:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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 26 [2022-01-18 15:43:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:10,805 INFO L225 Difference]: With dead ends: 1857 [2022-01-18 15:43:10,805 INFO L226 Difference]: Without dead ends: 1775 [2022-01-18 15:43:10,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:10,806 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:10,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 70 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2022-01-18 15:43:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1409. [2022-01-18 15:43:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 4.0078125) internal successors, (5643), 1408 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 5643 transitions. [2022-01-18 15:43:10,824 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 5643 transitions. Word has length 26 [2022-01-18 15:43:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:10,824 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 5643 transitions. [2022-01-18 15:43:10,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2022-01-18 15:43:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 5643 transitions. [2022-01-18 15:43:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:10,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:10,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:10,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:11,039 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,SelfDestructingSolverStorable81 [2022-01-18 15:43:11,040 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:11,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:11,040 INFO L85 PathProgramCache]: Analyzing trace with hash -460668474, now seen corresponding path program 12 times [2022-01-18 15:43:11,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:11,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109754669] [2022-01-18 15:43:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:11,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:11,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:11,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109754669] [2022-01-18 15:43:11,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109754669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:11,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32897611] [2022-01-18 15:43:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:11,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:11,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:11,108 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) [2022-01-18 15:43:11,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 15:43:11,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:11,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:11,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:11,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:11,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:11,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:11,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:11,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:11,450 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:43:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:11,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32897611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:11,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:11,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:43:11,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017672641] [2022-01-18 15:43:11,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:11,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:11,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:11,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:11,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:11,517 INFO L87 Difference]: Start difference. First operand 1409 states and 5643 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:14,736 INFO L93 Difference]: Finished difference Result 3924 states and 15014 transitions. [2022-01-18 15:43:14,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 15:43:14,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:14,743 INFO L225 Difference]: With dead ends: 3924 [2022-01-18 15:43:14,743 INFO L226 Difference]: Without dead ends: 3639 [2022-01-18 15:43:14,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1096, Invalid=5224, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 15:43:14,744 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 653 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:14,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 235 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2558 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 15:43:14,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2022-01-18 15:43:14,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 1448. [2022-01-18 15:43:14,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 4.025570145127851) internal successors, (5825), 1447 states have internal predecessors, (5825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5825 transitions. [2022-01-18 15:43:14,770 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5825 transitions. Word has length 26 [2022-01-18 15:43:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:14,770 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 5825 transitions. [2022-01-18 15:43:14,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5825 transitions. [2022-01-18 15:43:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:14,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:14,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:14,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:14,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:14,985 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:14,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:14,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1446374976, now seen corresponding path program 13 times [2022-01-18 15:43:14,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:14,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658517607] [2022-01-18 15:43:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:14,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:15,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:15,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658517607] [2022-01-18 15:43:15,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658517607] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:15,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443324867] [2022-01-18 15:43:15,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:15,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:15,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:15,069 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) [2022-01-18 15:43:15,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 15:43:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:15,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:15,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:15,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:43:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:15,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:15,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:15,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:15,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:15,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:15,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443324867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:15,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:15,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:43:15,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611682813] [2022-01-18 15:43:15,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:15,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:15,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:15,424 INFO L87 Difference]: Start difference. First operand 1448 states and 5825 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:15,744 INFO L93 Difference]: Finished difference Result 1803 states and 7191 transitions. [2022-01-18 15:43:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:15,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:15,747 INFO L225 Difference]: With dead ends: 1803 [2022-01-18 15:43:15,747 INFO L226 Difference]: Without dead ends: 1728 [2022-01-18 15:43:15,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:15,748 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:15,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 54 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2022-01-18 15:43:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1448. [2022-01-18 15:43:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 4.02418797512094) internal successors, (5823), 1447 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5823 transitions. [2022-01-18 15:43:15,766 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5823 transitions. Word has length 26 [2022-01-18 15:43:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:15,766 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 5823 transitions. [2022-01-18 15:43:15,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5823 transitions. [2022-01-18 15:43:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:15,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:15,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:15,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 15:43:15,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:15,969 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1959096217, now seen corresponding path program 11 times [2022-01-18 15:43:15,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:15,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206657065] [2022-01-18 15:43:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:15,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:16,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206657065] [2022-01-18 15:43:16,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206657065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009423223] [2022-01-18 15:43:16,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:16,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:16,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:16,063 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) [2022-01-18 15:43:16,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 15:43:16,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:43:16,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:16,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:16,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:16,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:16,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:16,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:16,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:16,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:16,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:16,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:16,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009423223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:16,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:16,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:43:16,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778826787] [2022-01-18 15:43:16,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:16,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:43:16,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:43:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:43:16,422 INFO L87 Difference]: Start difference. First operand 1448 states and 5823 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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) [2022-01-18 15:43:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:16,937 INFO L93 Difference]: Finished difference Result 1964 states and 7842 transitions. [2022-01-18 15:43:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:43:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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 26 [2022-01-18 15:43:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:16,941 INFO L225 Difference]: With dead ends: 1964 [2022-01-18 15:43:16,941 INFO L226 Difference]: Without dead ends: 1864 [2022-01-18 15:43:16,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:16,941 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 177 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:16,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 83 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:43:16,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-01-18 15:43:16,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1450. [2022-01-18 15:43:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 4.024154589371981) internal successors, (5831), 1449 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 5831 transitions. [2022-01-18 15:43:16,962 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 5831 transitions. Word has length 26 [2022-01-18 15:43:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:16,962 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 5831 transitions. [2022-01-18 15:43:16,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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) [2022-01-18 15:43:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 5831 transitions. [2022-01-18 15:43:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:16,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:16,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:16,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:17,166 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,SelfDestructingSolverStorable84 [2022-01-18 15:43:17,166 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:17,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:17,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1550767769, now seen corresponding path program 12 times [2022-01-18 15:43:17,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:17,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429924663] [2022-01-18 15:43:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:17,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:43:17,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:17,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429924663] [2022-01-18 15:43:17,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429924663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:17,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017634732] [2022-01-18 15:43:17,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:17,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:17,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:17,265 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) [2022-01-18 15:43:17,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 15:43:17,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:43:17,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:17,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:43:17,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:17,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:17,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:17,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:17,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:17,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:17,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017634732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:17,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:17,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 15:43:17,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730814389] [2022-01-18 15:43:17,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:17,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:43:17,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:43:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:43:17,930 INFO L87 Difference]: Start difference. First operand 1450 states and 5831 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:20,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:20,180 INFO L93 Difference]: Finished difference Result 4754 states and 17329 transitions. [2022-01-18 15:43:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 15:43:20,181 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:20,190 INFO L225 Difference]: With dead ends: 4754 [2022-01-18 15:43:20,191 INFO L226 Difference]: Without dead ends: 3945 [2022-01-18 15:43:20,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1050, Invalid=3506, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 15:43:20,191 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 930 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:20,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 236 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1984 Invalid, 0 Unknown, 616 Unchecked, 0.7s Time] [2022-01-18 15:43:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2022-01-18 15:43:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 1475. [2022-01-18 15:43:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 4.049525101763908) internal successors, (5969), 1474 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 5969 transitions. [2022-01-18 15:43:20,229 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 5969 transitions. Word has length 26 [2022-01-18 15:43:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:20,229 INFO L470 AbstractCegarLoop]: Abstraction has 1475 states and 5969 transitions. [2022-01-18 15:43:20,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 5969 transitions. [2022-01-18 15:43:20,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:20,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:20,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:20,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:20,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:20,433 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:20,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1084817546, now seen corresponding path program 14 times [2022-01-18 15:43:20,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:20,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237848488] [2022-01-18 15:43:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:20,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:20,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:20,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237848488] [2022-01-18 15:43:20,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237848488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:20,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891933876] [2022-01-18 15:43:20,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:20,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:20,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:20,514 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) [2022-01-18 15:43:20,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 15:43:20,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:20,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:20,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:43:20,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:20,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:20,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:20,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:21,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:21,053 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 24 treesize of output 25 [2022-01-18 15:43:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:21,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891933876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:21,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:21,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 15:43:21,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163936410] [2022-01-18 15:43:21,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:21,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:43:21,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:21,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:43:21,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:43:21,182 INFO L87 Difference]: Start difference. First operand 1475 states and 5969 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:22,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:22,811 INFO L93 Difference]: Finished difference Result 2575 states and 9779 transitions. [2022-01-18 15:43:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 15:43:22,812 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:22,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:22,816 INFO L225 Difference]: With dead ends: 2575 [2022-01-18 15:43:22,816 INFO L226 Difference]: Without dead ends: 2312 [2022-01-18 15:43:22,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:43:22,816 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 541 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 521 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:22,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 195 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1876 Invalid, 0 Unknown, 521 Unchecked, 0.8s Time] [2022-01-18 15:43:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2022-01-18 15:43:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1519. [2022-01-18 15:43:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 4.036231884057971) internal successors, (6127), 1518 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 6127 transitions. [2022-01-18 15:43:22,838 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 6127 transitions. Word has length 26 [2022-01-18 15:43:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:22,838 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 6127 transitions. [2022-01-18 15:43:22,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 6127 transitions. [2022-01-18 15:43:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:22,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:22,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:22,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:23,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:23,050 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:23,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:23,050 INFO L85 PathProgramCache]: Analyzing trace with hash -491622809, now seen corresponding path program 13 times [2022-01-18 15:43:23,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:23,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685806035] [2022-01-18 15:43:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:23,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:23,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:23,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685806035] [2022-01-18 15:43:23,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685806035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:23,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129652539] [2022-01-18 15:43:23,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:23,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:23,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:23,146 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) [2022-01-18 15:43:23,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 15:43:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:23,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:23,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:23,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:23,289 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:43:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:23,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:23,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:23,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:23,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:23,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:23,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129652539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:23,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:23,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 15:43:23,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313688884] [2022-01-18 15:43:23,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:23,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:23,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:23,394 INFO L87 Difference]: Start difference. First operand 1519 states and 6127 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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) [2022-01-18 15:43:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:23,671 INFO L93 Difference]: Finished difference Result 1915 states and 7637 transitions. [2022-01-18 15:43:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:23,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 26 [2022-01-18 15:43:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:23,675 INFO L225 Difference]: With dead ends: 1915 [2022-01-18 15:43:23,675 INFO L226 Difference]: Without dead ends: 1844 [2022-01-18 15:43:23,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:23,691 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:23,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 71 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-01-18 15:43:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1498. [2022-01-18 15:43:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 4.049432197728791) internal successors, (6062), 1497 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 6062 transitions. [2022-01-18 15:43:23,713 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 6062 transitions. Word has length 26 [2022-01-18 15:43:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:23,714 INFO L470 AbstractCegarLoop]: Abstraction has 1498 states and 6062 transitions. [2022-01-18 15:43:23,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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) [2022-01-18 15:43:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 6062 transitions. [2022-01-18 15:43:23,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:23,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:23,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:23,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 15:43:23,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:23,932 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash -417278214, now seen corresponding path program 20 times [2022-01-18 15:43:23,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:23,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077752307] [2022-01-18 15:43:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:23,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:24,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077752307] [2022-01-18 15:43:24,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077752307] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541841813] [2022-01-18 15:43:24,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:24,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:24,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:24,001 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) [2022-01-18 15:43:24,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 15:43:24,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:24,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:24,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:24,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:24,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:24,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:24,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:24,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:24,422 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 28 treesize of output 27 [2022-01-18 15:43:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:24,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541841813] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:24,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:24,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:43:24,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781156507] [2022-01-18 15:43:24,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:24,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:24,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:24,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:24,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:24,512 INFO L87 Difference]: Start difference. First operand 1498 states and 6062 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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) [2022-01-18 15:43:25,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:25,696 INFO L93 Difference]: Finished difference Result 2891 states and 11195 transitions. [2022-01-18 15:43:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:43:25,697 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 26 [2022-01-18 15:43:25,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:25,702 INFO L225 Difference]: With dead ends: 2891 [2022-01-18 15:43:25,702 INFO L226 Difference]: Without dead ends: 2607 [2022-01-18 15:43:25,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:43:25,702 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 341 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 757 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:25,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 146 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1364 Invalid, 0 Unknown, 757 Unchecked, 0.6s Time] [2022-01-18 15:43:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2022-01-18 15:43:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1536. [2022-01-18 15:43:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 4.037785016286645) internal successors, (6198), 1535 states have internal predecessors, (6198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 6198 transitions. [2022-01-18 15:43:25,739 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 6198 transitions. Word has length 26 [2022-01-18 15:43:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:25,739 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 6198 transitions. [2022-01-18 15:43:25,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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) [2022-01-18 15:43:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 6198 transitions. [2022-01-18 15:43:25,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:25,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:25,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:25,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:25,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-01-18 15:43:25,949 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:25,950 INFO L85 PathProgramCache]: Analyzing trace with hash -232284556, now seen corresponding path program 15 times [2022-01-18 15:43:25,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:25,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313649244] [2022-01-18 15:43:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:25,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:26,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:26,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313649244] [2022-01-18 15:43:26,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313649244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3265754] [2022-01-18 15:43:26,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:26,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:26,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:26,029 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) [2022-01-18 15:43:26,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 15:43:26,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:43:26,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:26,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:26,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:26,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:26,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:26,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:26,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:26,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:43:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:26,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3265754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:26,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:26,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:43:26,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740978298] [2022-01-18 15:43:26,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:26,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:26,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:26,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:26,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:26,625 INFO L87 Difference]: Start difference. First operand 1536 states and 6198 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:27,533 INFO L93 Difference]: Finished difference Result 2792 states and 10852 transitions. [2022-01-18 15:43:27,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:43:27,533 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:27,538 INFO L225 Difference]: With dead ends: 2792 [2022-01-18 15:43:27,538 INFO L226 Difference]: Without dead ends: 2564 [2022-01-18 15:43:27,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:43:27,538 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 291 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 806 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:27,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 178 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1025 Invalid, 0 Unknown, 806 Unchecked, 0.3s Time] [2022-01-18 15:43:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-01-18 15:43:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1555. [2022-01-18 15:43:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 4.045045045045045) internal successors, (6286), 1554 states have internal predecessors, (6286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 6286 transitions. [2022-01-18 15:43:27,562 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 6286 transitions. Word has length 26 [2022-01-18 15:43:27,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:27,562 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 6286 transitions. [2022-01-18 15:43:27,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:27,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 6286 transitions. [2022-01-18 15:43:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:27,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:27,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:27,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:27,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 15:43:27,779 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:27,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:27,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1531659794, now seen corresponding path program 16 times [2022-01-18 15:43:27,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:27,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477177653] [2022-01-18 15:43:27,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:27,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:27,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:27,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477177653] [2022-01-18 15:43:27,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477177653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:27,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142679612] [2022-01-18 15:43:27,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:27,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:27,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:27,842 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) [2022-01-18 15:43:27,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 15:43:27,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:27,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:27,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:27,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:27,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:27,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:28,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:28,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:28,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:28,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:28,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:28,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142679612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:28,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:28,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 15:43:28,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893135429] [2022-01-18 15:43:28,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:28,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:28,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:28,106 INFO L87 Difference]: Start difference. First operand 1555 states and 6286 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:28,352 INFO L93 Difference]: Finished difference Result 1944 states and 7785 transitions. [2022-01-18 15:43:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:43:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:28,356 INFO L225 Difference]: With dead ends: 1944 [2022-01-18 15:43:28,356 INFO L226 Difference]: Without dead ends: 1898 [2022-01-18 15:43:28,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:28,356 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:28,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 75 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 757 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2022-01-18 15:43:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2022-01-18 15:43:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1550. [2022-01-18 15:43:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 4.058747579083279) internal successors, (6287), 1549 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 6287 transitions. [2022-01-18 15:43:28,376 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 6287 transitions. Word has length 26 [2022-01-18 15:43:28,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:28,376 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 6287 transitions. [2022-01-18 15:43:28,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:28,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 6287 transitions. [2022-01-18 15:43:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:28,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:28,379 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:28,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:28,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:28,591 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:28,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1747380906, now seen corresponding path program 17 times [2022-01-18 15:43:28,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:28,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064243630] [2022-01-18 15:43:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:28,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:28,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:28,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064243630] [2022-01-18 15:43:28,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064243630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:28,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030904537] [2022-01-18 15:43:28,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:28,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:28,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:28,664 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) [2022-01-18 15:43:28,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 15:43:28,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:28,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:28,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:43:28,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:28,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:28,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:43:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:28,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:28,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:28,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:28,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:28,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:28,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030904537] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:28,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:28,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:43:28,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989584977] [2022-01-18 15:43:28,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:28,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:28,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:28,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:28,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:28,948 INFO L87 Difference]: Start difference. First operand 1550 states and 6287 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:29,289 INFO L93 Difference]: Finished difference Result 1961 states and 7854 transitions. [2022-01-18 15:43:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:43:29,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:29,292 INFO L225 Difference]: With dead ends: 1961 [2022-01-18 15:43:29,293 INFO L226 Difference]: Without dead ends: 1896 [2022-01-18 15:43:29,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:29,293 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:29,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 109 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 849 Invalid, 0 Unknown, 161 Unchecked, 0.3s Time] [2022-01-18 15:43:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2022-01-18 15:43:29,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1547. [2022-01-18 15:43:29,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1547 states, 1546 states have (on average 4.059508408796895) internal successors, (6276), 1546 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 6276 transitions. [2022-01-18 15:43:29,313 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 6276 transitions. Word has length 26 [2022-01-18 15:43:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:29,313 INFO L470 AbstractCegarLoop]: Abstraction has 1547 states and 6276 transitions. [2022-01-18 15:43:29,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 6276 transitions. [2022-01-18 15:43:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:29,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:29,316 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:29,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:29,517 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,SelfDestructingSolverStorable91 [2022-01-18 15:43:29,517 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:29,518 INFO L85 PathProgramCache]: Analyzing trace with hash 625666200, now seen corresponding path program 21 times [2022-01-18 15:43:29,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:29,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279898022] [2022-01-18 15:43:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:29,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:29,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279898022] [2022-01-18 15:43:29,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279898022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319811902] [2022-01-18 15:43:29,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:29,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:29,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:29,588 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) [2022-01-18 15:43:29,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 15:43:29,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:43:29,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:29,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:43:29,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:29,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:29,704 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 15 [2022-01-18 15:43:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:29,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:29,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:29,970 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:43:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:30,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319811902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:30,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:30,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 15:43:30,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524806328] [2022-01-18 15:43:30,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:30,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:30,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:30,062 INFO L87 Difference]: Start difference. First operand 1547 states and 6276 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) [2022-01-18 15:43:31,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:31,247 INFO L93 Difference]: Finished difference Result 2986 states and 11630 transitions. [2022-01-18 15:43:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:43:31,247 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 26 [2022-01-18 15:43:31,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:31,252 INFO L225 Difference]: With dead ends: 2986 [2022-01-18 15:43:31,252 INFO L226 Difference]: Without dead ends: 2830 [2022-01-18 15:43:31,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=478, Invalid=1972, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:43:31,252 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 541 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 651 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:31,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 155 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1740 Invalid, 0 Unknown, 651 Unchecked, 0.6s Time] [2022-01-18 15:43:31,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2022-01-18 15:43:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 1547. [2022-01-18 15:43:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1547 states, 1546 states have (on average 4.059508408796895) internal successors, (6276), 1546 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 6276 transitions. [2022-01-18 15:43:31,277 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 6276 transitions. Word has length 26 [2022-01-18 15:43:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:31,277 INFO L470 AbstractCegarLoop]: Abstraction has 1547 states and 6276 transitions. [2022-01-18 15:43:31,277 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) [2022-01-18 15:43:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 6276 transitions. [2022-01-18 15:43:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:31,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:31,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:31,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:31,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:31,495 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:31,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1700970630, now seen corresponding path program 22 times [2022-01-18 15:43:31,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:31,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171738560] [2022-01-18 15:43:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:31,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:31,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171738560] [2022-01-18 15:43:31,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171738560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127142767] [2022-01-18 15:43:31,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:31,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:31,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:31,553 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) [2022-01-18 15:43:31,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 15:43:31,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:31,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:31,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:31,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:31,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:31,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:31,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:31,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:31,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:31,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:31,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:32,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127142767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:32,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:32,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:43:32,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932603591] [2022-01-18 15:43:32,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:32,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:32,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:32,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:32,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:32,011 INFO L87 Difference]: Start difference. First operand 1547 states and 6276 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) [2022-01-18 15:43:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:32,427 INFO L93 Difference]: Finished difference Result 1949 states and 7826 transitions. [2022-01-18 15:43:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:43:32,428 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 26 [2022-01-18 15:43:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:32,431 INFO L225 Difference]: With dead ends: 1949 [2022-01-18 15:43:32,431 INFO L226 Difference]: Without dead ends: 1899 [2022-01-18 15:43:32,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:32,431 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:32,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 75 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 826 Invalid, 0 Unknown, 70 Unchecked, 0.4s Time] [2022-01-18 15:43:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-01-18 15:43:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1613. [2022-01-18 15:43:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 4.0576923076923075) internal successors, (6541), 1612 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 6541 transitions. [2022-01-18 15:43:32,452 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 6541 transitions. Word has length 26 [2022-01-18 15:43:32,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:32,452 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 6541 transitions. [2022-01-18 15:43:32,452 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) [2022-01-18 15:43:32,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 6541 transitions. [2022-01-18 15:43:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:32,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:32,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:32,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:32,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:32,680 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash -813466949, now seen corresponding path program 1 times [2022-01-18 15:43:32,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:32,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679472534] [2022-01-18 15:43:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:32,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:32,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:32,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679472534] [2022-01-18 15:43:32,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679472534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:32,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268142861] [2022-01-18 15:43:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:32,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:32,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:32,765 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) [2022-01-18 15:43:32,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 15:43:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:32,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:32,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:32,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:32,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:43:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:32,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:33,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:33,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:33,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:33,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268142861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:33,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:33,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:43:33,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411948251] [2022-01-18 15:43:33,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:33,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:33,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:33,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:33,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:33,112 INFO L87 Difference]: Start difference. First operand 1613 states and 6541 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) [2022-01-18 15:43:33,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:33,394 INFO L93 Difference]: Finished difference Result 1950 states and 7800 transitions. [2022-01-18 15:43:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:43:33,395 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 26 [2022-01-18 15:43:33,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:33,398 INFO L225 Difference]: With dead ends: 1950 [2022-01-18 15:43:33,398 INFO L226 Difference]: Without dead ends: 1877 [2022-01-18 15:43:33,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:33,398 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:33,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 63 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 674 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-01-18 15:43:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-01-18 15:43:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1553. [2022-01-18 15:43:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1552 states have (on average 4.061855670103093) internal successors, (6304), 1552 states have internal predecessors, (6304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 6304 transitions. [2022-01-18 15:43:33,419 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 6304 transitions. Word has length 26 [2022-01-18 15:43:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:33,419 INFO L470 AbstractCegarLoop]: Abstraction has 1553 states and 6304 transitions. [2022-01-18 15:43:33,419 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) [2022-01-18 15:43:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 6304 transitions. [2022-01-18 15:43:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:33,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:33,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:33,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:33,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:33,624 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:33,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1301697330, now seen corresponding path program 23 times [2022-01-18 15:43:33,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:33,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397596745] [2022-01-18 15:43:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:33,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:33,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:33,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397596745] [2022-01-18 15:43:33,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397596745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:33,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089019690] [2022-01-18 15:43:33,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:33,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:33,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:33,700 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) [2022-01-18 15:43:33,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 15:43:33,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:33,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:33,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 15:43:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:33,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:33,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:33,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:33,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:33,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:34,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:34,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:34,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089019690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:34,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:34,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:43:34,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40905889] [2022-01-18 15:43:34,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:34,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:34,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:34,054 INFO L87 Difference]: Start difference. First operand 1553 states and 6304 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:34,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:34,272 INFO L93 Difference]: Finished difference Result 1925 states and 7717 transitions. [2022-01-18 15:43:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:43:34,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:34,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:34,276 INFO L225 Difference]: With dead ends: 1925 [2022-01-18 15:43:34,276 INFO L226 Difference]: Without dead ends: 1850 [2022-01-18 15:43:34,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:34,277 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:34,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 59 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 662 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:43:34,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2022-01-18 15:43:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1553. [2022-01-18 15:43:34,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1552 states have (on average 4.061855670103093) internal successors, (6304), 1552 states have internal predecessors, (6304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 6304 transitions. [2022-01-18 15:43:34,298 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 6304 transitions. Word has length 26 [2022-01-18 15:43:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:34,298 INFO L470 AbstractCegarLoop]: Abstraction has 1553 states and 6304 transitions. [2022-01-18 15:43:34,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 6304 transitions. [2022-01-18 15:43:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:34,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:34,300 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:34,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:34,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:34,516 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash 556462674, now seen corresponding path program 18 times [2022-01-18 15:43:34,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:34,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211549535] [2022-01-18 15:43:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:34,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:34,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:34,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211549535] [2022-01-18 15:43:34,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211549535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:34,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876789614] [2022-01-18 15:43:34,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:34,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:34,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:34,574 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) [2022-01-18 15:43:34,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 15:43:34,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:43:34,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:34,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:34,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:34,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 15:43:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:34,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:35,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:35,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:43:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:35,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876789614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:35,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:35,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:43:35,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652883102] [2022-01-18 15:43:35,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:35,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:35,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:35,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:35,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:35,174 INFO L87 Difference]: Start difference. First operand 1553 states and 6304 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2022-01-18 15:43:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:35,879 INFO L93 Difference]: Finished difference Result 2391 states and 9389 transitions. [2022-01-18 15:43:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:43:35,879 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 26 [2022-01-18 15:43:35,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:35,883 INFO L225 Difference]: With dead ends: 2391 [2022-01-18 15:43:35,883 INFO L226 Difference]: Without dead ends: 2377 [2022-01-18 15:43:35,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:43:35,883 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 126 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:35,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 148 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 912 Invalid, 0 Unknown, 363 Unchecked, 0.4s Time] [2022-01-18 15:43:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-01-18 15:43:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1620. [2022-01-18 15:43:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 4.041383570105003) internal successors, (6543), 1619 states have internal predecessors, (6543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 6543 transitions. [2022-01-18 15:43:35,907 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 6543 transitions. Word has length 26 [2022-01-18 15:43:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:35,907 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 6543 transitions. [2022-01-18 15:43:35,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2022-01-18 15:43:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 6543 transitions. [2022-01-18 15:43:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:35,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:35,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:35,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:36,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:36,124 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:36,125 INFO L85 PathProgramCache]: Analyzing trace with hash 585091825, now seen corresponding path program 1 times [2022-01-18 15:43:36,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:36,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406406866] [2022-01-18 15:43:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:36,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:36,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406406866] [2022-01-18 15:43:36,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406406866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061571671] [2022-01-18 15:43:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:36,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:36,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:36,208 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) [2022-01-18 15:43:36,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 15:43:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:36,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:36,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:36,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:43:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:36,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:36,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:36,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:36,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:36,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:36,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061571671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:36,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:36,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-18 15:43:36,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729992293] [2022-01-18 15:43:36,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:36,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:36,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:36,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:36,576 INFO L87 Difference]: Start difference. First operand 1620 states and 6543 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 15:43:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:37,009 INFO L93 Difference]: Finished difference Result 2102 states and 8351 transitions. [2022-01-18 15:43:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:37,010 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 26 [2022-01-18 15:43:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:37,013 INFO L225 Difference]: With dead ends: 2102 [2022-01-18 15:43:37,013 INFO L226 Difference]: Without dead ends: 1998 [2022-01-18 15:43:37,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:37,014 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:37,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 100 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1024 Invalid, 0 Unknown, 134 Unchecked, 0.4s Time] [2022-01-18 15:43:37,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-01-18 15:43:37,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1582. [2022-01-18 15:43:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 4.036685641998735) internal successors, (6382), 1581 states have internal predecessors, (6382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:37,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 6382 transitions. [2022-01-18 15:43:37,035 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 6382 transitions. Word has length 26 [2022-01-18 15:43:37,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:37,035 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 6382 transitions. [2022-01-18 15:43:37,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 15:43:37,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 6382 transitions. [2022-01-18 15:43:37,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:37,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:37,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:37,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 15:43:37,253 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,SelfDestructingSolverStorable97 [2022-01-18 15:43:37,253 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:37,253 INFO L85 PathProgramCache]: Analyzing trace with hash -630909232, now seen corresponding path program 24 times [2022-01-18 15:43:37,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:37,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86890848] [2022-01-18 15:43:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:37,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:37,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:37,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86890848] [2022-01-18 15:43:37,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86890848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:37,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203922418] [2022-01-18 15:43:37,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:37,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:37,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:37,335 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) [2022-01-18 15:43:37,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 15:43:37,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:43:37,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:37,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:37,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:37,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:37,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:37,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:37,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:37,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:43:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:37,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203922418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:37,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:37,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:43:37,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555967898] [2022-01-18 15:43:37,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:37,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:37,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:37,787 INFO L87 Difference]: Start difference. First operand 1582 states and 6382 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:39,110 INFO L93 Difference]: Finished difference Result 2691 states and 10517 transitions. [2022-01-18 15:43:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:43:39,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:39,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:39,115 INFO L225 Difference]: With dead ends: 2691 [2022-01-18 15:43:39,115 INFO L226 Difference]: Without dead ends: 2640 [2022-01-18 15:43:39,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:43:39,116 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 328 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:39,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 126 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1142 Invalid, 0 Unknown, 402 Unchecked, 0.5s Time] [2022-01-18 15:43:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2022-01-18 15:43:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1584. [2022-01-18 15:43:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 4.037902716361339) internal successors, (6392), 1583 states have internal predecessors, (6392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 6392 transitions. [2022-01-18 15:43:39,140 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 6392 transitions. Word has length 26 [2022-01-18 15:43:39,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:39,140 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 6392 transitions. [2022-01-18 15:43:39,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:39,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 6392 transitions. [2022-01-18 15:43:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:39,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:39,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:39,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-18 15:43:39,355 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,SelfDestructingSolverStorable98 [2022-01-18 15:43:39,355 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:39,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash 479219380, now seen corresponding path program 19 times [2022-01-18 15:43:39,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:39,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44953074] [2022-01-18 15:43:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:39,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:39,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44953074] [2022-01-18 15:43:39,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44953074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752723982] [2022-01-18 15:43:39,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:39,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:39,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:39,410 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) [2022-01-18 15:43:39,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 15:43:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:39,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:39,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:39,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:39,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:43:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:39,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:39,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:39,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:39,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:39,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:39,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752723982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:39,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:39,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:43:39,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394589987] [2022-01-18 15:43:39,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:39,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:39,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:39,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:39,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:39,705 INFO L87 Difference]: Start difference. First operand 1584 states and 6392 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:39,964 INFO L93 Difference]: Finished difference Result 1939 states and 7762 transitions. [2022-01-18 15:43:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:43:39,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:39,968 INFO L225 Difference]: With dead ends: 1939 [2022-01-18 15:43:39,968 INFO L226 Difference]: Without dead ends: 1866 [2022-01-18 15:43:39,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:39,968 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:39,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 65 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 768 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-01-18 15:43:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2022-01-18 15:43:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1584. [2022-01-18 15:43:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 4.037902716361339) internal successors, (6392), 1583 states have internal predecessors, (6392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 6392 transitions. [2022-01-18 15:43:39,990 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 6392 transitions. Word has length 26 [2022-01-18 15:43:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:39,990 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 6392 transitions. [2022-01-18 15:43:39,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 6392 transitions. [2022-01-18 15:43:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:39,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:39,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:40,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:40,208 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,SelfDestructingSolverStorable99 [2022-01-18 15:43:40,208 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1040689780, now seen corresponding path program 20 times [2022-01-18 15:43:40,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621459584] [2022-01-18 15:43:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:40,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:40,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:40,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621459584] [2022-01-18 15:43:40,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621459584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:40,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073868654] [2022-01-18 15:43:40,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:40,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:40,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:40,270 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) [2022-01-18 15:43:40,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 15:43:40,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:40,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:40,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:40,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:40,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:40,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:40,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:40,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:40,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:40,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073868654] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:40,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:40,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:43:40,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512127175] [2022-01-18 15:43:40,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:40,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:40,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:40,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:40,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:40,726 INFO L87 Difference]: Start difference. First operand 1584 states and 6392 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:42,142 INFO L93 Difference]: Finished difference Result 2536 states and 9961 transitions. [2022-01-18 15:43:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:43:42,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:42,147 INFO L225 Difference]: With dead ends: 2536 [2022-01-18 15:43:42,147 INFO L226 Difference]: Without dead ends: 2468 [2022-01-18 15:43:42,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=398, Invalid=1582, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:43:42,147 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 337 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:42,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 118 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1266 Invalid, 0 Unknown, 418 Unchecked, 0.5s Time] [2022-01-18 15:43:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2022-01-18 15:43:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1591. [2022-01-18 15:43:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 4.041509433962264) internal successors, (6426), 1590 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 6426 transitions. [2022-01-18 15:43:42,172 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 6426 transitions. Word has length 26 [2022-01-18 15:43:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:42,172 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 6426 transitions. [2022-01-18 15:43:42,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 6426 transitions. [2022-01-18 15:43:42,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:42,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:42,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:42,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-18 15:43:42,384 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,SelfDestructingSolverStorable100 [2022-01-18 15:43:42,384 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1871340540, now seen corresponding path program 21 times [2022-01-18 15:43:42,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:42,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775427475] [2022-01-18 15:43:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:42,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:42,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775427475] [2022-01-18 15:43:42,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775427475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933804095] [2022-01-18 15:43:42,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:42,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:42,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:42,467 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) [2022-01-18 15:43:42,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 15:43:42,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:43:42,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:42,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:42,592 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 [2022-01-18 15:43:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:42,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:42,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:42,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:43:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:42,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933804095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:42,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:42,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:43:42,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421681740] [2022-01-18 15:43:42,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:42,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:42,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:42,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:42,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:42,914 INFO L87 Difference]: Start difference. First operand 1591 states and 6426 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:44,163 INFO L93 Difference]: Finished difference Result 2686 states and 10528 transitions. [2022-01-18 15:43:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:43:44,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:44,168 INFO L225 Difference]: With dead ends: 2686 [2022-01-18 15:43:44,168 INFO L226 Difference]: Without dead ends: 2597 [2022-01-18 15:43:44,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=380, Invalid=1512, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:43:44,168 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 334 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 618 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:44,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 146 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1598 Invalid, 0 Unknown, 618 Unchecked, 0.6s Time] [2022-01-18 15:43:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2022-01-18 15:43:44,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 1580. [2022-01-18 15:43:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 4.039898670044332) internal successors, (6379), 1579 states have internal predecessors, (6379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 6379 transitions. [2022-01-18 15:43:44,192 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 6379 transitions. Word has length 26 [2022-01-18 15:43:44,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:44,192 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 6379 transitions. [2022-01-18 15:43:44,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 6379 transitions. [2022-01-18 15:43:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:44,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:44,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:44,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 15:43:44,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:44,410 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1811904697, now seen corresponding path program 18 times [2022-01-18 15:43:44,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:44,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410433345] [2022-01-18 15:43:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:44,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:44,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410433345] [2022-01-18 15:43:44,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410433345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252443525] [2022-01-18 15:43:44,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:44,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:44,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:44,484 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) [2022-01-18 15:43:44,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 15:43:44,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:44,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:44,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:44,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:44,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:44,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:44,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:44,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:44,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:44,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252443525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:44,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:44,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 15:43:44,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488193429] [2022-01-18 15:43:44,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:44,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:43:44,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:44,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:43:44,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:44,845 INFO L87 Difference]: Start difference. First operand 1580 states and 6379 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:45,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:45,859 INFO L93 Difference]: Finished difference Result 3393 states and 12940 transitions. [2022-01-18 15:43:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:43:45,859 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:45,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:45,865 INFO L225 Difference]: With dead ends: 3393 [2022-01-18 15:43:45,865 INFO L226 Difference]: Without dead ends: 3184 [2022-01-18 15:43:45,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:43:45,865 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 443 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:45,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 172 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:43:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2022-01-18 15:43:45,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1649. [2022-01-18 15:43:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 4.044296116504855) internal successors, (6665), 1648 states have internal predecessors, (6665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 6665 transitions. [2022-01-18 15:43:45,893 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 6665 transitions. Word has length 26 [2022-01-18 15:43:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:45,893 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 6665 transitions. [2022-01-18 15:43:45,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 6665 transitions. [2022-01-18 15:43:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:45,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:45,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:45,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:46,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 15:43:46,111 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1996898355, now seen corresponding path program 14 times [2022-01-18 15:43:46,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:46,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711335228] [2022-01-18 15:43:46,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:46,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:46,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:46,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711335228] [2022-01-18 15:43:46,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711335228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:46,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381017736] [2022-01-18 15:43:46,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:46,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:46,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:46,193 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) [2022-01-18 15:43:46,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 15:43:46,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:46,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:46,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:43:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:46,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:46,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:46,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:46,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:46,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-01-18 15:43:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:46,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381017736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:46,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:46,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 15:43:46,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365868255] [2022-01-18 15:43:46,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:46,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:43:46,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:46,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:43:46,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:43:46,877 INFO L87 Difference]: Start difference. First operand 1649 states and 6665 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:48,825 INFO L93 Difference]: Finished difference Result 3373 states and 13035 transitions. [2022-01-18 15:43:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:43:48,826 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:48,831 INFO L225 Difference]: With dead ends: 3373 [2022-01-18 15:43:48,832 INFO L226 Difference]: Without dead ends: 3072 [2022-01-18 15:43:48,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=628, Invalid=2912, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 15:43:48,832 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 593 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1340 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:48,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 220 Invalid, 3333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1832 Invalid, 0 Unknown, 1340 Unchecked, 0.8s Time] [2022-01-18 15:43:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2022-01-18 15:43:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 1635. [2022-01-18 15:43:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 4.05875152998776) internal successors, (6632), 1634 states have internal predecessors, (6632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 6632 transitions. [2022-01-18 15:43:48,858 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 6632 transitions. Word has length 26 [2022-01-18 15:43:48,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:48,858 INFO L470 AbstractCegarLoop]: Abstraction has 1635 states and 6632 transitions. [2022-01-18 15:43:48,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 6632 transitions. [2022-01-18 15:43:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:48,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:48,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:48,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:49,061 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,SelfDestructingSolverStorable103 [2022-01-18 15:43:49,061 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash 520515783, now seen corresponding path program 19 times [2022-01-18 15:43:49,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:49,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065194493] [2022-01-18 15:43:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:49,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:49,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:49,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065194493] [2022-01-18 15:43:49,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065194493] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:49,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332263049] [2022-01-18 15:43:49,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:49,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:49,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:49,133 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) [2022-01-18 15:43:49,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 15:43:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:49,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:49,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:49,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:49,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:49,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:49,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:49,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:49,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:49,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:49,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332263049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:49,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:49,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:43:49,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788333618] [2022-01-18 15:43:49,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:49,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:49,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:49,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:49,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:49,505 INFO L87 Difference]: Start difference. First operand 1635 states and 6632 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:49,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:49,850 INFO L93 Difference]: Finished difference Result 2090 states and 8373 transitions. [2022-01-18 15:43:49,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:43:49,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:49,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:49,853 INFO L225 Difference]: With dead ends: 2090 [2022-01-18 15:43:49,853 INFO L226 Difference]: Without dead ends: 2035 [2022-01-18 15:43:49,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:49,854 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:49,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 75 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 867 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2022-01-18 15:43:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-01-18 15:43:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1665. [2022-01-18 15:43:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 4.058894230769231) internal successors, (6754), 1664 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 6754 transitions. [2022-01-18 15:43:49,875 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 6754 transitions. Word has length 26 [2022-01-18 15:43:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:49,875 INFO L470 AbstractCegarLoop]: Abstraction has 1665 states and 6754 transitions. [2022-01-18 15:43:49,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 6754 transitions. [2022-01-18 15:43:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:49,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:49,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:49,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:50,080 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,SelfDestructingSolverStorable104 [2022-01-18 15:43:50,080 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1091962785, now seen corresponding path program 20 times [2022-01-18 15:43:50,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:50,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153944257] [2022-01-18 15:43:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:50,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:50,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:50,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153944257] [2022-01-18 15:43:50,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153944257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:50,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300603718] [2022-01-18 15:43:50,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:50,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:50,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:50,161 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) [2022-01-18 15:43:50,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 15:43:50,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:50,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:50,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:43:50,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:50,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:50,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:50,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:50,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:50,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-01-18 15:43:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:50,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300603718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:50,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:50,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-01-18 15:43:50,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543008983] [2022-01-18 15:43:50,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:50,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:43:50,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:43:50,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:50,696 INFO L87 Difference]: Start difference. First operand 1665 states and 6754 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:52,305 INFO L93 Difference]: Finished difference Result 2630 states and 10368 transitions. [2022-01-18 15:43:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:43:52,305 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:43:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:52,310 INFO L225 Difference]: With dead ends: 2630 [2022-01-18 15:43:52,310 INFO L226 Difference]: Without dead ends: 2548 [2022-01-18 15:43:52,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=440, Invalid=1630, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:43:52,310 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 476 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:52,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 128 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1848 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:43:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2022-01-18 15:43:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 1664. [2022-01-18 15:43:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 4.055321707757066) internal successors, (6744), 1663 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 6744 transitions. [2022-01-18 15:43:52,336 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 6744 transitions. Word has length 26 [2022-01-18 15:43:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:52,336 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 6744 transitions. [2022-01-18 15:43:52,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 6744 transitions. [2022-01-18 15:43:52,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:43:52,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:52,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:52,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:52,553 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,SelfDestructingSolverStorable105 [2022-01-18 15:43:52,554 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:43:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:52,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1949074037, now seen corresponding path program 15 times [2022-01-18 15:43:52,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:52,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140399555] [2022-01-18 15:43:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:52,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:52,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:52,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140399555] [2022-01-18 15:43:52,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140399555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:52,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726708118] [2022-01-18 15:43:52,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:52,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:52,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:52,620 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) [2022-01-18 15:43:52,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 15:43:52,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:43:52,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:52,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:43:52,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:52,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:52,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:52,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:53,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:53,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:43:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:53,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726708118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:53,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:53,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 15:43:53,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555853856] [2022-01-18 15:43:53,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:53,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:43:53,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:53,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:43:53,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:43:53,113 INFO L87 Difference]: Start difference. First operand 1664 states and 6744 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:00,512 INFO L93 Difference]: Finished difference Result 6790 states and 24964 transitions. [2022-01-18 15:44:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-18 15:44:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:00,523 INFO L225 Difference]: With dead ends: 6790 [2022-01-18 15:44:00,523 INFO L226 Difference]: Without dead ends: 5777 [2022-01-18 15:44:00,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7943 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3171, Invalid=17135, Unknown=0, NotChecked=0, Total=20306 [2022-01-18 15:44:00,524 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1215 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 4380 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 6125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 4380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1320 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:00,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 556 Invalid, 6125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 4380 Invalid, 0 Unknown, 1320 Unchecked, 2.0s Time] [2022-01-18 15:44:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2022-01-18 15:44:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 1845. [2022-01-18 15:44:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 4.085140997830803) internal successors, (7533), 1844 states have internal predecessors, (7533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 7533 transitions. [2022-01-18 15:44:00,568 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 7533 transitions. Word has length 26 [2022-01-18 15:44:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:00,568 INFO L470 AbstractCegarLoop]: Abstraction has 1845 states and 7533 transitions. [2022-01-18 15:44:00,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 7533 transitions. [2022-01-18 15:44:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:00,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:00,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:00,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:00,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:00,786 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash -183045505, now seen corresponding path program 16 times [2022-01-18 15:44:00,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:00,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412984797] [2022-01-18 15:44:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:00,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:00,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:00,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412984797] [2022-01-18 15:44:00,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412984797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:00,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091026852] [2022-01-18 15:44:00,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:00,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:00,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:00,883 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) [2022-01-18 15:44:00,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 15:44:00,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:00,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:00,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:00,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:01,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:01,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:44:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:01,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:01,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:01,200 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 15 treesize of output 20 [2022-01-18 15:44:01,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:01,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 5 [2022-01-18 15:44:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:01,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091026852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:01,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:01,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:01,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098082729] [2022-01-18 15:44:01,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:01,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:01,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:01,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:01,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:01,241 INFO L87 Difference]: Start difference. First operand 1845 states and 7533 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2022-01-18 15:44:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:01,633 INFO L93 Difference]: Finished difference Result 2331 states and 9391 transitions. [2022-01-18 15:44:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:44:01,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 26 [2022-01-18 15:44:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:01,638 INFO L225 Difference]: With dead ends: 2331 [2022-01-18 15:44:01,638 INFO L226 Difference]: Without dead ends: 2251 [2022-01-18 15:44:01,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:01,638 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 151 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:01,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 83 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 992 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-01-18 15:44:01,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2022-01-18 15:44:01,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1853. [2022-01-18 15:44:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 4.091792656587473) internal successors, (7578), 1852 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 7578 transitions. [2022-01-18 15:44:01,663 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 7578 transitions. Word has length 26 [2022-01-18 15:44:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:01,663 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 7578 transitions. [2022-01-18 15:44:01,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2022-01-18 15:44:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 7578 transitions. [2022-01-18 15:44:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:01,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:01,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:01,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:01,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-01-18 15:44:01,881 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:01,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1487285999, now seen corresponding path program 21 times [2022-01-18 15:44:01,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:01,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204890178] [2022-01-18 15:44:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:01,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:01,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:01,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204890178] [2022-01-18 15:44:01,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204890178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:01,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20741610] [2022-01-18 15:44:01,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:01,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:01,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:01,968 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) [2022-01-18 15:44:01,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 15:44:02,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:44:02,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:02,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:44:02,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:02,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:02,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:02,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:02,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:02,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:02,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20741610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:02,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:02,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-01-18 15:44:02,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631169338] [2022-01-18 15:44:02,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:02,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:44:02,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:44:02,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:44:02,647 INFO L87 Difference]: Start difference. First operand 1853 states and 7578 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:07,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:07,476 INFO L93 Difference]: Finished difference Result 5428 states and 19974 transitions. [2022-01-18 15:44:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-18 15:44:07,476 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:07,486 INFO L225 Difference]: With dead ends: 5428 [2022-01-18 15:44:07,486 INFO L226 Difference]: Without dead ends: 4843 [2022-01-18 15:44:07,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5771 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2808, Invalid=12198, Unknown=0, NotChecked=0, Total=15006 [2022-01-18 15:44:07,487 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1355 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 3277 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 4153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 3277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:07,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 296 Invalid, 4153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 3277 Invalid, 0 Unknown, 410 Unchecked, 1.4s Time] [2022-01-18 15:44:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4843 states. [2022-01-18 15:44:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4843 to 1902. [2022-01-18 15:44:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 4.085218306154656) internal successors, (7766), 1901 states have internal predecessors, (7766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 7766 transitions. [2022-01-18 15:44:07,542 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 7766 transitions. Word has length 26 [2022-01-18 15:44:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:07,542 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 7766 transitions. [2022-01-18 15:44:07,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 7766 transitions. [2022-01-18 15:44:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:07,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:07,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:07,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 15:44:07,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:07,761 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:07,761 INFO L85 PathProgramCache]: Analyzing trace with hash -760425878, now seen corresponding path program 25 times [2022-01-18 15:44:07,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:07,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242322535] [2022-01-18 15:44:07,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:07,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:07,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:07,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242322535] [2022-01-18 15:44:07,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242322535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:07,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190056821] [2022-01-18 15:44:07,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:07,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:07,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:07,831 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) [2022-01-18 15:44:07,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 15:44:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:07,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:07,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:07,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:07,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:44:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:08,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:08,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:08,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:08,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:44:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:08,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190056821] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:08,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:08,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:44:08,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435769835] [2022-01-18 15:44:08,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:08,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:44:08,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:08,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:44:08,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:44:08,129 INFO L87 Difference]: Start difference. First operand 1902 states and 7766 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 15:44:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:08,311 INFO L93 Difference]: Finished difference Result 2308 states and 9310 transitions. [2022-01-18 15:44:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:44:08,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 26 [2022-01-18 15:44:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:08,315 INFO L225 Difference]: With dead ends: 2308 [2022-01-18 15:44:08,315 INFO L226 Difference]: Without dead ends: 2232 [2022-01-18 15:44:08,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:44:08,315 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 93 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:08,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 49 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 534 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-01-18 15:44:08,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2022-01-18 15:44:08,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1892. [2022-01-18 15:44:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 4.081967213114754) internal successors, (7719), 1891 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:08,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7719 transitions. [2022-01-18 15:44:08,344 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7719 transitions. Word has length 26 [2022-01-18 15:44:08,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:08,344 INFO L470 AbstractCegarLoop]: Abstraction has 1892 states and 7719 transitions. [2022-01-18 15:44:08,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 15:44:08,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7719 transitions. [2022-01-18 15:44:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:08,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:08,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:08,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 15:44:08,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:08,548 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:08,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1867196842, now seen corresponding path program 26 times [2022-01-18 15:44:08,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:08,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159706360] [2022-01-18 15:44:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:08,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:08,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:08,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159706360] [2022-01-18 15:44:08,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159706360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:08,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433677737] [2022-01-18 15:44:08,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:08,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:08,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:08,613 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) [2022-01-18 15:44:08,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 15:44:08,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:08,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:08,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:08,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:08,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:08,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 15:44:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:08,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:09,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:09,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:09,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433677737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:09,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:09,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:44:09,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929099536] [2022-01-18 15:44:09,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:09,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:44:09,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:09,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:44:09,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:44:09,245 INFO L87 Difference]: Start difference. First operand 1892 states and 7719 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:10,103 INFO L93 Difference]: Finished difference Result 3080 states and 12618 transitions. [2022-01-18 15:44:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:44:10,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:10,109 INFO L225 Difference]: With dead ends: 3080 [2022-01-18 15:44:10,109 INFO L226 Difference]: Without dead ends: 2999 [2022-01-18 15:44:10,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:44:10,110 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 232 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 802 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:10,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 185 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 905 Invalid, 0 Unknown, 802 Unchecked, 0.4s Time] [2022-01-18 15:44:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2022-01-18 15:44:10,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 1926. [2022-01-18 15:44:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 4.086233766233766) internal successors, (7866), 1925 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7866 transitions. [2022-01-18 15:44:10,139 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7866 transitions. Word has length 26 [2022-01-18 15:44:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:10,139 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 7866 transitions. [2022-01-18 15:44:10,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7866 transitions. [2022-01-18 15:44:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:10,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:10,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:10,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:10,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:10,355 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:10,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1248808606, now seen corresponding path program 27 times [2022-01-18 15:44:10,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:10,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408617012] [2022-01-18 15:44:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:10,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:10,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:10,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408617012] [2022-01-18 15:44:10,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408617012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:10,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676289232] [2022-01-18 15:44:10,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:10,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:10,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:10,409 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) [2022-01-18 15:44:10,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 15:44:10,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:44:10,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:10,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:10,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:10,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:10,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:10,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:10,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:10,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676289232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:10,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:10,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:44:10,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018311341] [2022-01-18 15:44:10,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:10,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:44:10,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:44:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:44:10,865 INFO L87 Difference]: Start difference. First operand 1926 states and 7866 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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) [2022-01-18 15:44:11,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:11,964 INFO L93 Difference]: Finished difference Result 3335 states and 13165 transitions. [2022-01-18 15:44:11,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:44:11,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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 26 [2022-01-18 15:44:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:11,970 INFO L225 Difference]: With dead ends: 3335 [2022-01-18 15:44:11,970 INFO L226 Difference]: Without dead ends: 3145 [2022-01-18 15:44:11,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=358, Invalid=2092, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:44:11,971 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 383 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1583 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:11,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 275 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1306 Invalid, 0 Unknown, 1583 Unchecked, 0.4s Time] [2022-01-18 15:44:11,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2022-01-18 15:44:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 1946. [2022-01-18 15:44:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1945 states have (on average 4.089460154241645) internal successors, (7954), 1945 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 7954 transitions. [2022-01-18 15:44:12,001 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 7954 transitions. Word has length 26 [2022-01-18 15:44:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:12,001 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 7954 transitions. [2022-01-18 15:44:12,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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) [2022-01-18 15:44:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 7954 transitions. [2022-01-18 15:44:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:12,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:12,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:12,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:12,216 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,SelfDestructingSolverStorable111 [2022-01-18 15:44:12,216 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1385586132, now seen corresponding path program 28 times [2022-01-18 15:44:12,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:12,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500823480] [2022-01-18 15:44:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:12,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:12,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:12,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500823480] [2022-01-18 15:44:12,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500823480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:12,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437983634] [2022-01-18 15:44:12,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:12,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:12,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:12,283 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) [2022-01-18 15:44:12,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 15:44:12,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:12,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:12,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:12,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:12,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:12,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:44:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:12,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:12,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:12,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:12,505 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 3 [2022-01-18 15:44:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:12,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437983634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:12,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:12,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:44:12,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876439831] [2022-01-18 15:44:12,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:12,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:12,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:12,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:12,516 INFO L87 Difference]: Start difference. First operand 1946 states and 7954 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:12,919 INFO L93 Difference]: Finished difference Result 3038 states and 12066 transitions. [2022-01-18 15:44:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:44:12,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:12,925 INFO L225 Difference]: With dead ends: 3038 [2022-01-18 15:44:12,925 INFO L226 Difference]: Without dead ends: 2965 [2022-01-18 15:44:12,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:44:12,925 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 247 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:12,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 96 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1050 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-01-18 15:44:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2022-01-18 15:44:12,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 1979. [2022-01-18 15:44:12,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 4.0611729019211324) internal successors, (8033), 1978 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 8033 transitions. [2022-01-18 15:44:12,954 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 8033 transitions. Word has length 26 [2022-01-18 15:44:12,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:12,954 INFO L470 AbstractCegarLoop]: Abstraction has 1979 states and 8033 transitions. [2022-01-18 15:44:12,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 8033 transitions. [2022-01-18 15:44:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:12,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:12,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:12,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:13,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:13,174 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:13,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:13,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2052190500, now seen corresponding path program 22 times [2022-01-18 15:44:13,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:13,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729455856] [2022-01-18 15:44:13,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:13,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:13,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:13,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729455856] [2022-01-18 15:44:13,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729455856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:13,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842286750] [2022-01-18 15:44:13,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:13,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:13,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:13,264 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) [2022-01-18 15:44:13,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 15:44:13,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:13,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:13,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:13,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:13,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:13,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:13,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:13,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:13,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:13,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:13,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842286750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:13,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:13,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:44:13,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594318067] [2022-01-18 15:44:13,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:13,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:13,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:13,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:13,572 INFO L87 Difference]: Start difference. First operand 1979 states and 8033 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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) [2022-01-18 15:44:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:14,043 INFO L93 Difference]: Finished difference Result 2853 states and 11360 transitions. [2022-01-18 15:44:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:44:14,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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 26 [2022-01-18 15:44:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:14,049 INFO L225 Difference]: With dead ends: 2853 [2022-01-18 15:44:14,049 INFO L226 Difference]: Without dead ends: 2780 [2022-01-18 15:44:14,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:44:14,049 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 191 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:14,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 124 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1232 Invalid, 0 Unknown, 192 Unchecked, 0.4s Time] [2022-01-18 15:44:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2022-01-18 15:44:14,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 1952. [2022-01-18 15:44:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 4.071245515120451) internal successors, (7943), 1951 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 7943 transitions. [2022-01-18 15:44:14,080 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 7943 transitions. Word has length 26 [2022-01-18 15:44:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:14,080 INFO L470 AbstractCegarLoop]: Abstraction has 1952 states and 7943 transitions. [2022-01-18 15:44:14,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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) [2022-01-18 15:44:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 7943 transitions. [2022-01-18 15:44:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:14,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:14,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:14,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:14,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:14,283 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1251274198, now seen corresponding path program 29 times [2022-01-18 15:44:14,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:14,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943486343] [2022-01-18 15:44:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:14,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:14,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:14,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943486343] [2022-01-18 15:44:14,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943486343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:14,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460701901] [2022-01-18 15:44:14,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:14,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:14,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:14,351 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) [2022-01-18 15:44:14,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 15:44:14,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:14,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:14,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:14,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:14,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:14,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:44:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:14,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:14,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:14,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:44:14,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:14,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:14,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460701901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:14,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:14,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:14,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305560606] [2022-01-18 15:44:14,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:14,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:14,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:14,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:14,700 INFO L87 Difference]: Start difference. First operand 1952 states and 7943 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) [2022-01-18 15:44:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:15,167 INFO L93 Difference]: Finished difference Result 2535 states and 10195 transitions. [2022-01-18 15:44:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:44:15,167 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 26 [2022-01-18 15:44:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:15,173 INFO L225 Difference]: With dead ends: 2535 [2022-01-18 15:44:15,173 INFO L226 Difference]: Without dead ends: 2462 [2022-01-18 15:44:15,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:15,173 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 143 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:15,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 104 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 970 Invalid, 0 Unknown, 287 Unchecked, 0.4s Time] [2022-01-18 15:44:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-01-18 15:44:15,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1985. [2022-01-18 15:44:15,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 4.060483870967742) internal successors, (8056), 1984 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 8056 transitions. [2022-01-18 15:44:15,202 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 8056 transitions. Word has length 26 [2022-01-18 15:44:15,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:15,202 INFO L470 AbstractCegarLoop]: Abstraction has 1985 states and 8056 transitions. [2022-01-18 15:44:15,202 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) [2022-01-18 15:44:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 8056 transitions. [2022-01-18 15:44:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:15,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:15,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:15,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:15,421 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,SelfDestructingSolverStorable114 [2022-01-18 15:44:15,421 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1066280540, now seen corresponding path program 23 times [2022-01-18 15:44:15,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:15,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271862605] [2022-01-18 15:44:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:15,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:15,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:15,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271862605] [2022-01-18 15:44:15,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271862605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:15,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975376716] [2022-01-18 15:44:15,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:15,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:15,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:15,476 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) [2022-01-18 15:44:15,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 15:44:15,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:15,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:15,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:15,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:15,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:15,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:15,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:15,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:44:15,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:15,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:15,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975376716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:15,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:15,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:44:15,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970248469] [2022-01-18 15:44:15,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:15,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:15,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:15,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:15,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:15,831 INFO L87 Difference]: Start difference. First operand 1985 states and 8056 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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) [2022-01-18 15:44:16,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:16,172 INFO L93 Difference]: Finished difference Result 2575 states and 10343 transitions. [2022-01-18 15:44:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:44:16,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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 26 [2022-01-18 15:44:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:16,176 INFO L225 Difference]: With dead ends: 2575 [2022-01-18 15:44:16,176 INFO L226 Difference]: Without dead ends: 2486 [2022-01-18 15:44:16,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:16,177 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 126 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:16,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 103 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 871 Invalid, 0 Unknown, 280 Unchecked, 0.3s Time] [2022-01-18 15:44:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2022-01-18 15:44:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2018. [2022-01-18 15:44:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 4.050570153693604) internal successors, (8170), 2017 states have internal predecessors, (8170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 8170 transitions. [2022-01-18 15:44:16,203 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 8170 transitions. Word has length 26 [2022-01-18 15:44:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:16,203 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 8170 transitions. [2022-01-18 15:44:16,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 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) [2022-01-18 15:44:16,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 8170 transitions. [2022-01-18 15:44:16,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:16,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:16,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:16,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:16,421 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,SelfDestructingSolverStorable115 [2022-01-18 15:44:16,422 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2071750068, now seen corresponding path program 30 times [2022-01-18 15:44:16,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:16,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716700249] [2022-01-18 15:44:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:16,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:16,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716700249] [2022-01-18 15:44:16,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716700249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368040045] [2022-01-18 15:44:16,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:16,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:16,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:16,482 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) [2022-01-18 15:44:16,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 15:44:16,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:44:16,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:16,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:16,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:16,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:16,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:16,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:17,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:17,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-18 15:44:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:17,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368040045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:17,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:17,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:44:17,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754602115] [2022-01-18 15:44:17,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:17,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:44:17,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:17,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:44:17,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:44:17,083 INFO L87 Difference]: Start difference. First operand 2018 states and 8170 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:17,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:17,487 INFO L93 Difference]: Finished difference Result 2645 states and 10657 transitions. [2022-01-18 15:44:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:44:17,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:17,492 INFO L225 Difference]: With dead ends: 2645 [2022-01-18 15:44:17,492 INFO L226 Difference]: Without dead ends: 2638 [2022-01-18 15:44:17,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:44:17,492 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:17,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 144 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 486 Invalid, 0 Unknown, 215 Unchecked, 0.2s Time] [2022-01-18 15:44:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2022-01-18 15:44:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2050. [2022-01-18 15:44:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 4.042947779404588) internal successors, (8284), 2049 states have internal predecessors, (8284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 8284 transitions. [2022-01-18 15:44:17,520 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 8284 transitions. Word has length 26 [2022-01-18 15:44:17,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:17,520 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 8284 transitions. [2022-01-18 15:44:17,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 8284 transitions. [2022-01-18 15:44:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:17,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:17,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:17,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:17,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:17,736 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:17,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:17,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2043120917, now seen corresponding path program 2 times [2022-01-18 15:44:17,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:17,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775718392] [2022-01-18 15:44:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:17,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:17,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:17,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775718392] [2022-01-18 15:44:17,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775718392] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:17,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462825189] [2022-01-18 15:44:17,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:17,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:17,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:17,786 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) [2022-01-18 15:44:17,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 15:44:17,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:17,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:17,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:17,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:17,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:17,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 15:44:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:18,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:18,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:18,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-18 15:44:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:18,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462825189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:18,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:18,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:44:18,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191171730] [2022-01-18 15:44:18,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:18,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:44:18,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:18,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:44:18,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:44:18,253 INFO L87 Difference]: Start difference. First operand 2050 states and 8284 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:18,688 INFO L93 Difference]: Finished difference Result 2812 states and 11198 transitions. [2022-01-18 15:44:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:18,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:18,692 INFO L225 Difference]: With dead ends: 2812 [2022-01-18 15:44:18,692 INFO L226 Difference]: Without dead ends: 2705 [2022-01-18 15:44:18,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:44:18,693 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 155 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 555 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:18,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 112 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 671 Invalid, 0 Unknown, 555 Unchecked, 0.2s Time] [2022-01-18 15:44:18,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-01-18 15:44:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2025. [2022-01-18 15:44:18,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 4.051877470355731) internal successors, (8201), 2024 states have internal predecessors, (8201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 8201 transitions. [2022-01-18 15:44:18,720 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 8201 transitions. Word has length 26 [2022-01-18 15:44:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:18,720 INFO L470 AbstractCegarLoop]: Abstraction has 2025 states and 8201 transitions. [2022-01-18 15:44:18,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 8201 transitions. [2022-01-18 15:44:18,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:18,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:18,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:18,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:18,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:18,927 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:18,928 INFO L85 PathProgramCache]: Analyzing trace with hash -892788220, now seen corresponding path program 31 times [2022-01-18 15:44:18,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:18,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327568682] [2022-01-18 15:44:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:18,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:18,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:18,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327568682] [2022-01-18 15:44:18,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327568682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:18,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169593968] [2022-01-18 15:44:18,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:18,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:18,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:18,976 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) [2022-01-18 15:44:18,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 15:44:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:19,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:19,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:19,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:19,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-01-18 15:44:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:19,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:19,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:19,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:19,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:19,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169593968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:19,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:19,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:19,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415186509] [2022-01-18 15:44:19,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:19,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:19,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:19,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:19,207 INFO L87 Difference]: Start difference. First operand 2025 states and 8201 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 15:44:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:19,736 INFO L93 Difference]: Finished difference Result 2724 states and 10839 transitions. [2022-01-18 15:44:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:44:19,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 26 [2022-01-18 15:44:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:19,741 INFO L225 Difference]: With dead ends: 2724 [2022-01-18 15:44:19,741 INFO L226 Difference]: Without dead ends: 2652 [2022-01-18 15:44:19,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:19,741 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:19,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 138 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1288 Invalid, 0 Unknown, 251 Unchecked, 0.4s Time] [2022-01-18 15:44:19,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2022-01-18 15:44:19,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1999. [2022-01-18 15:44:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 4.05955955955956) internal successors, (8111), 1998 states have internal predecessors, (8111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 8111 transitions. [2022-01-18 15:44:19,769 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 8111 transitions. Word has length 26 [2022-01-18 15:44:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:19,769 INFO L470 AbstractCegarLoop]: Abstraction has 1999 states and 8111 transitions. [2022-01-18 15:44:19,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 15:44:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 8111 transitions. [2022-01-18 15:44:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:19,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:19,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:19,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:19,985 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,SelfDestructingSolverStorable118 [2022-01-18 15:44:19,986 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:19,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:19,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1028805654, now seen corresponding path program 32 times [2022-01-18 15:44:19,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:19,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112889897] [2022-01-18 15:44:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:19,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:20,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:20,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112889897] [2022-01-18 15:44:20,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112889897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:20,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236852267] [2022-01-18 15:44:20,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:20,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:20,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:20,066 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) [2022-01-18 15:44:20,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 15:44:20,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:20,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:20,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:44:20,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:20,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:20,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:20,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:20,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:20,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:20,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236852267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:20,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:20,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 15:44:20,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286562552] [2022-01-18 15:44:20,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:20,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:20,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:20,605 INFO L87 Difference]: Start difference. First operand 1999 states and 8111 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) [2022-01-18 15:44:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:21,179 INFO L93 Difference]: Finished difference Result 2689 states and 10784 transitions. [2022-01-18 15:44:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:44:21,179 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 26 [2022-01-18 15:44:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:21,183 INFO L225 Difference]: With dead ends: 2689 [2022-01-18 15:44:21,183 INFO L226 Difference]: Without dead ends: 2624 [2022-01-18 15:44:21,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:44:21,184 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 223 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 922 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:21,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 122 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 916 Invalid, 0 Unknown, 922 Unchecked, 0.3s Time] [2022-01-18 15:44:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2022-01-18 15:44:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2008. [2022-01-18 15:44:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 4.061783756851021) internal successors, (8152), 2007 states have internal predecessors, (8152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 8152 transitions. [2022-01-18 15:44:21,211 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 8152 transitions. Word has length 26 [2022-01-18 15:44:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:21,211 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 8152 transitions. [2022-01-18 15:44:21,211 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) [2022-01-18 15:44:21,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 8152 transitions. [2022-01-18 15:44:21,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:21,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:21,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:21,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:21,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:21,429 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:21,429 INFO L85 PathProgramCache]: Analyzing trace with hash 150156194, now seen corresponding path program 33 times [2022-01-18 15:44:21,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:21,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051399392] [2022-01-18 15:44:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:21,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:21,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:21,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051399392] [2022-01-18 15:44:21,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051399392] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:21,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522036877] [2022-01-18 15:44:21,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:21,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:21,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:21,508 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) [2022-01-18 15:44:21,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 15:44:21,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:44:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:44:21,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:21,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:21,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:21,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:21,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:21,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-18 15:44:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:22,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522036877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:22,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:22,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:44:22,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209119139] [2022-01-18 15:44:22,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:22,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:44:22,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:44:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:44:22,011 INFO L87 Difference]: Start difference. First operand 2008 states and 8152 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2022-01-18 15:44:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:22,642 INFO L93 Difference]: Finished difference Result 2729 states and 10920 transitions. [2022-01-18 15:44:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:44:22,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2022-01-18 15:44:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:22,647 INFO L225 Difference]: With dead ends: 2729 [2022-01-18 15:44:22,647 INFO L226 Difference]: Without dead ends: 2664 [2022-01-18 15:44:22,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:44:22,648 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 153 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:22,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 130 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 810 Invalid, 0 Unknown, 466 Unchecked, 0.3s Time] [2022-01-18 15:44:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-01-18 15:44:22,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2007. [2022-01-18 15:44:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 4.062313060817547) internal successors, (8149), 2006 states have internal predecessors, (8149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 8149 transitions. [2022-01-18 15:44:22,675 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 8149 transitions. Word has length 26 [2022-01-18 15:44:22,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:22,675 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 8149 transitions. [2022-01-18 15:44:22,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2022-01-18 15:44:22,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 8149 transitions. [2022-01-18 15:44:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:22,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:22,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:22,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:22,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:22,882 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:22,883 INFO L85 PathProgramCache]: Analyzing trace with hash 939524812, now seen corresponding path program 34 times [2022-01-18 15:44:22,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:22,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371634750] [2022-01-18 15:44:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:22,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:22,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:22,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371634750] [2022-01-18 15:44:22,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371634750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:22,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241458823] [2022-01-18 15:44:22,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:22,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:22,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:22,950 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) [2022-01-18 15:44:22,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 15:44:22,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:22,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:22,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:22,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:23,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:23,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:23,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:23,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:23,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:44:23,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:23,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:23,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241458823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:23,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:23,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:23,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937276629] [2022-01-18 15:44:23,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:23,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:23,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:23,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:23,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:23,291 INFO L87 Difference]: Start difference. First operand 2007 states and 8149 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) [2022-01-18 15:44:23,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:23,692 INFO L93 Difference]: Finished difference Result 2500 states and 10081 transitions. [2022-01-18 15:44:23,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:44:23,692 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 26 [2022-01-18 15:44:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:23,696 INFO L225 Difference]: With dead ends: 2500 [2022-01-18 15:44:23,696 INFO L226 Difference]: Without dead ends: 2419 [2022-01-18 15:44:23,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:23,697 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:23,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 89 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 812 Invalid, 0 Unknown, 112 Unchecked, 0.3s Time] [2022-01-18 15:44:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2022-01-18 15:44:23,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2019. [2022-01-18 15:44:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 4.0599603567889) internal successors, (8193), 2018 states have internal predecessors, (8193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 8193 transitions. [2022-01-18 15:44:23,723 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 8193 transitions. Word has length 26 [2022-01-18 15:44:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:23,723 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 8193 transitions. [2022-01-18 15:44:23,723 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) [2022-01-18 15:44:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 8193 transitions. [2022-01-18 15:44:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:23,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:23,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:23,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:23,941 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,SelfDestructingSolverStorable121 [2022-01-18 15:44:23,941 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2113511108, now seen corresponding path program 35 times [2022-01-18 15:44:23,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:23,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056368477] [2022-01-18 15:44:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:23,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:24,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:24,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056368477] [2022-01-18 15:44:24,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056368477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:24,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452776035] [2022-01-18 15:44:24,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:24,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:24,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:24,007 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) [2022-01-18 15:44:24,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 15:44:24,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:24,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:24,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:24,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:24,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:44:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:24,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:24,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:24,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:24,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:24,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:24,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452776035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:24,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:24,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:24,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485661730] [2022-01-18 15:44:24,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:24,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:24,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:24,323 INFO L87 Difference]: Start difference. First operand 2019 states and 8193 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 15:44:24,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:24,776 INFO L93 Difference]: Finished difference Result 2511 states and 10079 transitions. [2022-01-18 15:44:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:44:24,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 26 [2022-01-18 15:44:24,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:24,781 INFO L225 Difference]: With dead ends: 2511 [2022-01-18 15:44:24,781 INFO L226 Difference]: Without dead ends: 2444 [2022-01-18 15:44:24,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:44:24,781 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:24,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 121 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1100 Invalid, 0 Unknown, 249 Unchecked, 0.4s Time] [2022-01-18 15:44:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-01-18 15:44:24,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2011. [2022-01-18 15:44:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 4.057213930348259) internal successors, (8155), 2010 states have internal predecessors, (8155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 8155 transitions. [2022-01-18 15:44:24,807 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 8155 transitions. Word has length 26 [2022-01-18 15:44:24,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:24,807 INFO L470 AbstractCegarLoop]: Abstraction has 2011 states and 8155 transitions. [2022-01-18 15:44:24,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 15:44:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 8155 transitions. [2022-01-18 15:44:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:24,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:24,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:24,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:25,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:25,024 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:25,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:25,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1284605652, now seen corresponding path program 36 times [2022-01-18 15:44:25,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:25,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104985934] [2022-01-18 15:44:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:25,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:25,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:25,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104985934] [2022-01-18 15:44:25,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104985934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:25,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664011452] [2022-01-18 15:44:25,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:25,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:25,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:25,083 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) [2022-01-18 15:44:25,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 15:44:25,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:44:25,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:25,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:25,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:25,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:25,231 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:25,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:25,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:25,626 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 25 treesize of output 24 [2022-01-18 15:44:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:25,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664011452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:25,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:25,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:44:25,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86340189] [2022-01-18 15:44:25,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:25,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:44:25,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:25,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:44:25,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:44:25,687 INFO L87 Difference]: Start difference. First operand 2011 states and 8155 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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) [2022-01-18 15:44:26,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:26,572 INFO L93 Difference]: Finished difference Result 2921 states and 11580 transitions. [2022-01-18 15:44:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:44:26,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 26 [2022-01-18 15:44:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:26,577 INFO L225 Difference]: With dead ends: 2921 [2022-01-18 15:44:26,577 INFO L226 Difference]: Without dead ends: 2850 [2022-01-18 15:44:26,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=1251, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:44:26,578 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 258 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:26,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 158 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 995 Invalid, 0 Unknown, 674 Unchecked, 0.4s Time] [2022-01-18 15:44:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2022-01-18 15:44:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2023. [2022-01-18 15:44:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 4.053412462908012) internal successors, (8196), 2022 states have internal predecessors, (8196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 8196 transitions. [2022-01-18 15:44:26,606 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 8196 transitions. Word has length 26 [2022-01-18 15:44:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:26,606 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 8196 transitions. [2022-01-18 15:44:26,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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) [2022-01-18 15:44:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 8196 transitions. [2022-01-18 15:44:26,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:26,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:26,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:26,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:26,811 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,SelfDestructingSolverStorable123 [2022-01-18 15:44:26,812 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:26,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:26,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1175252474, now seen corresponding path program 24 times [2022-01-18 15:44:26,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:26,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152379337] [2022-01-18 15:44:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:26,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:26,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:26,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152379337] [2022-01-18 15:44:26,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152379337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:26,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919350391] [2022-01-18 15:44:26,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:26,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:26,890 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) [2022-01-18 15:44:26,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 15:44:26,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:44:26,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:26,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:44:26,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:27,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:27,023 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 11 treesize of output 15 [2022-01-18 15:44:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:27,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:27,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:27,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-18 15:44:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:27,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919350391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:27,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:27,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:44:27,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212598547] [2022-01-18 15:44:27,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:27,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:44:27,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:27,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:44:27,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:44:27,421 INFO L87 Difference]: Start difference. First operand 2023 states and 8196 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:28,271 INFO L93 Difference]: Finished difference Result 3004 states and 11791 transitions. [2022-01-18 15:44:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:44:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:28,276 INFO L225 Difference]: With dead ends: 3004 [2022-01-18 15:44:28,277 INFO L226 Difference]: Without dead ends: 2920 [2022-01-18 15:44:28,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:44:28,277 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 851 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:28,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 183 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1144 Invalid, 0 Unknown, 851 Unchecked, 0.4s Time] [2022-01-18 15:44:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2022-01-18 15:44:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 2029. [2022-01-18 15:44:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 4.054240631163708) internal successors, (8222), 2028 states have internal predecessors, (8222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 8222 transitions. [2022-01-18 15:44:28,306 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 8222 transitions. Word has length 26 [2022-01-18 15:44:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:28,306 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 8222 transitions. [2022-01-18 15:44:28,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:28,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 8222 transitions. [2022-01-18 15:44:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:28,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:28,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:28,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:28,520 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,SelfDestructingSolverStorable124 [2022-01-18 15:44:28,521 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash -372713892, now seen corresponding path program 25 times [2022-01-18 15:44:28,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:28,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171522430] [2022-01-18 15:44:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:28,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:28,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:28,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171522430] [2022-01-18 15:44:28,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171522430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:28,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443000503] [2022-01-18 15:44:28,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:28,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:28,591 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) [2022-01-18 15:44:28,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 15:44:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:28,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:28,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:28,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:28,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:28,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:28,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:28,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:28,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:28,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:28,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443000503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:28,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:28,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:28,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309783055] [2022-01-18 15:44:28,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:28,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:28,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:28,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:28,897 INFO L87 Difference]: Start difference. First operand 2029 states and 8222 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 15:44:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:29,349 INFO L93 Difference]: Finished difference Result 2526 states and 10154 transitions. [2022-01-18 15:44:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:44:29,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 26 [2022-01-18 15:44:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:29,354 INFO L225 Difference]: With dead ends: 2526 [2022-01-18 15:44:29,354 INFO L226 Difference]: Without dead ends: 2451 [2022-01-18 15:44:29,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:44:29,354 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:29,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 103 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1032 Invalid, 0 Unknown, 139 Unchecked, 0.4s Time] [2022-01-18 15:44:29,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-01-18 15:44:29,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2024. [2022-01-18 15:44:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 4.052891744933268) internal successors, (8199), 2023 states have internal predecessors, (8199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 8199 transitions. [2022-01-18 15:44:29,380 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 8199 transitions. Word has length 26 [2022-01-18 15:44:29,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:29,380 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 8199 transitions. [2022-01-18 15:44:29,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 15:44:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 8199 transitions. [2022-01-18 15:44:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:29,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:29,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:29,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:29,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 15:44:29,585 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:29,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:29,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1599805662, now seen corresponding path program 26 times [2022-01-18 15:44:29,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:29,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362359341] [2022-01-18 15:44:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:29,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:29,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:29,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362359341] [2022-01-18 15:44:29,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362359341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:29,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592655275] [2022-01-18 15:44:29,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:29,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:29,634 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) [2022-01-18 15:44:29,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 15:44:29,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:29,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:29,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:29,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:29,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:29,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:29,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:29,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:29,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:29,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:29,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592655275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:29,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:29,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:29,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886006931] [2022-01-18 15:44:29,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:29,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:29,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:29,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:29,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:29,887 INFO L87 Difference]: Start difference. First operand 2024 states and 8199 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:30,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:30,221 INFO L93 Difference]: Finished difference Result 2509 states and 10087 transitions. [2022-01-18 15:44:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:44:30,222 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:30,226 INFO L225 Difference]: With dead ends: 2509 [2022-01-18 15:44:30,226 INFO L226 Difference]: Without dead ends: 2434 [2022-01-18 15:44:30,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:44:30,226 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 173 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:30,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 84 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 829 Invalid, 0 Unknown, 201 Unchecked, 0.2s Time] [2022-01-18 15:44:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2022-01-18 15:44:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2021. [2022-01-18 15:44:30,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 2020 states have (on average 4.054950495049505) internal successors, (8191), 2020 states have internal predecessors, (8191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 8191 transitions. [2022-01-18 15:44:30,271 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 8191 transitions. Word has length 26 [2022-01-18 15:44:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:30,271 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 8191 transitions. [2022-01-18 15:44:30,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 8191 transitions. [2022-01-18 15:44:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:30,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:30,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:30,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 15:44:30,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:30,495 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:30,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:30,495 INFO L85 PathProgramCache]: Analyzing trace with hash 526936228, now seen corresponding path program 27 times [2022-01-18 15:44:30,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:30,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554035006] [2022-01-18 15:44:30,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:30,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:30,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:30,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554035006] [2022-01-18 15:44:30,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554035006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:30,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842419179] [2022-01-18 15:44:30,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:30,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:30,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:30,550 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) [2022-01-18 15:44:30,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 15:44:30,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:44:30,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:30,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:44:30,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:30,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:30,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:30,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:31,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:31,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-18 15:44:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:31,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842419179] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:31,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:31,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-01-18 15:44:31,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015326297] [2022-01-18 15:44:31,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:31,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:44:31,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:31,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:44:31,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:44:31,076 INFO L87 Difference]: Start difference. First operand 2021 states and 8191 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:32,088 INFO L93 Difference]: Finished difference Result 2971 states and 11623 transitions. [2022-01-18 15:44:32,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:44:32,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:32,094 INFO L225 Difference]: With dead ends: 2971 [2022-01-18 15:44:32,094 INFO L226 Difference]: Without dead ends: 2894 [2022-01-18 15:44:32,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:44:32,095 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 358 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1004 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:32,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 189 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1355 Invalid, 0 Unknown, 1004 Unchecked, 0.5s Time] [2022-01-18 15:44:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2022-01-18 15:44:32,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2022. [2022-01-18 15:44:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 4.052944087085601) internal successors, (8191), 2021 states have internal predecessors, (8191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 8191 transitions. [2022-01-18 15:44:32,127 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 8191 transitions. Word has length 26 [2022-01-18 15:44:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:32,128 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 8191 transitions. [2022-01-18 15:44:32,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 8191 transitions. [2022-01-18 15:44:32,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:32,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:32,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:32,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-18 15:44:32,346 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,SelfDestructingSolverStorable127 [2022-01-18 15:44:32,346 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:32,347 INFO L85 PathProgramCache]: Analyzing trace with hash -256871460, now seen corresponding path program 37 times [2022-01-18 15:44:32,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:32,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851175987] [2022-01-18 15:44:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:32,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:32,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:32,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851175987] [2022-01-18 15:44:32,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851175987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:32,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624770028] [2022-01-18 15:44:32,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:32,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:32,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:32,415 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) [2022-01-18 15:44:32,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 15:44:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:32,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:32,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:32,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:32,542 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 [2022-01-18 15:44:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:32,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:32,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:32,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:32,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:32,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:32,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624770028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:32,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:32,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:32,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947742075] [2022-01-18 15:44:32,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:32,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:32,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:32,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:32,735 INFO L87 Difference]: Start difference. First operand 2022 states and 8191 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) [2022-01-18 15:44:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:33,187 INFO L93 Difference]: Finished difference Result 2572 states and 10313 transitions. [2022-01-18 15:44:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:44:33,187 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 26 [2022-01-18 15:44:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:33,192 INFO L225 Difference]: With dead ends: 2572 [2022-01-18 15:44:33,192 INFO L226 Difference]: Without dead ends: 2493 [2022-01-18 15:44:33,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:33,192 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 177 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:33,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 95 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1178 Invalid, 0 Unknown, 122 Unchecked, 0.3s Time] [2022-01-18 15:44:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-01-18 15:44:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2005. [2022-01-18 15:44:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 4.058383233532934) internal successors, (8133), 2004 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 8133 transitions. [2022-01-18 15:44:33,218 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 8133 transitions. Word has length 26 [2022-01-18 15:44:33,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:33,219 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 8133 transitions. [2022-01-18 15:44:33,219 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) [2022-01-18 15:44:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 8133 transitions. [2022-01-18 15:44:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:33,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:33,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:33,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:33,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-01-18 15:44:33,424 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2068209292, now seen corresponding path program 28 times [2022-01-18 15:44:33,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:33,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128704583] [2022-01-18 15:44:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:33,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:33,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128704583] [2022-01-18 15:44:33,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128704583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371440716] [2022-01-18 15:44:33,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:33,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:33,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:33,494 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) [2022-01-18 15:44:33,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 15:44:33,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:33,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:33,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:33,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:33,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:33,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:33,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:33,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:33,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:33,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:33,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:33,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371440716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:33,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:33,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:33,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684487671] [2022-01-18 15:44:33,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:33,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:33,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:33,869 INFO L87 Difference]: Start difference. First operand 2005 states and 8133 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-01-18 15:44:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:34,395 INFO L93 Difference]: Finished difference Result 2465 states and 9901 transitions. [2022-01-18 15:44:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:44:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 26 [2022-01-18 15:44:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:34,399 INFO L225 Difference]: With dead ends: 2465 [2022-01-18 15:44:34,399 INFO L226 Difference]: Without dead ends: 2417 [2022-01-18 15:44:34,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:44:34,399 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:34,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 101 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1146 Invalid, 0 Unknown, 129 Unchecked, 0.4s Time] [2022-01-18 15:44:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-01-18 15:44:34,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1993. [2022-01-18 15:44:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 4.06074297188755) internal successors, (8089), 1992 states have internal predecessors, (8089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 8089 transitions. [2022-01-18 15:44:34,425 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 8089 transitions. Word has length 26 [2022-01-18 15:44:34,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:34,425 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 8089 transitions. [2022-01-18 15:44:34,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-01-18 15:44:34,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 8089 transitions. [2022-01-18 15:44:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:34,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:34,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:34,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:34,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-01-18 15:44:34,633 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:34,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1623999605, now seen corresponding path program 22 times [2022-01-18 15:44:34,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:34,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116718811] [2022-01-18 15:44:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:34,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:34,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:34,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116718811] [2022-01-18 15:44:34,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116718811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:34,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120186531] [2022-01-18 15:44:34,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:34,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:34,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:34,705 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) [2022-01-18 15:44:34,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 15:44:34,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:34,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:34,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:34,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:44:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:34,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:34,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:34,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:44:34,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:34,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:34,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120186531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:34,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:34,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:34,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938548622] [2022-01-18 15:44:34,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:34,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:34,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:34,927 INFO L87 Difference]: Start difference. First operand 1993 states and 8089 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) [2022-01-18 15:44:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:35,258 INFO L93 Difference]: Finished difference Result 3145 states and 12499 transitions. [2022-01-18 15:44:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:44:35,259 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 26 [2022-01-18 15:44:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:35,264 INFO L225 Difference]: With dead ends: 3145 [2022-01-18 15:44:35,264 INFO L226 Difference]: Without dead ends: 3063 [2022-01-18 15:44:35,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:35,264 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:35,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 131 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 908 Invalid, 0 Unknown, 418 Unchecked, 0.3s Time] [2022-01-18 15:44:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2022-01-18 15:44:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 2026. [2022-01-18 15:44:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 4.042962962962963) internal successors, (8187), 2025 states have internal predecessors, (8187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 8187 transitions. [2022-01-18 15:44:35,293 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 8187 transitions. Word has length 26 [2022-01-18 15:44:35,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:35,294 INFO L470 AbstractCegarLoop]: Abstraction has 2026 states and 8187 transitions. [2022-01-18 15:44:35,294 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) [2022-01-18 15:44:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 8187 transitions. [2022-01-18 15:44:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:35,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:35,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:35,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:35,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:35,516 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:35,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1439005947, now seen corresponding path program 17 times [2022-01-18 15:44:35,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:35,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493140443] [2022-01-18 15:44:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:35,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:35,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:35,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493140443] [2022-01-18 15:44:35,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493140443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:35,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282094412] [2022-01-18 15:44:35,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:35,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:35,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:35,582 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) [2022-01-18 15:44:35,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 15:44:35,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:35,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:44:35,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:35,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:35,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:35,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:35,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:35,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-18 15:44:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:35,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282094412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:35,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:35,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 15:44:35,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049797598] [2022-01-18 15:44:35,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:35,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:35,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:35,986 INFO L87 Difference]: Start difference. First operand 2026 states and 8187 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2022-01-18 15:44:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:36,782 INFO L93 Difference]: Finished difference Result 4071 states and 15671 transitions. [2022-01-18 15:44:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:44:36,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 26 [2022-01-18 15:44:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:36,790 INFO L225 Difference]: With dead ends: 4071 [2022-01-18 15:44:36,791 INFO L226 Difference]: Without dead ends: 3938 [2022-01-18 15:44:36,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:44:36,791 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 359 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 596 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:36,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 165 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1459 Invalid, 0 Unknown, 596 Unchecked, 0.5s Time] [2022-01-18 15:44:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2022-01-18 15:44:36,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 2005. [2022-01-18 15:44:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 4.056387225548902) internal successors, (8129), 2004 states have internal predecessors, (8129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 8129 transitions. [2022-01-18 15:44:36,874 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 8129 transitions. Word has length 26 [2022-01-18 15:44:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:36,874 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 8129 transitions. [2022-01-18 15:44:36,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2022-01-18 15:44:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 8129 transitions. [2022-01-18 15:44:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:36,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:36,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:36,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:37,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:37,080 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash -142302385, now seen corresponding path program 23 times [2022-01-18 15:44:37,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:37,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490428249] [2022-01-18 15:44:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:37,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:37,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:37,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490428249] [2022-01-18 15:44:37,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490428249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:37,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660712754] [2022-01-18 15:44:37,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:37,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:37,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:37,159 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) [2022-01-18 15:44:37,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 15:44:37,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:44:37,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:37,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:37,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:37,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:37,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:37,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:37,469 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 11 treesize of output 16 [2022-01-18 15:44:37,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:37,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:37,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660712754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:37,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:37,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:37,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914208173] [2022-01-18 15:44:37,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:37,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:37,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:37,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:37,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:37,494 INFO L87 Difference]: Start difference. First operand 2005 states and 8129 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) [2022-01-18 15:44:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:37,928 INFO L93 Difference]: Finished difference Result 2691 states and 10788 transitions. [2022-01-18 15:44:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:44:37,928 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 26 [2022-01-18 15:44:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:37,933 INFO L225 Difference]: With dead ends: 2691 [2022-01-18 15:44:37,933 INFO L226 Difference]: Without dead ends: 2609 [2022-01-18 15:44:37,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:44:37,933 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 123 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:37,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 114 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 932 Invalid, 0 Unknown, 301 Unchecked, 0.3s Time] [2022-01-18 15:44:37,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2022-01-18 15:44:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2020. [2022-01-18 15:44:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 4.053491827637444) internal successors, (8184), 2019 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:37,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 8184 transitions. [2022-01-18 15:44:37,960 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 8184 transitions. Word has length 26 [2022-01-18 15:44:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:37,961 INFO L470 AbstractCegarLoop]: Abstraction has 2020 states and 8184 transitions. [2022-01-18 15:44:37,961 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) [2022-01-18 15:44:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 8184 transitions. [2022-01-18 15:44:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:37,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:37,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:37,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:38,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:38,168 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash 42691273, now seen corresponding path program 18 times [2022-01-18 15:44:38,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:38,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403369957] [2022-01-18 15:44:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:38,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:38,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:38,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403369957] [2022-01-18 15:44:38,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403369957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:38,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278774224] [2022-01-18 15:44:38,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:38,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:38,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:38,256 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) [2022-01-18 15:44:38,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 15:44:38,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:44:38,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:44:38,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:38,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:38,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:38,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:38,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:38,757 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 20 treesize of output 21 [2022-01-18 15:44:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:38,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278774224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:38,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:38,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-01-18 15:44:38,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264778172] [2022-01-18 15:44:38,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:38,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:44:38,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:38,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:44:38,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:44:38,804 INFO L87 Difference]: Start difference. First operand 2020 states and 8184 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:40,343 INFO L93 Difference]: Finished difference Result 4333 states and 17147 transitions. [2022-01-18 15:44:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:44:40,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:40,351 INFO L225 Difference]: With dead ends: 4333 [2022-01-18 15:44:40,352 INFO L226 Difference]: Without dead ends: 4096 [2022-01-18 15:44:40,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=3557, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 15:44:40,352 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 605 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1474 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:40,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 191 Invalid, 3213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1604 Invalid, 0 Unknown, 1474 Unchecked, 0.5s Time] [2022-01-18 15:44:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4096 states. [2022-01-18 15:44:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4096 to 2058. [2022-01-18 15:44:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 4.040836169178415) internal successors, (8312), 2057 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 8312 transitions. [2022-01-18 15:44:40,385 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 8312 transitions. Word has length 26 [2022-01-18 15:44:40,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:40,385 INFO L470 AbstractCegarLoop]: Abstraction has 2058 states and 8312 transitions. [2022-01-18 15:44:40,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 8312 transitions. [2022-01-18 15:44:40,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:40,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:40,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:40,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:40,596 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,SelfDestructingSolverStorable133 [2022-01-18 15:44:40,596 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:40,596 INFO L85 PathProgramCache]: Analyzing trace with hash -309581923, now seen corresponding path program 24 times [2022-01-18 15:44:40,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:40,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352163015] [2022-01-18 15:44:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:40,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:40,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:40,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352163015] [2022-01-18 15:44:40,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352163015] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:40,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427407088] [2022-01-18 15:44:40,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:40,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:40,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:40,646 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) [2022-01-18 15:44:40,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 15:44:40,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:44:40,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:40,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:40,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:40,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:40,731 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 [2022-01-18 15:44:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:40,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:40,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:40,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-01-18 15:44:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:40,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427407088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:40,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:40,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-01-18 15:44:40,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336942922] [2022-01-18 15:44:40,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:40,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:44:40,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:44:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:40,958 INFO L87 Difference]: Start difference. First operand 2058 states and 8312 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:42,041 INFO L93 Difference]: Finished difference Result 2833 states and 11324 transitions. [2022-01-18 15:44:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:44:42,041 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:42,047 INFO L225 Difference]: With dead ends: 2833 [2022-01-18 15:44:42,047 INFO L226 Difference]: Without dead ends: 2733 [2022-01-18 15:44:42,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=1221, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:44:42,047 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 333 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:42,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 108 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:44:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2022-01-18 15:44:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2067. [2022-01-18 15:44:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 4.040174249757986) internal successors, (8347), 2066 states have internal predecessors, (8347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 8347 transitions. [2022-01-18 15:44:42,075 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 8347 transitions. Word has length 26 [2022-01-18 15:44:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:42,075 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 8347 transitions. [2022-01-18 15:44:42,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 8347 transitions. [2022-01-18 15:44:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:42,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:42,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:42,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:42,291 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,SelfDestructingSolverStorable134 [2022-01-18 15:44:42,291 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1922060491, now seen corresponding path program 25 times [2022-01-18 15:44:42,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:42,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404885672] [2022-01-18 15:44:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:42,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:42,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:42,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404885672] [2022-01-18 15:44:42,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404885672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:42,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693408554] [2022-01-18 15:44:42,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:42,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:42,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:42,359 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) [2022-01-18 15:44:42,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 15:44:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:42,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:42,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:42,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:44:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:42,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:42,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:42,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-18 15:44:42,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:42,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:42,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693408554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:42,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:42,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:44:42,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281666855] [2022-01-18 15:44:42,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:42,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:42,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:42,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:42,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:42,593 INFO L87 Difference]: Start difference. First operand 2067 states and 8347 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) [2022-01-18 15:44:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:42,968 INFO L93 Difference]: Finished difference Result 2731 states and 10934 transitions. [2022-01-18 15:44:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:44:42,969 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 26 [2022-01-18 15:44:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:42,973 INFO L225 Difference]: With dead ends: 2731 [2022-01-18 15:44:42,973 INFO L226 Difference]: Without dead ends: 2649 [2022-01-18 15:44:42,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:42,974 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:42,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 110 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1044 Invalid, 0 Unknown, 208 Unchecked, 0.3s Time] [2022-01-18 15:44:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2022-01-18 15:44:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2070. [2022-01-18 15:44:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 4.039149347510874) internal successors, (8357), 2069 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 8357 transitions. [2022-01-18 15:44:43,002 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 8357 transitions. Word has length 26 [2022-01-18 15:44:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:43,002 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 8357 transitions. [2022-01-18 15:44:43,002 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) [2022-01-18 15:44:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 8357 transitions. [2022-01-18 15:44:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:43,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:43,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:43,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:43,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 15:44:43,211 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:43,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:43,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1515795553, now seen corresponding path program 19 times [2022-01-18 15:44:43,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:43,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529934415] [2022-01-18 15:44:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:43,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:43,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:43,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529934415] [2022-01-18 15:44:43,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529934415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:43,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368397454] [2022-01-18 15:44:43,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:43,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:43,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:43,309 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) [2022-01-18 15:44:43,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 15:44:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:43,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:43,450 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 [2022-01-18 15:44:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:43,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:43,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:43,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:43,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:43,640 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:43,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368397454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:43,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:43,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-18 15:44:43,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088895769] [2022-01-18 15:44:43,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:43,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:44:43,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:43,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:44:43,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:44:43,651 INFO L87 Difference]: Start difference. First operand 2070 states and 8357 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2022-01-18 15:44:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:44,042 INFO L93 Difference]: Finished difference Result 2678 states and 10756 transitions. [2022-01-18 15:44:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:44:44,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 26 [2022-01-18 15:44:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:44,047 INFO L225 Difference]: With dead ends: 2678 [2022-01-18 15:44:44,047 INFO L226 Difference]: Without dead ends: 2596 [2022-01-18 15:44:44,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:44,048 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 166 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:44,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 92 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1020 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2022-01-18 15:44:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2022-01-18 15:44:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2072. [2022-01-18 15:44:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 4.040560115886046) internal successors, (8368), 2071 states have internal predecessors, (8368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 8368 transitions. [2022-01-18 15:44:44,075 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 8368 transitions. Word has length 26 [2022-01-18 15:44:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:44,075 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 8368 transitions. [2022-01-18 15:44:44,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2022-01-18 15:44:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 8368 transitions. [2022-01-18 15:44:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:44,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:44,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:44,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 15:44:44,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 15:44:44,291 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:44,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:44,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1013143211, now seen corresponding path program 20 times [2022-01-18 15:44:44,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:44,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624969445] [2022-01-18 15:44:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:44,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:44,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:44,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624969445] [2022-01-18 15:44:44,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624969445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:44,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923860709] [2022-01-18 15:44:44,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:44,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:44,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:44,412 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) [2022-01-18 15:44:44,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 15:44:44,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:44,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:44,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:44:44,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:44,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:44,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:44:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:44,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:44,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:44,937 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 21 treesize of output 22 [2022-01-18 15:44:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:44,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923860709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:44,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:44,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-18 15:44:44,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999396160] [2022-01-18 15:44:44,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:44,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:44:44,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:44,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:44:44,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:44:44,975 INFO L87 Difference]: Start difference. First operand 2072 states and 8368 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:47,241 INFO L93 Difference]: Finished difference Result 4517 states and 17120 transitions. [2022-01-18 15:44:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 15:44:47,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:47,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:47,249 INFO L225 Difference]: With dead ends: 4517 [2022-01-18 15:44:47,249 INFO L226 Difference]: Without dead ends: 4008 [2022-01-18 15:44:47,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=637, Invalid=2555, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:44:47,250 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 751 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:47,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 232 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 15:44:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2022-01-18 15:44:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 2099. [2022-01-18 15:44:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 4.048141086749285) internal successors, (8493), 2098 states have internal predecessors, (8493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 8493 transitions. [2022-01-18 15:44:47,314 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 8493 transitions. Word has length 26 [2022-01-18 15:44:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:47,314 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 8493 transitions. [2022-01-18 15:44:47,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 8493 transitions. [2022-01-18 15:44:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:47,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:47,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:47,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:47,524 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,SelfDestructingSolverStorable137 [2022-01-18 15:44:47,524 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:47,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:47,525 INFO L85 PathProgramCache]: Analyzing trace with hash -615117553, now seen corresponding path program 26 times [2022-01-18 15:44:47,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:47,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851229481] [2022-01-18 15:44:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:47,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:47,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:47,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851229481] [2022-01-18 15:44:47,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851229481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488455520] [2022-01-18 15:44:47,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:47,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:47,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:47,600 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) [2022-01-18 15:44:47,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 15:44:47,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:47,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:47,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:44:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:47,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:47,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 15:44:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:47,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:48,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:48,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-01-18 15:44:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:48,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488455520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:48,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:48,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-01-18 15:44:48,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050670263] [2022-01-18 15:44:48,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:48,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:44:48,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:48,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:44:48,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:44:48,113 INFO L87 Difference]: Start difference. First operand 2099 states and 8493 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:48,992 INFO L93 Difference]: Finished difference Result 2814 states and 11290 transitions. [2022-01-18 15:44:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:44:48,993 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 15:44:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:48,998 INFO L225 Difference]: With dead ends: 2814 [2022-01-18 15:44:48,998 INFO L226 Difference]: Without dead ends: 2740 [2022-01-18 15:44:48,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:44:48,998 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 222 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:48,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 115 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:44:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2022-01-18 15:44:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2087. [2022-01-18 15:44:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 4.049856184084372) internal successors, (8448), 2086 states have internal predecessors, (8448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 8448 transitions. [2022-01-18 15:44:49,026 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 8448 transitions. Word has length 26 [2022-01-18 15:44:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:49,027 INFO L470 AbstractCegarLoop]: Abstraction has 2087 states and 8448 transitions. [2022-01-18 15:44:49,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 8448 transitions. [2022-01-18 15:44:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 15:44:49,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:49,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:49,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:49,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-01-18 15:44:49,240 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:49,240 INFO L85 PathProgramCache]: Analyzing trace with hash -284428362, now seen corresponding path program 29 times [2022-01-18 15:44:49,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:49,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794353878] [2022-01-18 15:44:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:49,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:49,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:49,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794353878] [2022-01-18 15:44:49,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794353878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:49,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608371555] [2022-01-18 15:44:49,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:49,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:49,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:49,306 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) [2022-01-18 15:44:49,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 15:44:49,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:49,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:44:49,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:49,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:49,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-18 15:44:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:49,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:49,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:49,579 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 [2022-01-18 15:44:49,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:49,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:44:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:49,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608371555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:49,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:49,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-18 15:44:49,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147253183] [2022-01-18 15:44:49,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:49,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:44:49,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:49,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:44:49,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:49,594 INFO L87 Difference]: Start difference. First operand 2087 states and 8448 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2022-01-18 15:44:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:49,933 INFO L93 Difference]: Finished difference Result 2621 states and 10513 transitions. [2022-01-18 15:44:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:44:49,933 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 26 [2022-01-18 15:44:49,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:49,956 INFO L225 Difference]: With dead ends: 2621 [2022-01-18 15:44:49,956 INFO L226 Difference]: Without dead ends: 2548 [2022-01-18 15:44:49,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:49,956 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 155 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:49,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 102 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1033 Invalid, 0 Unknown, 209 Unchecked, 0.3s Time] [2022-01-18 15:44:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2022-01-18 15:44:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2049. [2022-01-18 15:44:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 4.060546875) internal successors, (8316), 2048 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 8316 transitions. [2022-01-18 15:44:49,983 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 8316 transitions. Word has length 26 [2022-01-18 15:44:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:49,983 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 8316 transitions. [2022-01-18 15:44:49,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2022-01-18 15:44:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 8316 transitions. [2022-01-18 15:44:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:49,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:49,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:50,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:50,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:50,197 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash 282474896, now seen corresponding path program 38 times [2022-01-18 15:44:50,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:50,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915689085] [2022-01-18 15:44:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:50,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:50,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:50,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915689085] [2022-01-18 15:44:50,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915689085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:50,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459675393] [2022-01-18 15:44:50,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:50,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:50,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:50,230 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) [2022-01-18 15:44:50,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 15:44:50,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:50,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:50,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:50,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:50,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:50,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459675393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:50,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:50,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:44:50,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148287279] [2022-01-18 15:44:50,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:50,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:44:50,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:50,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:44:50,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:44:50,387 INFO L87 Difference]: Start difference. First operand 2049 states and 8316 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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) [2022-01-18 15:44:50,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:50,756 INFO L93 Difference]: Finished difference Result 4488 states and 17097 transitions. [2022-01-18 15:44:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:44:50,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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 28 [2022-01-18 15:44:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:50,786 INFO L225 Difference]: With dead ends: 4488 [2022-01-18 15:44:50,786 INFO L226 Difference]: Without dead ends: 4287 [2022-01-18 15:44:50,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:44:50,787 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 315 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:50,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 236 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:44:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4287 states. [2022-01-18 15:44:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4287 to 2487. [2022-01-18 15:44:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 4.130329847144006) internal successors, (10268), 2486 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 10268 transitions. [2022-01-18 15:44:50,829 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 10268 transitions. Word has length 28 [2022-01-18 15:44:50,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:50,829 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 10268 transitions. [2022-01-18 15:44:50,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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) [2022-01-18 15:44:50,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 10268 transitions. [2022-01-18 15:44:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:50,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:50,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:50,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 15:44:51,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:51,035 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:51,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2029087123, now seen corresponding path program 39 times [2022-01-18 15:44:51,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:51,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287084888] [2022-01-18 15:44:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:51,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:51,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287084888] [2022-01-18 15:44:51,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287084888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:51,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465669689] [2022-01-18 15:44:51,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:51,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:51,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:51,055 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) [2022-01-18 15:44:51,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 15:44:51,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:44:51,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:51,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465669689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:51,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:51,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:44:51,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480568090] [2022-01-18 15:44:51,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:51,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:44:51,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:51,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:44:51,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:44:51,166 INFO L87 Difference]: Start difference. First operand 2487 states and 10268 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-01-18 15:44:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:51,388 INFO L93 Difference]: Finished difference Result 4535 states and 17654 transitions. [2022-01-18 15:44:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:44:51,388 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 28 [2022-01-18 15:44:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:51,396 INFO L225 Difference]: With dead ends: 4535 [2022-01-18 15:44:51,396 INFO L226 Difference]: Without dead ends: 4239 [2022-01-18 15:44:51,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:51,396 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 228 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:51,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 228 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:44:51,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2022-01-18 15:44:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 2661. [2022-01-18 15:44:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 4.141353383458647) internal successors, (11016), 2660 states have internal predecessors, (11016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 11016 transitions. [2022-01-18 15:44:51,442 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 11016 transitions. Word has length 28 [2022-01-18 15:44:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:51,442 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 11016 transitions. [2022-01-18 15:44:51,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-01-18 15:44:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 11016 transitions. [2022-01-18 15:44:51,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:51,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:51,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:51,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 15:44:51,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:51,661 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:51,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1294440930, now seen corresponding path program 40 times [2022-01-18 15:44:51,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:51,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155556729] [2022-01-18 15:44:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:51,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155556729] [2022-01-18 15:44:51,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155556729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621781130] [2022-01-18 15:44:51,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:51,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:51,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:51,676 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) [2022-01-18 15:44:51,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 15:44:51,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:51,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:51,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:51,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621781130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:51,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:51,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 15:44:51,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496021496] [2022-01-18 15:44:51,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:51,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:44:51,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:51,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:44:51,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:44:51,768 INFO L87 Difference]: Start difference. First operand 2661 states and 11016 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2022-01-18 15:44:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:51,939 INFO L93 Difference]: Finished difference Result 4469 states and 17528 transitions. [2022-01-18 15:44:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:44:51,939 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2022-01-18 15:44:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:51,947 INFO L225 Difference]: With dead ends: 4469 [2022-01-18 15:44:51,947 INFO L226 Difference]: Without dead ends: 4217 [2022-01-18 15:44:51,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:44:51,947 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 248 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:51,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 154 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:44:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4217 states. [2022-01-18 15:44:51,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4217 to 2991. [2022-01-18 15:44:51,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 4.197658862876255) internal successors, (12551), 2990 states have internal predecessors, (12551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 12551 transitions. [2022-01-18 15:44:51,998 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 12551 transitions. Word has length 28 [2022-01-18 15:44:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:51,998 INFO L470 AbstractCegarLoop]: Abstraction has 2991 states and 12551 transitions. [2022-01-18 15:44:51,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2022-01-18 15:44:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 12551 transitions. [2022-01-18 15:44:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:52,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:52,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:52,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-18 15:44:52,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:52,210 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:52,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:52,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1282810327, now seen corresponding path program 41 times [2022-01-18 15:44:52,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:52,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857956817] [2022-01-18 15:44:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:52,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:52,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857956817] [2022-01-18 15:44:52,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857956817] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11036888] [2022-01-18 15:44:52,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:52,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:52,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:52,235 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) [2022-01-18 15:44:52,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 15:44:52,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:44:52,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:52,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:52,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:52,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:52,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11036888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:52,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:52,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 15:44:52,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3525292] [2022-01-18 15:44:52,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:52,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:44:52,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:52,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:44:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:44:52,395 INFO L87 Difference]: Start difference. First operand 2991 states and 12551 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) [2022-01-18 15:44:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:52,690 INFO L93 Difference]: Finished difference Result 4487 states and 17874 transitions. [2022-01-18 15:44:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:44:52,690 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 28 [2022-01-18 15:44:52,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:52,700 INFO L225 Difference]: With dead ends: 4487 [2022-01-18 15:44:52,700 INFO L226 Difference]: Without dead ends: 4408 [2022-01-18 15:44:52,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:44:52,700 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 183 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:52,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 263 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:44:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2022-01-18 15:44:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 2986. [2022-01-18 15:44:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 4.19463986599665) internal successors, (12521), 2985 states have internal predecessors, (12521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 12521 transitions. [2022-01-18 15:44:52,753 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 12521 transitions. Word has length 28 [2022-01-18 15:44:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:52,753 INFO L470 AbstractCegarLoop]: Abstraction has 2986 states and 12521 transitions. [2022-01-18 15:44:52,753 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) [2022-01-18 15:44:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 12521 transitions. [2022-01-18 15:44:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:52,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:52,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:52,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:52,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:52,974 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:52,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:52,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2050841373, now seen corresponding path program 42 times [2022-01-18 15:44:52,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:52,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073076893] [2022-01-18 15:44:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:52,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:52,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:52,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073076893] [2022-01-18 15:44:52,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073076893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:52,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789916080] [2022-01-18 15:44:52,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:52,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:52,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:52,997 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) [2022-01-18 15:44:52,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 15:44:53,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:44:53,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:53,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:53,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:53,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:53,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789916080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:53,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:53,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:44:53,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974433961] [2022-01-18 15:44:53,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:53,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:44:53,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:53,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:44:53,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:44:53,112 INFO L87 Difference]: Start difference. First operand 2986 states and 12521 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-01-18 15:44:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:53,366 INFO L93 Difference]: Finished difference Result 6479 states and 25642 transitions. [2022-01-18 15:44:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:44:53,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2022-01-18 15:44:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:53,380 INFO L225 Difference]: With dead ends: 6479 [2022-01-18 15:44:53,380 INFO L226 Difference]: Without dead ends: 6271 [2022-01-18 15:44:53,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:44:53,381 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 372 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:53,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 176 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:44:53,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2022-01-18 15:44:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 3418. [2022-01-18 15:44:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3417 states have (on average 4.282996780801873) internal successors, (14635), 3417 states have internal predecessors, (14635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 14635 transitions. [2022-01-18 15:44:53,451 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 14635 transitions. Word has length 28 [2022-01-18 15:44:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:53,451 INFO L470 AbstractCegarLoop]: Abstraction has 3418 states and 14635 transitions. [2022-01-18 15:44:53,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-01-18 15:44:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 14635 transitions. [2022-01-18 15:44:53,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:53,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:53,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:53,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:53,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:53,671 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1361257656, now seen corresponding path program 43 times [2022-01-18 15:44:53,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636137655] [2022-01-18 15:44:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:53,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:53,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:53,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636137655] [2022-01-18 15:44:53,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636137655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:53,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907129112] [2022-01-18 15:44:53,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:53,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:53,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:53,693 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) [2022-01-18 15:44:53,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 15:44:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:53,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:53,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:53,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:53,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907129112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:53,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:53,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 15:44:53,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994390488] [2022-01-18 15:44:53,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:53,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:44:53,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:44:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:44:53,825 INFO L87 Difference]: Start difference. First operand 3418 states and 14635 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2022-01-18 15:44:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:54,004 INFO L93 Difference]: Finished difference Result 4773 states and 19438 transitions. [2022-01-18 15:44:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:44:54,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2022-01-18 15:44:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:54,015 INFO L225 Difference]: With dead ends: 4773 [2022-01-18 15:44:54,015 INFO L226 Difference]: Without dead ends: 4686 [2022-01-18 15:44:54,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:44:54,015 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 203 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:54,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 170 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:44:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2022-01-18 15:44:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3483. [2022-01-18 15:44:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3482 states have (on average 4.3170591614014935) internal successors, (15032), 3482 states have internal predecessors, (15032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 15032 transitions. [2022-01-18 15:44:54,083 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 15032 transitions. Word has length 28 [2022-01-18 15:44:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:54,083 INFO L470 AbstractCegarLoop]: Abstraction has 3483 states and 15032 transitions. [2022-01-18 15:44:54,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2022-01-18 15:44:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 15032 transitions. [2022-01-18 15:44:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:54,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:54,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:54,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:54,303 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,SelfDestructingSolverStorable145 [2022-01-18 15:44:54,303 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1447063027, now seen corresponding path program 44 times [2022-01-18 15:44:54,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:54,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343713205] [2022-01-18 15:44:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:54,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:54,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:54,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343713205] [2022-01-18 15:44:54,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343713205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:54,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060570781] [2022-01-18 15:44:54,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:54,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:54,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:54,328 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) [2022-01-18 15:44:54,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 15:44:54,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:54,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:54,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:54,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:54,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:54,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060570781] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:54,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:54,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 15:44:54,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937363913] [2022-01-18 15:44:54,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:54,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:44:54,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:54,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:44:54,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:44:54,473 INFO L87 Difference]: Start difference. First operand 3483 states and 15032 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) [2022-01-18 15:44:54,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:54,698 INFO L93 Difference]: Finished difference Result 6716 states and 27223 transitions. [2022-01-18 15:44:54,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:44:54,699 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 28 [2022-01-18 15:44:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:54,714 INFO L225 Difference]: With dead ends: 6716 [2022-01-18 15:44:54,715 INFO L226 Difference]: Without dead ends: 6597 [2022-01-18 15:44:54,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:44:54,715 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 294 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:54,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 156 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:44:54,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2022-01-18 15:44:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 3920. [2022-01-18 15:44:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.364378668027558) internal successors, (17104), 3919 states have internal predecessors, (17104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 17104 transitions. [2022-01-18 15:44:54,801 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 17104 transitions. Word has length 28 [2022-01-18 15:44:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:54,801 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 17104 transitions. [2022-01-18 15:44:54,801 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) [2022-01-18 15:44:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 17104 transitions. [2022-01-18 15:44:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:54,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:54,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:54,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:55,024 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,SelfDestructingSolverStorable146 [2022-01-18 15:44:55,025 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:55,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1768439914, now seen corresponding path program 45 times [2022-01-18 15:44:55,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:55,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353244891] [2022-01-18 15:44:55,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:55,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:55,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:55,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353244891] [2022-01-18 15:44:55,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353244891] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:55,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666997949] [2022-01-18 15:44:55,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:55,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:55,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:55,068 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) [2022-01-18 15:44:55,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 15:44:55,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:44:55,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:55,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:55,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:55,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:55,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666997949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:55,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:55,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:44:55,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566555913] [2022-01-18 15:44:55,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:55,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:44:55,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:55,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:44:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:44:55,182 INFO L87 Difference]: Start difference. First operand 3920 states and 17104 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:55,411 INFO L93 Difference]: Finished difference Result 6429 states and 25838 transitions. [2022-01-18 15:44:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:44:55,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:44:55,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:55,447 INFO L225 Difference]: With dead ends: 6429 [2022-01-18 15:44:55,447 INFO L226 Difference]: Without dead ends: 6333 [2022-01-18 15:44:55,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:55,448 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 297 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:55,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 179 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:44:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6333 states. [2022-01-18 15:44:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6333 to 4098. [2022-01-18 15:44:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 4.356602391994142) internal successors, (17849), 4097 states have internal predecessors, (17849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 17849 transitions. [2022-01-18 15:44:55,523 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 17849 transitions. Word has length 28 [2022-01-18 15:44:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:55,524 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 17849 transitions. [2022-01-18 15:44:55,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 17849 transitions. [2022-01-18 15:44:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:55,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:55,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:55,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-18 15:44:55,737 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,SelfDestructingSolverStorable147 [2022-01-18 15:44:55,738 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:55,738 INFO L85 PathProgramCache]: Analyzing trace with hash -21827687, now seen corresponding path program 46 times [2022-01-18 15:44:55,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:55,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259665626] [2022-01-18 15:44:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:55,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:55,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:55,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259665626] [2022-01-18 15:44:55,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259665626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:55,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167890175] [2022-01-18 15:44:55,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:55,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:55,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:55,764 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) [2022-01-18 15:44:55,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 15:44:55,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:55,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:55,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:55,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:55,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:55,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167890175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:55,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:55,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:44:55,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394599929] [2022-01-18 15:44:55,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:55,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:44:55,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:55,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:44:55,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:44:55,881 INFO L87 Difference]: Start difference. First operand 4098 states and 17849 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:56,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:56,045 INFO L93 Difference]: Finished difference Result 4931 states and 20941 transitions. [2022-01-18 15:44:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:44:56,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:44:56,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:56,057 INFO L225 Difference]: With dead ends: 4931 [2022-01-18 15:44:56,057 INFO L226 Difference]: Without dead ends: 4931 [2022-01-18 15:44:56,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:44:56,057 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:56,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 147 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:44:56,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2022-01-18 15:44:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 4050. [2022-01-18 15:44:56,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4050 states, 4049 states have (on average 4.345023462583354) internal successors, (17593), 4049 states have internal predecessors, (17593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4050 states to 4050 states and 17593 transitions. [2022-01-18 15:44:56,126 INFO L78 Accepts]: Start accepts. Automaton has 4050 states and 17593 transitions. Word has length 28 [2022-01-18 15:44:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:56,126 INFO L470 AbstractCegarLoop]: Abstraction has 4050 states and 17593 transitions. [2022-01-18 15:44:56,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4050 states and 17593 transitions. [2022-01-18 15:44:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:56,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:56,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:56,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-01-18 15:44:56,347 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,SelfDestructingSolverStorable148 [2022-01-18 15:44:56,347 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:56,347 INFO L85 PathProgramCache]: Analyzing trace with hash -756473880, now seen corresponding path program 47 times [2022-01-18 15:44:56,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:56,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991367444] [2022-01-18 15:44:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:56,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:56,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:56,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991367444] [2022-01-18 15:44:56,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991367444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:56,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684900164] [2022-01-18 15:44:56,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:56,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:56,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:56,373 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) [2022-01-18 15:44:56,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 15:44:56,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:44:56,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:56,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:56,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:56,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:56,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684900164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:56,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:56,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:44:56,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132046004] [2022-01-18 15:44:56,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:56,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:44:56,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:44:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:44:56,502 INFO L87 Difference]: Start difference. First operand 4050 states and 17593 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) [2022-01-18 15:44:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:56,769 INFO L93 Difference]: Finished difference Result 6820 states and 27594 transitions. [2022-01-18 15:44:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:44:56,769 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 28 [2022-01-18 15:44:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:56,783 INFO L225 Difference]: With dead ends: 6820 [2022-01-18 15:44:56,783 INFO L226 Difference]: Without dead ends: 6464 [2022-01-18 15:44:56,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:56,784 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 223 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:56,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 171 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:44:56,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6464 states. [2022-01-18 15:44:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6464 to 3958. [2022-01-18 15:44:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3958 states, 3957 states have (on average 4.323982815264089) internal successors, (17110), 3957 states have internal predecessors, (17110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3958 states to 3958 states and 17110 transitions. [2022-01-18 15:44:56,868 INFO L78 Accepts]: Start accepts. Automaton has 3958 states and 17110 transitions. Word has length 28 [2022-01-18 15:44:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:56,868 INFO L470 AbstractCegarLoop]: Abstraction has 3958 states and 17110 transitions. [2022-01-18 15:44:56,868 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) [2022-01-18 15:44:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3958 states and 17110 transitions. [2022-01-18 15:44:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:56,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:56,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:56,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:57,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:57,087 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1442852869, now seen corresponding path program 48 times [2022-01-18 15:44:57,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:57,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218947701] [2022-01-18 15:44:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:57,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:57,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:57,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218947701] [2022-01-18 15:44:57,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218947701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:57,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301981543] [2022-01-18 15:44:57,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:57,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:57,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:57,104 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) [2022-01-18 15:44:57,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 15:44:57,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:44:57,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:57,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:57,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:57,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:57,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301981543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:57,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:57,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:44:57,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339254609] [2022-01-18 15:44:57,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:57,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:44:57,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:57,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:44:57,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:44:57,270 INFO L87 Difference]: Start difference. First operand 3958 states and 17110 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 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) [2022-01-18 15:44:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:57,666 INFO L93 Difference]: Finished difference Result 5965 states and 24490 transitions. [2022-01-18 15:44:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:44:57,666 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 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 28 [2022-01-18 15:44:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:57,678 INFO L225 Difference]: With dead ends: 5965 [2022-01-18 15:44:57,679 INFO L226 Difference]: Without dead ends: 5890 [2022-01-18 15:44:57,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:44:57,679 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 236 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:57,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 221 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:44:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2022-01-18 15:44:57,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 4049. [2022-01-18 15:44:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4049 states, 4048 states have (on average 4.341403162055336) internal successors, (17574), 4048 states have internal predecessors, (17574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4049 states to 4049 states and 17574 transitions. [2022-01-18 15:44:57,747 INFO L78 Accepts]: Start accepts. Automaton has 4049 states and 17574 transitions. Word has length 28 [2022-01-18 15:44:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:57,747 INFO L470 AbstractCegarLoop]: Abstraction has 4049 states and 17574 transitions. [2022-01-18 15:44:57,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 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) [2022-01-18 15:44:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4049 states and 17574 transitions. [2022-01-18 15:44:57,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:57,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:57,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:57,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:57,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:57,961 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:57,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:57,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1026698434, now seen corresponding path program 49 times [2022-01-18 15:44:57,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:57,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855809792] [2022-01-18 15:44:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:57,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:57,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:57,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855809792] [2022-01-18 15:44:57,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855809792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:57,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196300420] [2022-01-18 15:44:57,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:57,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:57,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:57,984 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) [2022-01-18 15:44:57,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 15:44:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:58,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:58,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:58,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:58,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196300420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:58,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:58,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:44:58,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997064561] [2022-01-18 15:44:58,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:58,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:44:58,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:58,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:44:58,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:44:58,087 INFO L87 Difference]: Start difference. First operand 4049 states and 17574 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) [2022-01-18 15:44:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:58,319 INFO L93 Difference]: Finished difference Result 6450 states and 26051 transitions. [2022-01-18 15:44:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:44:58,319 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 28 [2022-01-18 15:44:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:58,333 INFO L225 Difference]: With dead ends: 6450 [2022-01-18 15:44:58,333 INFO L226 Difference]: Without dead ends: 6303 [2022-01-18 15:44:58,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:44:58,333 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 223 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:58,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 217 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:44:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2022-01-18 15:44:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 3931. [2022-01-18 15:44:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.367175572519084) internal successors, (17163), 3930 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 17163 transitions. [2022-01-18 15:44:58,413 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 17163 transitions. Word has length 28 [2022-01-18 15:44:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:58,413 INFO L470 AbstractCegarLoop]: Abstraction has 3931 states and 17163 transitions. [2022-01-18 15:44:58,413 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) [2022-01-18 15:44:58,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 17163 transitions. [2022-01-18 15:44:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:58,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:58,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:58,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 15:44:58,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:58,627 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1538135482, now seen corresponding path program 50 times [2022-01-18 15:44:58,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132903366] [2022-01-18 15:44:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:58,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:58,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:58,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132903366] [2022-01-18 15:44:58,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132903366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:58,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596812795] [2022-01-18 15:44:58,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:58,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:58,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:58,656 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) [2022-01-18 15:44:58,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 15:44:58,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:58,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:58,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:58,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:58,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:58,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596812795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:58,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:58,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 15:44:58,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994225] [2022-01-18 15:44:58,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:58,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 15:44:58,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 15:44:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:44:58,773 INFO L87 Difference]: Start difference. First operand 3931 states and 17163 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2022-01-18 15:44:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:58,916 INFO L93 Difference]: Finished difference Result 4651 states and 19943 transitions. [2022-01-18 15:44:58,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:44:58,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 28 [2022-01-18 15:44:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:58,926 INFO L225 Difference]: With dead ends: 4651 [2022-01-18 15:44:58,926 INFO L226 Difference]: Without dead ends: 4608 [2022-01-18 15:44:58,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:44:58,926 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 155 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:58,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 110 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:44:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2022-01-18 15:44:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 3920. [2022-01-18 15:44:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.372544016330696) internal successors, (17136), 3919 states have internal predecessors, (17136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 17136 transitions. [2022-01-18 15:44:58,988 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 17136 transitions. Word has length 28 [2022-01-18 15:44:58,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:58,989 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 17136 transitions. [2022-01-18 15:44:58,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2022-01-18 15:44:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 17136 transitions. [2022-01-18 15:44:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:58,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:58,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:59,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 15:44:59,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:59,210 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:59,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1133094263, now seen corresponding path program 51 times [2022-01-18 15:44:59,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:59,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602622120] [2022-01-18 15:44:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:59,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:59,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:59,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602622120] [2022-01-18 15:44:59,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602622120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:59,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184032012] [2022-01-18 15:44:59,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:59,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:59,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:59,228 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) [2022-01-18 15:44:59,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 15:44:59,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:44:59,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:59,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:59,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:59,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:59,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184032012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:59,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:59,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 15:44:59,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557059597] [2022-01-18 15:44:59,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:59,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 15:44:59,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:59,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 15:44:59,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:44:59,324 INFO L87 Difference]: Start difference. First operand 3920 states and 17136 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:59,447 INFO L93 Difference]: Finished difference Result 5024 states and 21476 transitions. [2022-01-18 15:44:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:44:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:44:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:59,457 INFO L225 Difference]: With dead ends: 5024 [2022-01-18 15:44:59,457 INFO L226 Difference]: Without dead ends: 5024 [2022-01-18 15:44:59,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:44:59,458 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 113 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:59,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 118 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:44:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5024 states. [2022-01-18 15:44:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5024 to 3892. [2022-01-18 15:44:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3892 states, 3891 states have (on average 4.382677974813673) internal successors, (17053), 3891 states have internal predecessors, (17053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3892 states to 3892 states and 17053 transitions. [2022-01-18 15:44:59,538 INFO L78 Accepts]: Start accepts. Automaton has 3892 states and 17053 transitions. Word has length 28 [2022-01-18 15:44:59,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:59,538 INFO L470 AbstractCegarLoop]: Abstraction has 3892 states and 17053 transitions. [2022-01-18 15:44:59,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3892 states and 17053 transitions. [2022-01-18 15:44:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:44:59,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:59,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:59,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:59,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:59,759 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:44:59,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:59,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2139044652, now seen corresponding path program 52 times [2022-01-18 15:44:59,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:59,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922338636] [2022-01-18 15:44:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:59,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:59,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:59,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922338636] [2022-01-18 15:44:59,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922338636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:59,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463266794] [2022-01-18 15:44:59,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:59,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:59,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:59,776 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) [2022-01-18 15:44:59,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 15:44:59,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:59,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:59,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:44:59,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:59,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:59,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463266794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:59,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:59,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:44:59,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951557364] [2022-01-18 15:44:59,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:59,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:44:59,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:59,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:44:59,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:44:59,876 INFO L87 Difference]: Start difference. First operand 3892 states and 17053 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-01-18 15:45:00,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:00,104 INFO L93 Difference]: Finished difference Result 6236 states and 25216 transitions. [2022-01-18 15:45:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:45:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 28 [2022-01-18 15:45:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:00,117 INFO L225 Difference]: With dead ends: 6236 [2022-01-18 15:45:00,117 INFO L226 Difference]: Without dead ends: 5996 [2022-01-18 15:45:00,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:45:00,118 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 392 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:00,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 164 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:45:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2022-01-18 15:45:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 3845. [2022-01-18 15:45:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3845 states, 3844 states have (on average 4.412591050988554) internal successors, (16962), 3844 states have internal predecessors, (16962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 16962 transitions. [2022-01-18 15:45:00,192 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 16962 transitions. Word has length 28 [2022-01-18 15:45:00,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:00,192 INFO L470 AbstractCegarLoop]: Abstraction has 3845 states and 16962 transitions. [2022-01-18 15:45:00,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-01-18 15:45:00,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 16962 transitions. [2022-01-18 15:45:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:00,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:00,198 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, 1, 1, 1, 1] [2022-01-18 15:45:00,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:00,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:00,403 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:00,404 INFO L85 PathProgramCache]: Analyzing trace with hash -409310417, now seen corresponding path program 53 times [2022-01-18 15:45:00,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:00,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626530104] [2022-01-18 15:45:00,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:00,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:00,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:00,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626530104] [2022-01-18 15:45:00,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626530104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:00,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626183970] [2022-01-18 15:45:00,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:00,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:00,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:00,428 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) [2022-01-18 15:45:00,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 15:45:00,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:45:00,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:00,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:00,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:00,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626183970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:00,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:00,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:45:00,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001419550] [2022-01-18 15:45:00,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:00,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:45:00,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:45:00,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:45:00,532 INFO L87 Difference]: Start difference. First operand 3845 states and 16962 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:00,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:00,732 INFO L93 Difference]: Finished difference Result 5643 states and 23426 transitions. [2022-01-18 15:45:00,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:45:00,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:45:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:00,743 INFO L225 Difference]: With dead ends: 5643 [2022-01-18 15:45:00,743 INFO L226 Difference]: Without dead ends: 5347 [2022-01-18 15:45:00,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:45:00,744 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 197 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:00,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 227 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:45:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5347 states. [2022-01-18 15:45:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5347 to 3834. [2022-01-18 15:45:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3834 states, 3833 states have (on average 4.445343073310723) internal successors, (17039), 3833 states have internal predecessors, (17039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 17039 transitions. [2022-01-18 15:45:00,810 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 17039 transitions. Word has length 28 [2022-01-18 15:45:00,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:00,810 INFO L470 AbstractCegarLoop]: Abstraction has 3834 states and 17039 transitions. [2022-01-18 15:45:00,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:00,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 17039 transitions. [2022-01-18 15:45:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:00,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:00,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:00,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-18 15:45:01,029 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,SelfDestructingSolverStorable155 [2022-01-18 15:45:01,029 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:01,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:01,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1143956610, now seen corresponding path program 54 times [2022-01-18 15:45:01,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:01,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401480941] [2022-01-18 15:45:01,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:01,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:01,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:01,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401480941] [2022-01-18 15:45:01,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401480941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:01,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623636247] [2022-01-18 15:45:01,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:01,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:01,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:01,062 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) [2022-01-18 15:45:01,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 15:45:01,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:45:01,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:01,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:01,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:01,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:01,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623636247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:01,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:01,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 15:45:01,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181788841] [2022-01-18 15:45:01,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:01,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:45:01,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:01,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:45:01,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:45:01,241 INFO L87 Difference]: Start difference. First operand 3834 states and 17039 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2022-01-18 15:45:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:01,480 INFO L93 Difference]: Finished difference Result 6713 states and 27548 transitions. [2022-01-18 15:45:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:45:01,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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 28 [2022-01-18 15:45:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:01,494 INFO L225 Difference]: With dead ends: 6713 [2022-01-18 15:45:01,495 INFO L226 Difference]: Without dead ends: 6433 [2022-01-18 15:45:01,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:45:01,495 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 340 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:01,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 133 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:45:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2022-01-18 15:45:01,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 3992. [2022-01-18 15:45:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3991 states have (on average 4.463292407917815) internal successors, (17813), 3991 states have internal predecessors, (17813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 17813 transitions. [2022-01-18 15:45:01,598 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 17813 transitions. Word has length 28 [2022-01-18 15:45:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:01,598 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 17813 transitions. [2022-01-18 15:45:01,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2022-01-18 15:45:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 17813 transitions. [2022-01-18 15:45:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:01,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:01,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:01,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:01,819 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,SelfDestructingSolverStorable156 [2022-01-18 15:45:01,819 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash 573759429, now seen corresponding path program 55 times [2022-01-18 15:45:01,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:01,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044298250] [2022-01-18 15:45:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:01,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:01,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:01,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044298250] [2022-01-18 15:45:01,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044298250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:01,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758884688] [2022-01-18 15:45:01,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:01,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:01,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:01,860 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) [2022-01-18 15:45:01,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 15:45:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:01,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:01,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:01,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:02,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758884688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:02,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:02,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 15:45:02,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955921787] [2022-01-18 15:45:02,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:02,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:45:02,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:02,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:45:02,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:45:02,005 INFO L87 Difference]: Start difference. First operand 3992 states and 17813 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:02,293 INFO L93 Difference]: Finished difference Result 5143 states and 21875 transitions. [2022-01-18 15:45:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:45:02,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 15:45:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:02,304 INFO L225 Difference]: With dead ends: 5143 [2022-01-18 15:45:02,305 INFO L226 Difference]: Without dead ends: 5064 [2022-01-18 15:45:02,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:45:02,305 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 178 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:02,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 206 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:45:02,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2022-01-18 15:45:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 3723. [2022-01-18 15:45:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 3722 states have (on average 4.434443847393874) internal successors, (16505), 3722 states have internal predecessors, (16505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 16505 transitions. [2022-01-18 15:45:02,371 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 16505 transitions. Word has length 28 [2022-01-18 15:45:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:02,371 INFO L470 AbstractCegarLoop]: Abstraction has 3723 states and 16505 transitions. [2022-01-18 15:45:02,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 16505 transitions. [2022-01-18 15:45:02,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:02,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:02,377 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:02,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:02,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 15:45:02,593 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash -387556167, now seen corresponding path program 56 times [2022-01-18 15:45:02,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:02,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956611985] [2022-01-18 15:45:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:02,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:02,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956611985] [2022-01-18 15:45:02,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956611985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282528857] [2022-01-18 15:45:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:02,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:02,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:02,614 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) [2022-01-18 15:45:02,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 15:45:02,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:02,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:02,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:02,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:02,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:02,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282528857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:02,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:02,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:45:02,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835354] [2022-01-18 15:45:02,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:02,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:45:02,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:02,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:45:02,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:45:02,762 INFO L87 Difference]: Start difference. First operand 3723 states and 16505 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2022-01-18 15:45:03,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:03,052 INFO L93 Difference]: Finished difference Result 6572 states and 27482 transitions. [2022-01-18 15:45:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:45:03,052 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2022-01-18 15:45:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:03,067 INFO L225 Difference]: With dead ends: 6572 [2022-01-18 15:45:03,068 INFO L226 Difference]: Without dead ends: 6342 [2022-01-18 15:45:03,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:45:03,068 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 262 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:03,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 215 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:45:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2022-01-18 15:45:03,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 3945. [2022-01-18 15:45:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 4.505324543610548) internal successors, (17769), 3944 states have internal predecessors, (17769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 17769 transitions. [2022-01-18 15:45:03,153 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 17769 transitions. Word has length 28 [2022-01-18 15:45:03,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:03,153 INFO L470 AbstractCegarLoop]: Abstraction has 3945 states and 17769 transitions. [2022-01-18 15:45:03,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2022-01-18 15:45:03,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 17769 transitions. [2022-01-18 15:45:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:03,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:03,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:03,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:03,371 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,SelfDestructingSolverStorable158 [2022-01-18 15:45:03,371 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1077139884, now seen corresponding path program 57 times [2022-01-18 15:45:03,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:03,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241088788] [2022-01-18 15:45:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:03,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:03,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:03,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241088788] [2022-01-18 15:45:03,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241088788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:03,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557833646] [2022-01-18 15:45:03,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:03,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:03,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:03,392 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) [2022-01-18 15:45:03,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 15:45:03,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:45:03,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:03,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:03,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:03,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557833646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:03,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:03,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 15:45:03,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967155219] [2022-01-18 15:45:03,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:03,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:45:03,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:45:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:45:03,536 INFO L87 Difference]: Start difference. First operand 3945 states and 17769 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2022-01-18 15:45:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:03,885 INFO L93 Difference]: Finished difference Result 5593 states and 23559 transitions. [2022-01-18 15:45:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:45:03,885 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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 28 [2022-01-18 15:45:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:03,897 INFO L225 Difference]: With dead ends: 5593 [2022-01-18 15:45:03,897 INFO L226 Difference]: Without dead ends: 5500 [2022-01-18 15:45:03,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:03,898 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 210 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:03,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 184 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:45:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5500 states. [2022-01-18 15:45:03,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5500 to 3854. [2022-01-18 15:45:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3854 states, 3853 states have (on average 4.518037892551258) internal successors, (17408), 3853 states have internal predecessors, (17408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 17408 transitions. [2022-01-18 15:45:03,970 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 17408 transitions. Word has length 28 [2022-01-18 15:45:03,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:03,970 INFO L470 AbstractCegarLoop]: Abstraction has 3854 states and 17408 transitions. [2022-01-18 15:45:03,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2022-01-18 15:45:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 17408 transitions. [2022-01-18 15:45:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:03,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:03,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:03,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:04,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:04,192 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:04,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:04,192 INFO L85 PathProgramCache]: Analyzing trace with hash 409506729, now seen corresponding path program 58 times [2022-01-18 15:45:04,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:04,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212386368] [2022-01-18 15:45:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:04,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:04,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:04,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212386368] [2022-01-18 15:45:04,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212386368] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:04,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038632522] [2022-01-18 15:45:04,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:04,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:04,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:04,212 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) [2022-01-18 15:45:04,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 15:45:04,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:04,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:04,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:04,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:04,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:04,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038632522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:04,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:04,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 15:45:04,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248512257] [2022-01-18 15:45:04,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:04,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:45:04,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:45:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:45:04,304 INFO L87 Difference]: Start difference. First operand 3854 states and 17408 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2022-01-18 15:45:04,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:04,467 INFO L93 Difference]: Finished difference Result 6639 states and 28252 transitions. [2022-01-18 15:45:04,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:45:04,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2022-01-18 15:45:04,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:04,484 INFO L225 Difference]: With dead ends: 6639 [2022-01-18 15:45:04,484 INFO L226 Difference]: Without dead ends: 6520 [2022-01-18 15:45:04,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:45:04,484 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 209 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:04,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 157 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:45:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2022-01-18 15:45:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 3611. [2022-01-18 15:45:04,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 3610 states have (on average 4.4673130193905815) internal successors, (16127), 3610 states have internal predecessors, (16127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 16127 transitions. [2022-01-18 15:45:04,567 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 16127 transitions. Word has length 28 [2022-01-18 15:45:04,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:04,567 INFO L470 AbstractCegarLoop]: Abstraction has 3611 states and 16127 transitions. [2022-01-18 15:45:04,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2022-01-18 15:45:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 16127 transitions. [2022-01-18 15:45:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:04,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:04,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:04,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:04,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-01-18 15:45:04,788 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:04,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:04,788 INFO L85 PathProgramCache]: Analyzing trace with hash -485045616, now seen corresponding path program 59 times [2022-01-18 15:45:04,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:04,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342582541] [2022-01-18 15:45:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:04,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:04,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:04,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342582541] [2022-01-18 15:45:04,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342582541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:04,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876415912] [2022-01-18 15:45:04,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:04,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:04,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:04,807 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) [2022-01-18 15:45:04,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 15:45:04,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:45:04,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:04,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:04,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:04,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:04,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876415912] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:04,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:04,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 15:45:04,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205457949] [2022-01-18 15:45:04,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:04,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 15:45:04,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:04,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 15:45:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:45:04,929 INFO L87 Difference]: Start difference. First operand 3611 states and 16127 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2022-01-18 15:45:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:05,106 INFO L93 Difference]: Finished difference Result 4871 states and 21135 transitions. [2022-01-18 15:45:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:45:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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 28 [2022-01-18 15:45:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:05,116 INFO L225 Difference]: With dead ends: 4871 [2022-01-18 15:45:05,117 INFO L226 Difference]: Without dead ends: 4871 [2022-01-18 15:45:05,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:45:05,117 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 119 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:05,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 82 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:45:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2022-01-18 15:45:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 3533. [2022-01-18 15:45:05,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 3532 states have (on average 4.499150622876557) internal successors, (15891), 3532 states have internal predecessors, (15891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 15891 transitions. [2022-01-18 15:45:05,176 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 15891 transitions. Word has length 28 [2022-01-18 15:45:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:05,176 INFO L470 AbstractCegarLoop]: Abstraction has 3533 states and 15891 transitions. [2022-01-18 15:45:05,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2022-01-18 15:45:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 15891 transitions. [2022-01-18 15:45:05,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:05,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:05,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:05,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:05,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:05,397 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:05,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:05,397 INFO L85 PathProgramCache]: Analyzing trace with hash 264684393, now seen corresponding path program 60 times [2022-01-18 15:45:05,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:05,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425374800] [2022-01-18 15:45:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:05,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:05,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425374800] [2022-01-18 15:45:05,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425374800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011783677] [2022-01-18 15:45:05,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:05,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:05,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:05,420 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) [2022-01-18 15:45:05,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 15:45:05,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:45:05,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:05,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:05,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:05,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:05,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011783677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:05,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:05,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 15:45:05,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772123306] [2022-01-18 15:45:05,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:05,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 15:45:05,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 15:45:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:45:05,538 INFO L87 Difference]: Start difference. First operand 3533 states and 15891 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 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) [2022-01-18 15:45:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:05,703 INFO L93 Difference]: Finished difference Result 4507 states and 19560 transitions. [2022-01-18 15:45:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:45:05,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 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 28 [2022-01-18 15:45:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:05,715 INFO L225 Difference]: With dead ends: 4507 [2022-01-18 15:45:05,715 INFO L226 Difference]: Without dead ends: 4386 [2022-01-18 15:45:05,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:45:05,715 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 149 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:05,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 134 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:45:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2022-01-18 15:45:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3531. [2022-01-18 15:45:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 4.497733711048158) internal successors, (15877), 3530 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 15877 transitions. [2022-01-18 15:45:05,801 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 15877 transitions. Word has length 28 [2022-01-18 15:45:05,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:05,801 INFO L470 AbstractCegarLoop]: Abstraction has 3531 states and 15877 transitions. [2022-01-18 15:45:05,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 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) [2022-01-18 15:45:05,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 15877 transitions. [2022-01-18 15:45:05,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:05,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:05,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:05,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:06,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:06,022 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:06,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1308166254, now seen corresponding path program 61 times [2022-01-18 15:45:06,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:06,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868098996] [2022-01-18 15:45:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:06,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:06,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:06,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868098996] [2022-01-18 15:45:06,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868098996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:06,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630229447] [2022-01-18 15:45:06,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:06,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:06,068 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) [2022-01-18 15:45:06,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 15:45:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:06,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:06,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:06,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:06,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630229447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:06,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:06,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:45:06,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337870125] [2022-01-18 15:45:06,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:06,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:45:06,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:06,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:45:06,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:45:06,237 INFO L87 Difference]: Start difference. First operand 3531 states and 15877 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) [2022-01-18 15:45:06,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:06,492 INFO L93 Difference]: Finished difference Result 4381 states and 19028 transitions. [2022-01-18 15:45:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:45:06,493 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 28 [2022-01-18 15:45:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:06,503 INFO L225 Difference]: With dead ends: 4381 [2022-01-18 15:45:06,504 INFO L226 Difference]: Without dead ends: 4381 [2022-01-18 15:45:06,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:45:06,504 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 180 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:06,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 156 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:45:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2022-01-18 15:45:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 3651. [2022-01-18 15:45:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 3650 states have (on average 4.494520547945205) internal successors, (16405), 3650 states have internal predecessors, (16405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 16405 transitions. [2022-01-18 15:45:06,567 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 16405 transitions. Word has length 28 [2022-01-18 15:45:06,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:06,568 INFO L470 AbstractCegarLoop]: Abstraction has 3651 states and 16405 transitions. [2022-01-18 15:45:06,568 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) [2022-01-18 15:45:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 16405 transitions. [2022-01-18 15:45:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:06,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:06,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:06,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-18 15:45:06,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:06,790 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2125209807, now seen corresponding path program 62 times [2022-01-18 15:45:06,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:06,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260326944] [2022-01-18 15:45:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:06,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:06,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260326944] [2022-01-18 15:45:06,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260326944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757458469] [2022-01-18 15:45:06,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:06,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:06,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:06,812 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) [2022-01-18 15:45:06,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 15:45:06,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:06,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:06,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:06,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:06,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:06,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757458469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:06,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:06,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:45:06,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698858119] [2022-01-18 15:45:06,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:06,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:45:06,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:06,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:45:06,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:45:06,950 INFO L87 Difference]: Start difference. First operand 3651 states and 16405 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) [2022-01-18 15:45:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:07,240 INFO L93 Difference]: Finished difference Result 5662 states and 23795 transitions. [2022-01-18 15:45:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:45:07,241 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 28 [2022-01-18 15:45:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:07,254 INFO L225 Difference]: With dead ends: 5662 [2022-01-18 15:45:07,254 INFO L226 Difference]: Without dead ends: 5558 [2022-01-18 15:45:07,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:07,255 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 263 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:07,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 158 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:45:07,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5558 states. [2022-01-18 15:45:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5558 to 3708. [2022-01-18 15:45:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 4.506069598057729) internal successors, (16704), 3707 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 16704 transitions. [2022-01-18 15:45:07,327 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 16704 transitions. Word has length 28 [2022-01-18 15:45:07,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:07,327 INFO L470 AbstractCegarLoop]: Abstraction has 3708 states and 16704 transitions. [2022-01-18 15:45:07,327 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) [2022-01-18 15:45:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 16704 transitions. [2022-01-18 15:45:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:07,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:07,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:07,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-01-18 15:45:07,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:07,535 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1450922654, now seen corresponding path program 63 times [2022-01-18 15:45:07,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:07,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769896357] [2022-01-18 15:45:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:07,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:07,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769896357] [2022-01-18 15:45:07,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769896357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:07,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877199836] [2022-01-18 15:45:07,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:07,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:07,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:07,556 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) [2022-01-18 15:45:07,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 15:45:07,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:45:07,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:07,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:07,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:07,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877199836] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:07,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:07,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:45:07,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113281280] [2022-01-18 15:45:07,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:07,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:45:07,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:07,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:45:07,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:45:07,687 INFO L87 Difference]: Start difference. First operand 3708 states and 16704 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) [2022-01-18 15:45:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:07,899 INFO L93 Difference]: Finished difference Result 5802 states and 24222 transitions. [2022-01-18 15:45:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:45:07,899 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 28 [2022-01-18 15:45:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:07,912 INFO L225 Difference]: With dead ends: 5802 [2022-01-18 15:45:07,913 INFO L226 Difference]: Without dead ends: 5550 [2022-01-18 15:45:07,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:45:07,913 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 261 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:07,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 141 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:45:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2022-01-18 15:45:07,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 3996. [2022-01-18 15:45:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 4.518648310387985) internal successors, (18052), 3995 states have internal predecessors, (18052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 18052 transitions. [2022-01-18 15:45:08,027 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 18052 transitions. Word has length 28 [2022-01-18 15:45:08,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:08,027 INFO L470 AbstractCegarLoop]: Abstraction has 3996 states and 18052 transitions. [2022-01-18 15:45:08,027 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) [2022-01-18 15:45:08,027 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 18052 transitions. [2022-01-18 15:45:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:08,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:08,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:08,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:08,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:08,259 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1107510849, now seen corresponding path program 64 times [2022-01-18 15:45:08,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:08,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122756059] [2022-01-18 15:45:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:08,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:08,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:08,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122756059] [2022-01-18 15:45:08,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122756059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:08,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352138230] [2022-01-18 15:45:08,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:08,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:08,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:08,282 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) [2022-01-18 15:45:08,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 15:45:08,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:08,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:08,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:08,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:08,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:08,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352138230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:08,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:08,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:45:08,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585020799] [2022-01-18 15:45:08,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:08,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:45:08,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:45:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:45:08,411 INFO L87 Difference]: Start difference. First operand 3996 states and 18052 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) [2022-01-18 15:45:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:08,707 INFO L93 Difference]: Finished difference Result 7825 states and 33142 transitions. [2022-01-18 15:45:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:45:08,707 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 28 [2022-01-18 15:45:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:08,725 INFO L225 Difference]: With dead ends: 7825 [2022-01-18 15:45:08,725 INFO L226 Difference]: Without dead ends: 7735 [2022-01-18 15:45:08,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:45:08,726 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 358 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:08,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 143 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:45:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7735 states. [2022-01-18 15:45:08,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7735 to 4578. [2022-01-18 15:45:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 4.544242953899935) internal successors, (20799), 4577 states have internal predecessors, (20799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 20799 transitions. [2022-01-18 15:45:08,823 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 20799 transitions. Word has length 28 [2022-01-18 15:45:08,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:08,823 INFO L470 AbstractCegarLoop]: Abstraction has 4578 states and 20799 transitions. [2022-01-18 15:45:08,823 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) [2022-01-18 15:45:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 20799 transitions. [2022-01-18 15:45:08,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:08,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:08,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:08,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:09,046 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,SelfDestructingSolverStorable166 [2022-01-18 15:45:09,047 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:09,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2118492596, now seen corresponding path program 65 times [2022-01-18 15:45:09,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:09,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334144267] [2022-01-18 15:45:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:09,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:09,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:09,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334144267] [2022-01-18 15:45:09,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334144267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:09,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485731204] [2022-01-18 15:45:09,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:09,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:09,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:09,074 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) [2022-01-18 15:45:09,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 15:45:09,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:45:09,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:09,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:09,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:09,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485731204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:09,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:09,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:45:09,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010083321] [2022-01-18 15:45:09,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:09,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:45:09,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:09,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:45:09,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:45:09,234 INFO L87 Difference]: Start difference. First operand 4578 states and 20799 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) [2022-01-18 15:45:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:09,550 INFO L93 Difference]: Finished difference Result 5599 states and 24278 transitions. [2022-01-18 15:45:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:45:09,550 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 28 [2022-01-18 15:45:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:09,563 INFO L225 Difference]: With dead ends: 5599 [2022-01-18 15:45:09,563 INFO L226 Difference]: Without dead ends: 5516 [2022-01-18 15:45:09,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:45:09,564 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 199 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:09,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 173 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:45:09,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2022-01-18 15:45:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4395. [2022-01-18 15:45:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4395 states, 4394 states have (on average 4.547792444242148) internal successors, (19983), 4394 states have internal predecessors, (19983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4395 states to 4395 states and 19983 transitions. [2022-01-18 15:45:09,644 INFO L78 Accepts]: Start accepts. Automaton has 4395 states and 19983 transitions. Word has length 28 [2022-01-18 15:45:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:09,644 INFO L470 AbstractCegarLoop]: Abstraction has 4395 states and 19983 transitions. [2022-01-18 15:45:09,644 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) [2022-01-18 15:45:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 4395 states and 19983 transitions. [2022-01-18 15:45:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 15:45:09,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:09,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:09,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:09,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:09,867 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:09,867 INFO L85 PathProgramCache]: Analyzing trace with hash -631845983, now seen corresponding path program 66 times [2022-01-18 15:45:09,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:09,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415222035] [2022-01-18 15:45:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:09,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:09,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:09,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415222035] [2022-01-18 15:45:09,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415222035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:09,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968220687] [2022-01-18 15:45:09,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:09,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:09,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:09,888 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) [2022-01-18 15:45:09,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 15:45:09,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:45:09,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:09,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:45:09,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:09,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:10,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968220687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:10,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:10,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:45:10,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716367616] [2022-01-18 15:45:10,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:10,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:45:10,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:10,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:45:10,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:45:10,042 INFO L87 Difference]: Start difference. First operand 4395 states and 19983 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) [2022-01-18 15:45:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:10,244 INFO L93 Difference]: Finished difference Result 7306 states and 31184 transitions. [2022-01-18 15:45:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:45:10,245 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 28 [2022-01-18 15:45:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:10,261 INFO L225 Difference]: With dead ends: 7306 [2022-01-18 15:45:10,261 INFO L226 Difference]: Without dead ends: 7173 [2022-01-18 15:45:10,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:45:10,262 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 202 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:10,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 177 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:45:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7173 states. [2022-01-18 15:45:10,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7173 to 4142. [2022-01-18 15:45:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4142 states, 4141 states have (on average 4.544071480318763) internal successors, (18817), 4141 states have internal predecessors, (18817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4142 states to 4142 states and 18817 transitions. [2022-01-18 15:45:10,370 INFO L78 Accepts]: Start accepts. Automaton has 4142 states and 18817 transitions. Word has length 28 [2022-01-18 15:45:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:10,370 INFO L470 AbstractCegarLoop]: Abstraction has 4142 states and 18817 transitions. [2022-01-18 15:45:10,370 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) [2022-01-18 15:45:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 4142 states and 18817 transitions. [2022-01-18 15:45:10,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:10,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:10,377 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:10,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-01-18 15:45:10,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:10,582 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:10,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:10,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1737203471, now seen corresponding path program 67 times [2022-01-18 15:45:10,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:10,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433843940] [2022-01-18 15:45:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:10,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:10,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:10,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433843940] [2022-01-18 15:45:10,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433843940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:10,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784334214] [2022-01-18 15:45:10,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:10,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:10,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:10,774 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) [2022-01-18 15:45:10,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 15:45:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:10,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:45:10,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:11,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:11,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:11,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:11,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:45:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:11,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:11,394 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:45:11,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:45:11,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:11,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:11,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:11,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:11,472 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 25 treesize of output 3 [2022-01-18 15:45:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:11,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784334214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:11,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:11,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-01-18 15:45:11,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833835118] [2022-01-18 15:45:11,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:11,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:45:11,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:45:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:45:11,499 INFO L87 Difference]: Start difference. First operand 4142 states and 18817 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:12,937 INFO L93 Difference]: Finished difference Result 5478 states and 23821 transitions. [2022-01-18 15:45:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:45:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:12,950 INFO L225 Difference]: With dead ends: 5478 [2022-01-18 15:45:12,950 INFO L226 Difference]: Without dead ends: 5397 [2022-01-18 15:45:12,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:45:12,951 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 304 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 3641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1090 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:12,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 216 Invalid, 3641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2486 Invalid, 0 Unknown, 1090 Unchecked, 1.0s Time] [2022-01-18 15:45:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2022-01-18 15:45:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 4208. [2022-01-18 15:45:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4208 states, 4207 states have (on average 4.532683622533872) internal successors, (19069), 4207 states have internal predecessors, (19069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 19069 transitions. [2022-01-18 15:45:13,062 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 19069 transitions. Word has length 30 [2022-01-18 15:45:13,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:13,062 INFO L470 AbstractCegarLoop]: Abstraction has 4208 states and 19069 transitions. [2022-01-18 15:45:13,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:13,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 19069 transitions. [2022-01-18 15:45:13,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:13,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:13,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:13,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:13,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 15:45:13,283 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:13,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:13,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1848727534, now seen corresponding path program 1 times [2022-01-18 15:45:13,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:13,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328683460] [2022-01-18 15:45:13,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:13,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:13,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:13,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328683460] [2022-01-18 15:45:13,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328683460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:13,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448549659] [2022-01-18 15:45:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:13,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:13,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:13,539 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) [2022-01-18 15:45:13,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 15:45:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:45:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:13,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:13,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:13,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:13,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:45:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:13,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:14,240 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:45:14,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:45:14,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:14,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:14,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:14,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:14,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:45:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:14,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448549659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:14,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:14,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-01-18 15:45:14,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889199370] [2022-01-18 15:45:14,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:14,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:45:14,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:14,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:45:14,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:45:14,318 INFO L87 Difference]: Start difference. First operand 4208 states and 19069 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:15,369 INFO L93 Difference]: Finished difference Result 4811 states and 21445 transitions. [2022-01-18 15:45:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:45:15,369 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:15,380 INFO L225 Difference]: With dead ends: 4811 [2022-01-18 15:45:15,380 INFO L226 Difference]: Without dead ends: 4738 [2022-01-18 15:45:15,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:45:15,381 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 207 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 919 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:15,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 195 Invalid, 2867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1893 Invalid, 0 Unknown, 919 Unchecked, 0.7s Time] [2022-01-18 15:45:15,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2022-01-18 15:45:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 4224. [2022-01-18 15:45:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 4223 states have (on average 4.531139000710396) internal successors, (19135), 4223 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 19135 transitions. [2022-01-18 15:45:15,449 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 19135 transitions. Word has length 30 [2022-01-18 15:45:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:15,449 INFO L470 AbstractCegarLoop]: Abstraction has 4224 states and 19135 transitions. [2022-01-18 15:45:15,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 19135 transitions. [2022-01-18 15:45:15,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:15,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:15,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:15,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:15,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:15,661 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:15,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:15,661 INFO L85 PathProgramCache]: Analyzing trace with hash -456582988, now seen corresponding path program 2 times [2022-01-18 15:45:15,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:15,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222293623] [2022-01-18 15:45:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:15,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:15,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:15,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222293623] [2022-01-18 15:45:15,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222293623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:15,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504781378] [2022-01-18 15:45:15,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:15,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:15,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:15,865 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) [2022-01-18 15:45:15,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 15:45:15,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:15,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:15,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:45:15,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:16,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:16,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:16,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:16,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 15:45:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:16,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:16,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:16,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:16,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:16,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-01-18 15:45:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:17,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504781378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:17,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:17,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 33 [2022-01-18 15:45:17,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852201538] [2022-01-18 15:45:17,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:17,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:45:17,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:45:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:45:17,062 INFO L87 Difference]: Start difference. First operand 4224 states and 19135 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:18,811 INFO L93 Difference]: Finished difference Result 5644 states and 24147 transitions. [2022-01-18 15:45:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:45:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:18,823 INFO L225 Difference]: With dead ends: 5644 [2022-01-18 15:45:18,824 INFO L226 Difference]: Without dead ends: 5541 [2022-01-18 15:45:18,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=286, Invalid=2576, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:45:18,824 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 256 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 2661 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 3413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:18,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 244 Invalid, 3413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2661 Invalid, 0 Unknown, 674 Unchecked, 1.1s Time] [2022-01-18 15:45:18,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2022-01-18 15:45:18,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 4269. [2022-01-18 15:45:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4269 states, 4268 states have (on average 4.5220243673851925) internal successors, (19300), 4268 states have internal predecessors, (19300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4269 states to 4269 states and 19300 transitions. [2022-01-18 15:45:18,900 INFO L78 Accepts]: Start accepts. Automaton has 4269 states and 19300 transitions. Word has length 30 [2022-01-18 15:45:18,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:18,900 INFO L470 AbstractCegarLoop]: Abstraction has 4269 states and 19300 transitions. [2022-01-18 15:45:18,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:18,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4269 states and 19300 transitions. [2022-01-18 15:45:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:18,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:18,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:18,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:19,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-01-18 15:45:19,122 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash -962929254, now seen corresponding path program 3 times [2022-01-18 15:45:19,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:19,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006637315] [2022-01-18 15:45:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:19,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:19,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:19,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006637315] [2022-01-18 15:45:19,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006637315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:19,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262224918] [2022-01-18 15:45:19,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:19,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:19,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:19,338 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) [2022-01-18 15:45:19,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 15:45:19,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:45:19,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:19,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:45:19,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:19,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:19,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:19,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:19,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:45:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:19,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:20,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:20,290 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:45:20,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:45:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:20,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262224918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:20,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:20,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 29 [2022-01-18 15:45:20,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873227268] [2022-01-18 15:45:20,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:20,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:45:20,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:20,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:45:20,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:45:20,423 INFO L87 Difference]: Start difference. First operand 4269 states and 19300 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:21,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:21,516 INFO L93 Difference]: Finished difference Result 4894 states and 21545 transitions. [2022-01-18 15:45:21,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:45:21,517 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:21,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:21,528 INFO L225 Difference]: With dead ends: 4894 [2022-01-18 15:45:21,528 INFO L226 Difference]: Without dead ends: 4802 [2022-01-18 15:45:21,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:45:21,529 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 293 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1207 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:21,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 187 Invalid, 2706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1424 Invalid, 0 Unknown, 1207 Unchecked, 0.6s Time] [2022-01-18 15:45:21,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2022-01-18 15:45:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 4422. [2022-01-18 15:45:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4421 states have (on average 4.494684460529292) internal successors, (19871), 4421 states have internal predecessors, (19871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 19871 transitions. [2022-01-18 15:45:21,604 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 19871 transitions. Word has length 30 [2022-01-18 15:45:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:21,604 INFO L470 AbstractCegarLoop]: Abstraction has 4422 states and 19871 transitions. [2022-01-18 15:45:21,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 19871 transitions. [2022-01-18 15:45:21,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:21,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:21,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:21,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 15:45:21,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:21,815 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:21,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1537645614, now seen corresponding path program 4 times [2022-01-18 15:45:21,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:21,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428259916] [2022-01-18 15:45:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:21,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:22,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:22,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428259916] [2022-01-18 15:45:22,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428259916] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:22,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071817271] [2022-01-18 15:45:22,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:22,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:22,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:22,003 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) [2022-01-18 15:45:22,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 15:45:22,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:22,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:22,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:45:22,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:22,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:45:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:22,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:22,444 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:45:22,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:45:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:22,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071817271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:22,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:22,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:45:22,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718700148] [2022-01-18 15:45:22,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:22,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:45:22,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:22,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:45:22,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:45:22,524 INFO L87 Difference]: Start difference. First operand 4422 states and 19871 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:24,225 INFO L93 Difference]: Finished difference Result 6059 states and 26616 transitions. [2022-01-18 15:45:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:45:24,226 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:24,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:24,239 INFO L225 Difference]: With dead ends: 6059 [2022-01-18 15:45:24,239 INFO L226 Difference]: Without dead ends: 5978 [2022-01-18 15:45:24,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=342, Invalid=2208, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:45:24,240 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 398 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 3485 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 3740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 3485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:24,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 213 Invalid, 3740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 3485 Invalid, 0 Unknown, 115 Unchecked, 1.2s Time] [2022-01-18 15:45:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5978 states. [2022-01-18 15:45:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5978 to 4492. [2022-01-18 15:45:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4492 states, 4491 states have (on average 4.481629926519706) internal successors, (20127), 4491 states have internal predecessors, (20127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4492 states to 4492 states and 20127 transitions. [2022-01-18 15:45:24,317 INFO L78 Accepts]: Start accepts. Automaton has 4492 states and 20127 transitions. Word has length 30 [2022-01-18 15:45:24,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:24,317 INFO L470 AbstractCegarLoop]: Abstraction has 4492 states and 20127 transitions. [2022-01-18 15:45:24,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4492 states and 20127 transitions. [2022-01-18 15:45:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:24,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:24,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:24,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 15:45:24,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:24,539 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:24,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:24,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1649169677, now seen corresponding path program 27 times [2022-01-18 15:45:24,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:24,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767899510] [2022-01-18 15:45:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:24,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:24,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:24,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767899510] [2022-01-18 15:45:24,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767899510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:24,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017235860] [2022-01-18 15:45:24,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:24,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:24,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:24,762 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) [2022-01-18 15:45:24,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 15:45:24,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:45:24,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:24,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:45:24,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:25,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:25,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:25,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:45:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:25,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:25,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:25,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:25,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:25,386 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 26 treesize of output 57 [2022-01-18 15:45:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:25,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017235860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:25,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:25,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-01-18 15:45:25,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939722685] [2022-01-18 15:45:25,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:25,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:45:25,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:25,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:45:25,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:45:25,558 INFO L87 Difference]: Start difference. First operand 4492 states and 20127 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:28,155 INFO L93 Difference]: Finished difference Result 7430 states and 31438 transitions. [2022-01-18 15:45:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 15:45:28,155 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:28,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:28,173 INFO L225 Difference]: With dead ends: 7430 [2022-01-18 15:45:28,173 INFO L226 Difference]: Without dead ends: 7270 [2022-01-18 15:45:28,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=595, Invalid=4955, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 15:45:28,173 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 406 mSDsluCounter, 2813 mSDsCounter, 0 mSdLazyCounter, 3908 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 5860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 3908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1775 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:28,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 386 Invalid, 5860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 3908 Invalid, 0 Unknown, 1775 Unchecked, 1.4s Time] [2022-01-18 15:45:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7270 states. [2022-01-18 15:45:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7270 to 4735. [2022-01-18 15:45:28,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 4.437473595268272) internal successors, (21007), 4734 states have internal predecessors, (21007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 21007 transitions. [2022-01-18 15:45:28,268 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 21007 transitions. Word has length 30 [2022-01-18 15:45:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:28,268 INFO L470 AbstractCegarLoop]: Abstraction has 4735 states and 21007 transitions. [2022-01-18 15:45:28,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 21007 transitions. [2022-01-18 15:45:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:28,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:28,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:28,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:28,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:28,483 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:28,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:28,483 INFO L85 PathProgramCache]: Analyzing trace with hash 388388464, now seen corresponding path program 5 times [2022-01-18 15:45:28,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:28,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469584807] [2022-01-18 15:45:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:28,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:28,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:28,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469584807] [2022-01-18 15:45:28,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469584807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:28,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066351243] [2022-01-18 15:45:28,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:28,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:28,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:28,663 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) [2022-01-18 15:45:28,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 15:45:28,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:45:28,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:28,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:45:28,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:28,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:28,952 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 [2022-01-18 15:45:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:29,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:29,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:29,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:29,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:29,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:29,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 54 [2022-01-18 15:45:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:29,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066351243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:29,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:29,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 15:45:29,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623562293] [2022-01-18 15:45:29,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:29,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:45:29,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:45:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:45:29,431 INFO L87 Difference]: Start difference. First operand 4735 states and 21007 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:31,819 INFO L93 Difference]: Finished difference Result 7436 states and 31753 transitions. [2022-01-18 15:45:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 15:45:31,819 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:31,836 INFO L225 Difference]: With dead ends: 7436 [2022-01-18 15:45:31,836 INFO L226 Difference]: Without dead ends: 7100 [2022-01-18 15:45:31,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=494, Invalid=3046, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 15:45:31,837 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 368 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 3114 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 3538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:31,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 290 Invalid, 3538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3114 Invalid, 0 Unknown, 311 Unchecked, 1.3s Time] [2022-01-18 15:45:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7100 states. [2022-01-18 15:45:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7100 to 4992. [2022-01-18 15:45:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4992 states, 4991 states have (on average 4.397715888599479) internal successors, (21949), 4991 states have internal predecessors, (21949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4992 states to 4992 states and 21949 transitions. [2022-01-18 15:45:31,924 INFO L78 Accepts]: Start accepts. Automaton has 4992 states and 21949 transitions. Word has length 30 [2022-01-18 15:45:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:31,924 INFO L470 AbstractCegarLoop]: Abstraction has 4992 states and 21949 transitions. [2022-01-18 15:45:31,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 4992 states and 21949 transitions. [2022-01-18 15:45:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:31,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:31,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:31,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:32,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:32,139 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash -117957802, now seen corresponding path program 6 times [2022-01-18 15:45:32,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:32,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588290868] [2022-01-18 15:45:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:32,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:32,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:32,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588290868] [2022-01-18 15:45:32,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588290868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:32,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60011936] [2022-01-18 15:45:32,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:32,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:32,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:32,360 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) [2022-01-18 15:45:32,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 15:45:32,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:45:32,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:32,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:45:32,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:32,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:32,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:32,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:32,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 46 [2022-01-18 15:45:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:32,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:36,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:36,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:36,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:36,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:36,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 7 [2022-01-18 15:45:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:36,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60011936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:36,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:36,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:45:36,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955213842] [2022-01-18 15:45:36,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:36,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:45:36,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:45:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=817, Unknown=1, NotChecked=0, Total=930 [2022-01-18 15:45:36,070 INFO L87 Difference]: Start difference. First operand 4992 states and 21949 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:43,198 INFO L93 Difference]: Finished difference Result 6933 states and 29528 transitions. [2022-01-18 15:45:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 15:45:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:43,215 INFO L225 Difference]: With dead ends: 6933 [2022-01-18 15:45:43,215 INFO L226 Difference]: Without dead ends: 6926 [2022-01-18 15:45:43,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 15 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=399, Invalid=2569, Unknown=2, NotChecked=0, Total=2970 [2022-01-18 15:45:43,216 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 237 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1583 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:43,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 318 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1028 Invalid, 0 Unknown, 1583 Unchecked, 0.3s Time] [2022-01-18 15:45:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2022-01-18 15:45:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 5156. [2022-01-18 15:45:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5156 states, 5155 states have (on average 4.359262851600388) internal successors, (22472), 5155 states have internal predecessors, (22472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5156 states to 5156 states and 22472 transitions. [2022-01-18 15:45:43,303 INFO L78 Accepts]: Start accepts. Automaton has 5156 states and 22472 transitions. Word has length 30 [2022-01-18 15:45:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:43,303 INFO L470 AbstractCegarLoop]: Abstraction has 5156 states and 22472 transitions. [2022-01-18 15:45:43,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5156 states and 22472 transitions. [2022-01-18 15:45:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:43,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:43,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:43,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:43,526 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,SelfDestructingSolverStorable176 [2022-01-18 15:45:43,527 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash -89328651, now seen corresponding path program 1 times [2022-01-18 15:45:43,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:43,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364944345] [2022-01-18 15:45:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:43,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:43,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:43,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364944345] [2022-01-18 15:45:43,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364944345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:43,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701984851] [2022-01-18 15:45:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:43,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:43,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:43,725 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) [2022-01-18 15:45:43,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 15:45:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:43,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:45:43,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:43,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 15:45:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:44,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:44,214 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:45:44,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:45:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:44,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701984851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:44,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:44,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:45:44,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579614492] [2022-01-18 15:45:44,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:44,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:45:44,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:44,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:45:44,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:45:44,310 INFO L87 Difference]: Start difference. First operand 5156 states and 22472 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:46,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:46,357 INFO L93 Difference]: Finished difference Result 6735 states and 28977 transitions. [2022-01-18 15:45:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:45:46,357 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:46,373 INFO L225 Difference]: With dead ends: 6735 [2022-01-18 15:45:46,373 INFO L226 Difference]: Without dead ends: 6652 [2022-01-18 15:45:46,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=371, Invalid=2491, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:45:46,374 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 347 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 3757 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 3918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:46,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 215 Invalid, 3918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 3757 Invalid, 0 Unknown, 23 Unchecked, 1.4s Time] [2022-01-18 15:45:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6652 states. [2022-01-18 15:45:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6652 to 5001. [2022-01-18 15:45:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 5000 states have (on average 4.3982) internal successors, (21991), 5000 states have internal predecessors, (21991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:46,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 21991 transitions. [2022-01-18 15:45:46,461 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 21991 transitions. Word has length 30 [2022-01-18 15:45:46,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:46,461 INFO L470 AbstractCegarLoop]: Abstraction has 5001 states and 21991 transitions. [2022-01-18 15:45:46,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:46,461 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 21991 transitions. [2022-01-18 15:45:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:46,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:46,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:46,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:46,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:46,678 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:46,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:46,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1412566352, now seen corresponding path program 7 times [2022-01-18 15:45:46,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:46,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253426509] [2022-01-18 15:45:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:46,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:46,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:46,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253426509] [2022-01-18 15:45:46,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253426509] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:46,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360986533] [2022-01-18 15:45:46,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:46,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:46,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:46,928 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) [2022-01-18 15:45:46,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 15:45:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:46,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:45:46,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:47,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 15:45:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:47,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:47,442 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:45:47,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:45:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:47,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360986533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:47,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:47,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:45:47,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294795637] [2022-01-18 15:45:47,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:47,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:45:47,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:47,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:45:47,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:45:47,536 INFO L87 Difference]: Start difference. First operand 5001 states and 21991 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:49,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:49,292 INFO L93 Difference]: Finished difference Result 6597 states and 28573 transitions. [2022-01-18 15:45:49,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:45:49,292 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:49,307 INFO L225 Difference]: With dead ends: 6597 [2022-01-18 15:45:49,307 INFO L226 Difference]: Without dead ends: 6504 [2022-01-18 15:45:49,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:45:49,308 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 354 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:49,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 163 Invalid, 2968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2796 Invalid, 0 Unknown, 23 Unchecked, 1.2s Time] [2022-01-18 15:45:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6504 states. [2022-01-18 15:45:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6504 to 4795. [2022-01-18 15:45:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4795 states, 4794 states have (on average 4.434501460158532) internal successors, (21259), 4794 states have internal predecessors, (21259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4795 states to 4795 states and 21259 transitions. [2022-01-18 15:45:49,391 INFO L78 Accepts]: Start accepts. Automaton has 4795 states and 21259 transitions. Word has length 30 [2022-01-18 15:45:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:49,391 INFO L470 AbstractCegarLoop]: Abstraction has 4795 states and 21259 transitions. [2022-01-18 15:45:49,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4795 states and 21259 transitions. [2022-01-18 15:45:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:49,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:49,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:49,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:49,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-01-18 15:45:49,610 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:49,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:49,610 INFO L85 PathProgramCache]: Analyzing trace with hash -967117165, now seen corresponding path program 1 times [2022-01-18 15:45:49,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:49,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201722400] [2022-01-18 15:45:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:49,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:49,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:49,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201722400] [2022-01-18 15:45:49,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201722400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:49,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865885033] [2022-01-18 15:45:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:49,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:49,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:49,800 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) [2022-01-18 15:45:49,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 15:45:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:49,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:45:49,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:50,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:50,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:50,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:50,119 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 [2022-01-18 15:45:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:50,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:50,403 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:45:50,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:45:50,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:50,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:50,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:50,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:50,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:45:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:50,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865885033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:50,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:50,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-01-18 15:45:50,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703716443] [2022-01-18 15:45:50,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:50,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:45:50,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:50,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:45:50,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:45:50,463 INFO L87 Difference]: Start difference. First operand 4795 states and 21259 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:51,356 INFO L93 Difference]: Finished difference Result 5803 states and 25054 transitions. [2022-01-18 15:45:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:45:51,356 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:51,370 INFO L225 Difference]: With dead ends: 5803 [2022-01-18 15:45:51,371 INFO L226 Difference]: Without dead ends: 5722 [2022-01-18 15:45:51,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:45:51,371 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 211 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:51,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 189 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1852 Invalid, 0 Unknown, 354 Unchecked, 0.6s Time] [2022-01-18 15:45:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5722 states. [2022-01-18 15:45:51,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5722 to 4994. [2022-01-18 15:45:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4994 states, 4993 states have (on average 4.41377929100741) internal successors, (22038), 4993 states have internal predecessors, (22038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4994 states to 4994 states and 22038 transitions. [2022-01-18 15:45:51,498 INFO L78 Accepts]: Start accepts. Automaton has 4994 states and 22038 transitions. Word has length 30 [2022-01-18 15:45:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:51,498 INFO L470 AbstractCegarLoop]: Abstraction has 4994 states and 22038 transitions. [2022-01-18 15:45:51,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 4994 states and 22038 transitions. [2022-01-18 15:45:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:51,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:51,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:51,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-01-18 15:45:51,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-01-18 15:45:51,720 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash -732063226, now seen corresponding path program 8 times [2022-01-18 15:45:51,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:51,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898160617] [2022-01-18 15:45:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:51,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:51,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:51,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898160617] [2022-01-18 15:45:51,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898160617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:51,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586585712] [2022-01-18 15:45:51,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:51,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:51,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:51,942 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) [2022-01-18 15:45:51,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 15:45:51,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:51,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:51,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:52,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:52,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:52,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:52,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:52,210 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 30 treesize of output 48 [2022-01-18 15:45:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:52,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:52,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:52,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:52,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:52,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:52,657 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:45:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:52,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586585712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:52,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:52,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-01-18 15:45:52,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143636447] [2022-01-18 15:45:52,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:52,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:45:52,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:52,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:45:52,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:45:52,678 INFO L87 Difference]: Start difference. First operand 4994 states and 22038 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:54,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:54,116 INFO L93 Difference]: Finished difference Result 6950 states and 29032 transitions. [2022-01-18 15:45:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:45:54,116 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:54,132 INFO L225 Difference]: With dead ends: 6950 [2022-01-18 15:45:54,132 INFO L226 Difference]: Without dead ends: 6943 [2022-01-18 15:45:54,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=288, Invalid=2792, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 15:45:54,133 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 283 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 3128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1012 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:54,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 284 Invalid, 3128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2055 Invalid, 0 Unknown, 1012 Unchecked, 0.7s Time] [2022-01-18 15:45:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6943 states. [2022-01-18 15:45:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6943 to 5475. [2022-01-18 15:45:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5475 states, 5474 states have (on average 4.370478626233102) internal successors, (23924), 5474 states have internal predecessors, (23924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 23924 transitions. [2022-01-18 15:45:54,248 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 23924 transitions. Word has length 30 [2022-01-18 15:45:54,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:54,248 INFO L470 AbstractCegarLoop]: Abstraction has 5475 states and 23924 transitions. [2022-01-18 15:45:54,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:54,249 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 23924 transitions. [2022-01-18 15:45:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:54,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:54,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:54,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:54,459 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,SelfDestructingSolverStorable180 [2022-01-18 15:45:54,459 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:54,460 INFO L85 PathProgramCache]: Analyzing trace with hash -703434075, now seen corresponding path program 2 times [2022-01-18 15:45:54,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:54,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116288417] [2022-01-18 15:45:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:54,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:54,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:54,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116288417] [2022-01-18 15:45:54,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116288417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:54,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456368085] [2022-01-18 15:45:54,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:54,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:54,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:54,701 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) [2022-01-18 15:45:54,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 15:45:54,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:54,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:54,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:54,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:54,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:54,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:54,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:54,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:54,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2022-01-18 15:45:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:55,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:55,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:55,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:55,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:55,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:55,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:45:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:55,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456368085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:55,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:55,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-01-18 15:45:55,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499340123] [2022-01-18 15:45:55,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:55,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:45:55,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:55,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:45:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:45:55,567 INFO L87 Difference]: Start difference. First operand 5475 states and 23924 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:57,384 INFO L93 Difference]: Finished difference Result 7649 states and 32174 transitions. [2022-01-18 15:45:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 15:45:57,385 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:57,403 INFO L225 Difference]: With dead ends: 7649 [2022-01-18 15:45:57,403 INFO L226 Difference]: Without dead ends: 7587 [2022-01-18 15:45:57,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=401, Invalid=3759, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 15:45:57,404 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 540 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 4182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1617 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:57,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 249 Invalid, 4182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2443 Invalid, 0 Unknown, 1617 Unchecked, 0.8s Time] [2022-01-18 15:45:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7587 states. [2022-01-18 15:45:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7587 to 5342. [2022-01-18 15:45:57,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5342 states, 5341 states have (on average 4.389065718030332) internal successors, (23442), 5341 states have internal predecessors, (23442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5342 states to 5342 states and 23442 transitions. [2022-01-18 15:45:57,528 INFO L78 Accepts]: Start accepts. Automaton has 5342 states and 23442 transitions. Word has length 30 [2022-01-18 15:45:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:57,529 INFO L470 AbstractCegarLoop]: Abstraction has 5342 states and 23442 transitions. [2022-01-18 15:45:57,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 5342 states and 23442 transitions. [2022-01-18 15:45:57,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:45:57,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:57,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:57,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:57,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:57,745 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:45:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:57,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1874833036, now seen corresponding path program 9 times [2022-01-18 15:45:57,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:57,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566735347] [2022-01-18 15:45:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:57,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:57,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:57,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566735347] [2022-01-18 15:45:57,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566735347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:57,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976675489] [2022-01-18 15:45:57,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:57,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:57,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:57,957 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) [2022-01-18 15:45:57,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 15:45:57,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:45:57,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:45:57,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:58,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:58,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:58,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:58,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 15:45:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:58,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:58,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:58,736 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:45:58,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:45:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:58,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976675489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:58,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:58,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 29 [2022-01-18 15:45:58,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820423812] [2022-01-18 15:45:58,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:58,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:45:58,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:58,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:45:58,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:45:58,840 INFO L87 Difference]: Start difference. First operand 5342 states and 23442 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:59,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:59,965 INFO L93 Difference]: Finished difference Result 6059 states and 25887 transitions. [2022-01-18 15:45:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:45:59,965 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:45:59,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:00,010 INFO L225 Difference]: With dead ends: 6059 [2022-01-18 15:46:00,010 INFO L226 Difference]: Without dead ends: 6052 [2022-01-18 15:46:00,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:46:00,010 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 166 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 3224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1599 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:00,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 237 Invalid, 3224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1571 Invalid, 0 Unknown, 1599 Unchecked, 0.6s Time] [2022-01-18 15:46:00,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2022-01-18 15:46:00,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 5463. [2022-01-18 15:46:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 5462 states have (on average 4.370194068106921) internal successors, (23870), 5462 states have internal predecessors, (23870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 23870 transitions. [2022-01-18 15:46:00,105 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 23870 transitions. Word has length 30 [2022-01-18 15:46:00,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:00,105 INFO L470 AbstractCegarLoop]: Abstraction has 5463 states and 23870 transitions. [2022-01-18 15:46:00,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:00,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 23870 transitions. [2022-01-18 15:46:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:00,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:00,114 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:00,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:00,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:00,327 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1846203885, now seen corresponding path program 3 times [2022-01-18 15:46:00,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:00,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265096982] [2022-01-18 15:46:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:00,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:00,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265096982] [2022-01-18 15:46:00,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265096982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124022884] [2022-01-18 15:46:00,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:00,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:00,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:00,542 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) [2022-01-18 15:46:00,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 15:46:00,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:46:00,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:00,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:46:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:00,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:00,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:00,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:00,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:46:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:01,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:01,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:01,513 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:46:01,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:46:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:01,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124022884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:01,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:01,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 29 [2022-01-18 15:46:01,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834478264] [2022-01-18 15:46:01,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:01,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:46:01,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:01,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:46:01,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:46:01,678 INFO L87 Difference]: Start difference. First operand 5463 states and 23870 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:02,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:02,794 INFO L93 Difference]: Finished difference Result 5905 states and 25415 transitions. [2022-01-18 15:46:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:46:02,794 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:02,808 INFO L225 Difference]: With dead ends: 5905 [2022-01-18 15:46:02,808 INFO L226 Difference]: Without dead ends: 5841 [2022-01-18 15:46:02,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:46:02,809 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 221 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1066 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:02,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 175 Invalid, 2523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1387 Invalid, 0 Unknown, 1066 Unchecked, 0.6s Time] [2022-01-18 15:46:02,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2022-01-18 15:46:02,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 5512. [2022-01-18 15:46:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5512 states, 5511 states have (on average 4.365269461077844) internal successors, (24057), 5511 states have internal predecessors, (24057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5512 states to 5512 states and 24057 transitions. [2022-01-18 15:46:02,897 INFO L78 Accepts]: Start accepts. Automaton has 5512 states and 24057 transitions. Word has length 30 [2022-01-18 15:46:02,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:02,897 INFO L470 AbstractCegarLoop]: Abstraction has 5512 states and 24057 transitions. [2022-01-18 15:46:02,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 5512 states and 24057 transitions. [2022-01-18 15:46:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:02,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:02,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:02,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:03,121 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,SelfDestructingSolverStorable183 [2022-01-18 15:46:03,121 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:03,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1237621851, now seen corresponding path program 2 times [2022-01-18 15:46:03,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:03,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808608417] [2022-01-18 15:46:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:03,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:03,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:03,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808608417] [2022-01-18 15:46:03,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808608417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:03,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228633988] [2022-01-18 15:46:03,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:03,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:03,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:03,310 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) [2022-01-18 15:46:03,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 15:46:03,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:03,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:03,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:03,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:03,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:03,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:03,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:03,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:03,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2022-01-18 15:46:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:03,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:04,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:04,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:04,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:04,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:04,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:46:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:04,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228633988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:04,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:04,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-01-18 15:46:04,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855340006] [2022-01-18 15:46:04,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:04,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:46:04,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:04,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:46:04,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:46:04,047 INFO L87 Difference]: Start difference. First operand 5512 states and 24057 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:05,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:05,914 INFO L93 Difference]: Finished difference Result 7638 states and 32201 transitions. [2022-01-18 15:46:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:46:05,914 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:05,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:05,931 INFO L225 Difference]: With dead ends: 7638 [2022-01-18 15:46:05,931 INFO L226 Difference]: Without dead ends: 7571 [2022-01-18 15:46:05,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=337, Invalid=3203, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 15:46:05,932 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 390 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 4839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1667 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:05,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 291 Invalid, 4839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3079 Invalid, 0 Unknown, 1667 Unchecked, 1.0s Time] [2022-01-18 15:46:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2022-01-18 15:46:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 5355. [2022-01-18 15:46:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5355 states, 5354 states have (on average 4.367575644378035) internal successors, (23384), 5354 states have internal predecessors, (23384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 23384 transitions. [2022-01-18 15:46:06,034 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 23384 transitions. Word has length 30 [2022-01-18 15:46:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:06,034 INFO L470 AbstractCegarLoop]: Abstraction has 5355 states and 23384 transitions. [2022-01-18 15:46:06,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 23384 transitions. [2022-01-18 15:46:06,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:06,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:06,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:06,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:06,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:06,258 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1984260065, now seen corresponding path program 3 times [2022-01-18 15:46:06,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:06,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863505824] [2022-01-18 15:46:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:06,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:06,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:06,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863505824] [2022-01-18 15:46:06,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863505824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:06,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451363566] [2022-01-18 15:46:06,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:06,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:06,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:06,478 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) [2022-01-18 15:46:06,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 15:46:06,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:46:06,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:06,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:46:06,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:06,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:06,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:06,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:06,852 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 15:46:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:06,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:07,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:07,469 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:46:07,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:46:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:07,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451363566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:07,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:07,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 29 [2022-01-18 15:46:07,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646262116] [2022-01-18 15:46:07,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:07,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:46:07,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:07,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:46:07,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:46:07,573 INFO L87 Difference]: Start difference. First operand 5355 states and 23384 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:08,621 INFO L93 Difference]: Finished difference Result 5770 states and 24861 transitions. [2022-01-18 15:46:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:46:08,622 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:08,635 INFO L225 Difference]: With dead ends: 5770 [2022-01-18 15:46:08,635 INFO L226 Difference]: Without dead ends: 5755 [2022-01-18 15:46:08,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:46:08,636 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1287 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:08,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 229 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1551 Invalid, 0 Unknown, 1287 Unchecked, 0.6s Time] [2022-01-18 15:46:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2022-01-18 15:46:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5350. [2022-01-18 15:46:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5350 states, 5349 states have (on average 4.369040942232193) internal successors, (23370), 5349 states have internal predecessors, (23370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5350 states to 5350 states and 23370 transitions. [2022-01-18 15:46:08,719 INFO L78 Accepts]: Start accepts. Automaton has 5350 states and 23370 transitions. Word has length 30 [2022-01-18 15:46:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:08,720 INFO L470 AbstractCegarLoop]: Abstraction has 5350 states and 23370 transitions. [2022-01-18 15:46:08,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5350 states and 23370 transitions. [2022-01-18 15:46:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:08,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:08,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:08,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:08,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:08,944 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:08,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:08,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1428009473, now seen corresponding path program 28 times [2022-01-18 15:46:08,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:08,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469440965] [2022-01-18 15:46:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:08,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:09,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:09,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469440965] [2022-01-18 15:46:09,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469440965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:09,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507997887] [2022-01-18 15:46:09,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:09,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:09,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:09,149 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) [2022-01-18 15:46:09,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 15:46:09,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:09,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:09,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:09,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:09,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:46:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:09,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:09,653 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:09,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-01-18 15:46:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:09,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507997887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:09,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:09,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:46:09,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889267803] [2022-01-18 15:46:09,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:09,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:46:09,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:09,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:46:09,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:46:09,753 INFO L87 Difference]: Start difference. First operand 5350 states and 23370 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:11,796 INFO L93 Difference]: Finished difference Result 7293 states and 31295 transitions. [2022-01-18 15:46:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 15:46:11,796 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:11,812 INFO L225 Difference]: With dead ends: 7293 [2022-01-18 15:46:11,812 INFO L226 Difference]: Without dead ends: 7272 [2022-01-18 15:46:11,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=508, Invalid=3398, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 15:46:11,813 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 481 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 3792 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 4022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 3792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:11,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 216 Invalid, 4022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 3792 Invalid, 0 Unknown, 25 Unchecked, 1.2s Time] [2022-01-18 15:46:11,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7272 states. [2022-01-18 15:46:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7272 to 5344. [2022-01-18 15:46:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5344 states, 5343 states have (on average 4.371139809096014) internal successors, (23355), 5343 states have internal predecessors, (23355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 23355 transitions. [2022-01-18 15:46:11,907 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 23355 transitions. Word has length 30 [2022-01-18 15:46:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:11,907 INFO L470 AbstractCegarLoop]: Abstraction has 5344 states and 23355 transitions. [2022-01-18 15:46:11,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 23355 transitions. [2022-01-18 15:46:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:11,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:11,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:11,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:12,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:12,131 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1019046356, now seen corresponding path program 10 times [2022-01-18 15:46:12,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:12,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991718451] [2022-01-18 15:46:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:12,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:12,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991718451] [2022-01-18 15:46:12,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991718451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094517495] [2022-01-18 15:46:12,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:12,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:12,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:12,345 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) [2022-01-18 15:46:12,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 15:46:12,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:12,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:12,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:12,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:12,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:12,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:12,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:12,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:46:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:12,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:13,020 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:13,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:46:13,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:13,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:13,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:13,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:13,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:46:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:13,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094517495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:13,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:13,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:46:13,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380874781] [2022-01-18 15:46:13,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:13,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:46:13,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:46:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:46:13,107 INFO L87 Difference]: Start difference. First operand 5344 states and 23355 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:14,063 INFO L93 Difference]: Finished difference Result 6188 states and 26568 transitions. [2022-01-18 15:46:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:46:14,063 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:14,076 INFO L225 Difference]: With dead ends: 6188 [2022-01-18 15:46:14,076 INFO L226 Difference]: Without dead ends: 6100 [2022-01-18 15:46:14,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:46:14,077 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 153 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:14,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 133 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1488 Invalid, 0 Unknown, 469 Unchecked, 0.6s Time] [2022-01-18 15:46:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2022-01-18 15:46:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 5370. [2022-01-18 15:46:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 4.369901285155523) internal successors, (23462), 5369 states have internal predecessors, (23462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:14,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 23462 transitions. [2022-01-18 15:46:14,163 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 23462 transitions. Word has length 30 [2022-01-18 15:46:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:14,163 INFO L470 AbstractCegarLoop]: Abstraction has 5370 states and 23462 transitions. [2022-01-18 15:46:14,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 23462 transitions. [2022-01-18 15:46:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:14,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:14,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:14,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:14,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:14,382 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1289693116, now seen corresponding path program 11 times [2022-01-18 15:46:14,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:14,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820798129] [2022-01-18 15:46:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:14,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:14,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:14,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820798129] [2022-01-18 15:46:14,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820798129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:14,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663405594] [2022-01-18 15:46:14,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:46:14,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:14,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:14,547 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) [2022-01-18 15:46:14,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 15:46:14,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:46:14,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:14,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:14,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:14,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:14,812 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 33 treesize of output 17 [2022-01-18 15:46:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:14,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:15,024 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:15,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:46:15,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:15,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:15,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:15,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:15,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:46:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:15,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663405594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:15,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:15,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:46:15,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462605184] [2022-01-18 15:46:15,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:15,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:46:15,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:15,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:46:15,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:46:15,075 INFO L87 Difference]: Start difference. First operand 5370 states and 23462 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:15,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:15,916 INFO L93 Difference]: Finished difference Result 6934 states and 29268 transitions. [2022-01-18 15:46:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:46:15,917 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:15,933 INFO L225 Difference]: With dead ends: 6934 [2022-01-18 15:46:15,933 INFO L226 Difference]: Without dead ends: 6844 [2022-01-18 15:46:15,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:46:15,933 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 246 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 603 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:15,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 177 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1468 Invalid, 0 Unknown, 603 Unchecked, 0.6s Time] [2022-01-18 15:46:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2022-01-18 15:46:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5456. [2022-01-18 15:46:16,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5456 states, 5455 states have (on average 4.363886342804766) internal successors, (23805), 5455 states have internal predecessors, (23805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5456 states to 5456 states and 23805 transitions. [2022-01-18 15:46:16,027 INFO L78 Accepts]: Start accepts. Automaton has 5456 states and 23805 transitions. Word has length 30 [2022-01-18 15:46:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:16,027 INFO L470 AbstractCegarLoop]: Abstraction has 5456 states and 23805 transitions. [2022-01-18 15:46:16,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5456 states and 23805 transitions. [2022-01-18 15:46:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:16,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:16,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:16,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:16,251 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,SelfDestructingSolverStorable188 [2022-01-18 15:46:16,251 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:16,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash 85442831, now seen corresponding path program 4 times [2022-01-18 15:46:16,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:16,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777638381] [2022-01-18 15:46:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:16,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:16,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:16,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777638381] [2022-01-18 15:46:16,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777638381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:16,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264401227] [2022-01-18 15:46:16,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:16,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:16,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:16,483 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) [2022-01-18 15:46:16,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 15:46:16,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:16,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:16,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:16,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:16,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:16,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:16,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:46:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:16,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:17,169 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:17,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:46:17,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:17,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:17,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:17,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:17,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:46:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:17,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264401227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:17,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:17,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:46:17,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881186909] [2022-01-18 15:46:17,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:17,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:46:17,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:17,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:46:17,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:46:17,253 INFO L87 Difference]: Start difference. First operand 5456 states and 23805 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:18,467 INFO L93 Difference]: Finished difference Result 6761 states and 28679 transitions. [2022-01-18 15:46:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:46:18,467 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:18,482 INFO L225 Difference]: With dead ends: 6761 [2022-01-18 15:46:18,482 INFO L226 Difference]: Without dead ends: 6643 [2022-01-18 15:46:18,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:46:18,482 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 243 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:18,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 162 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1896 Invalid, 0 Unknown, 425 Unchecked, 0.8s Time] [2022-01-18 15:46:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2022-01-18 15:46:18,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 5406. [2022-01-18 15:46:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5406 states, 5405 states have (on average 4.372432932469935) internal successors, (23633), 5405 states have internal predecessors, (23633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:18,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 23633 transitions. [2022-01-18 15:46:18,570 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 23633 transitions. Word has length 30 [2022-01-18 15:46:18,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:18,570 INFO L470 AbstractCegarLoop]: Abstraction has 5406 states and 23633 transitions. [2022-01-18 15:46:18,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 23633 transitions. [2022-01-18 15:46:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:18,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:18,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:18,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:18,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-01-18 15:46:18,795 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash -235668790, now seen corresponding path program 12 times [2022-01-18 15:46:18,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:18,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92628486] [2022-01-18 15:46:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:18,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:18,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92628486] [2022-01-18 15:46:18,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92628486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750729247] [2022-01-18 15:46:18,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:46:18,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:18,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:18,934 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) [2022-01-18 15:46:18,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 15:46:18,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:46:18,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:18,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:46:18,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:19,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:19,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:19,173 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 15:46:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:19,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:19,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:19,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:19,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:19,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-01-18 15:46:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:19,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750729247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:19,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:19,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-01-18 15:46:19,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341276234] [2022-01-18 15:46:19,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:19,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:46:19,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:19,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:46:19,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:46:19,822 INFO L87 Difference]: Start difference. First operand 5406 states and 23633 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:21,135 INFO L93 Difference]: Finished difference Result 6784 states and 28591 transitions. [2022-01-18 15:46:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:46:21,136 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:21,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:21,151 INFO L225 Difference]: With dead ends: 6784 [2022-01-18 15:46:21,151 INFO L226 Difference]: Without dead ends: 6616 [2022-01-18 15:46:21,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:46:21,152 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 401 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1485 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:21,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 139 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 778 Invalid, 0 Unknown, 1485 Unchecked, 0.3s Time] [2022-01-18 15:46:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2022-01-18 15:46:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 5548. [2022-01-18 15:46:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5548 states, 5547 states have (on average 4.361456643230575) internal successors, (24193), 5547 states have internal predecessors, (24193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5548 states to 5548 states and 24193 transitions. [2022-01-18 15:46:21,275 INFO L78 Accepts]: Start accepts. Automaton has 5548 states and 24193 transitions. Word has length 30 [2022-01-18 15:46:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:21,275 INFO L470 AbstractCegarLoop]: Abstraction has 5548 states and 24193 transitions. [2022-01-18 15:46:21,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5548 states and 24193 transitions. [2022-01-18 15:46:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:21,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:21,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:21,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:21,495 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,SelfDestructingSolverStorable190 [2022-01-18 15:46:21,495 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:21,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1139788194, now seen corresponding path program 1 times [2022-01-18 15:46:21,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:21,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018292697] [2022-01-18 15:46:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:21,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:21,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:21,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018292697] [2022-01-18 15:46:21,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018292697] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:21,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358312905] [2022-01-18 15:46:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:21,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:21,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:21,706 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) [2022-01-18 15:46:21,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 15:46:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:21,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:21,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:21,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:21,984 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 17 [2022-01-18 15:46:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:22,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:22,192 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:22,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:46:22,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:22,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:22,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:22,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:22,234 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 25 treesize of output 3 [2022-01-18 15:46:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:22,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358312905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:22,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:22,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 28 [2022-01-18 15:46:22,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543416155] [2022-01-18 15:46:22,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:22,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:46:22,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:46:22,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:46:22,251 INFO L87 Difference]: Start difference. First operand 5548 states and 24193 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:23,128 INFO L93 Difference]: Finished difference Result 6640 states and 28372 transitions. [2022-01-18 15:46:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:46:23,128 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:23,146 INFO L225 Difference]: With dead ends: 6640 [2022-01-18 15:46:23,147 INFO L226 Difference]: Without dead ends: 6574 [2022-01-18 15:46:23,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:46:23,147 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 133 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 2970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 844 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:23,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 250 Invalid, 2970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2088 Invalid, 0 Unknown, 844 Unchecked, 0.6s Time] [2022-01-18 15:46:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6574 states. [2022-01-18 15:46:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6574 to 5746. [2022-01-18 15:46:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5746 states, 5745 states have (on average 4.337859007832898) internal successors, (24921), 5745 states have internal predecessors, (24921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5746 states to 5746 states and 24921 transitions. [2022-01-18 15:46:23,251 INFO L78 Accepts]: Start accepts. Automaton has 5746 states and 24921 transitions. Word has length 30 [2022-01-18 15:46:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:23,251 INFO L470 AbstractCegarLoop]: Abstraction has 5746 states and 24921 transitions. [2022-01-18 15:46:23,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5746 states and 24921 transitions. [2022-01-18 15:46:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:23,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:23,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:23,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-01-18 15:46:23,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:23,477 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:23,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:23,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1863518227, now seen corresponding path program 1 times [2022-01-18 15:46:23,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:23,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479054562] [2022-01-18 15:46:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:23,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:23,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:23,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479054562] [2022-01-18 15:46:23,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479054562] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:23,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653915959] [2022-01-18 15:46:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:23,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:23,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:23,697 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) [2022-01-18 15:46:23,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 15:46:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:23,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:23,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:23,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:23,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:23,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:23,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:46:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:24,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:24,195 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:24,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:46:24,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:24,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:24,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:24,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:24,232 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:46:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:24,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653915959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:24,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:24,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:46:24,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629236146] [2022-01-18 15:46:24,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:24,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:46:24,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:46:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:46:24,248 INFO L87 Difference]: Start difference. First operand 5746 states and 24921 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:25,204 INFO L93 Difference]: Finished difference Result 6708 states and 28662 transitions. [2022-01-18 15:46:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:46:25,204 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:25,218 INFO L225 Difference]: With dead ends: 6708 [2022-01-18 15:46:25,219 INFO L226 Difference]: Without dead ends: 6628 [2022-01-18 15:46:25,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:46:25,219 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 139 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:25,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 155 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1619 Invalid, 0 Unknown, 519 Unchecked, 0.6s Time] [2022-01-18 15:46:25,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6628 states. [2022-01-18 15:46:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6628 to 5792. [2022-01-18 15:46:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.336211362458988) internal successors, (25111), 5791 states have internal predecessors, (25111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25111 transitions. [2022-01-18 15:46:25,310 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25111 transitions. Word has length 30 [2022-01-18 15:46:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:25,310 INFO L470 AbstractCegarLoop]: Abstraction has 5792 states and 25111 transitions. [2022-01-18 15:46:25,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25111 transitions. [2022-01-18 15:46:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:25,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:25,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:25,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:25,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:25,531 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:25,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2134164987, now seen corresponding path program 2 times [2022-01-18 15:46:25,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:25,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287670882] [2022-01-18 15:46:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:25,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:25,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:25,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287670882] [2022-01-18 15:46:25,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287670882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:25,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376392962] [2022-01-18 15:46:25,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:25,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:25,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:25,724 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) [2022-01-18 15:46:25,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 15:46:25,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:25,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:25,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:25,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:25,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:25,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:25,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:25,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2022-01-18 15:46:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:26,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:26,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:26,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:26,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:26,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:26,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:46:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:26,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376392962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:26,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:26,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:46:26,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122468492] [2022-01-18 15:46:26,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:26,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:46:26,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:46:26,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:46:26,365 INFO L87 Difference]: Start difference. First operand 5792 states and 25111 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:27,822 INFO L93 Difference]: Finished difference Result 8699 states and 36222 transitions. [2022-01-18 15:46:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 15:46:27,822 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:27,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:27,841 INFO L225 Difference]: With dead ends: 8699 [2022-01-18 15:46:27,841 INFO L226 Difference]: Without dead ends: 8608 [2022-01-18 15:46:27,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=514, Invalid=3518, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 15:46:27,842 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 554 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 4056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2338 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:27,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 219 Invalid, 4056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1515 Invalid, 0 Unknown, 2338 Unchecked, 0.6s Time] [2022-01-18 15:46:27,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2022-01-18 15:46:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 5749. [2022-01-18 15:46:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5749 states, 5748 states have (on average 4.340118302018094) internal successors, (24947), 5748 states have internal predecessors, (24947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5749 states to 5749 states and 24947 transitions. [2022-01-18 15:46:27,951 INFO L78 Accepts]: Start accepts. Automaton has 5749 states and 24947 transitions. Word has length 30 [2022-01-18 15:46:27,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:27,951 INFO L470 AbstractCegarLoop]: Abstraction has 5749 states and 24947 transitions. [2022-01-18 15:46:27,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 5749 states and 24947 transitions. [2022-01-18 15:46:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:27,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:27,960 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:27,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:28,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:28,165 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:28,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:28,165 INFO L85 PathProgramCache]: Analyzing trace with hash 355111619, now seen corresponding path program 3 times [2022-01-18 15:46:28,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:28,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986812132] [2022-01-18 15:46:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:28,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:28,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:28,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986812132] [2022-01-18 15:46:28,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986812132] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:28,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028008064] [2022-01-18 15:46:28,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:28,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:28,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:28,350 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) [2022-01-18 15:46:28,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 15:46:28,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:46:28,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:28,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:46:28,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:28,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:28,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:28,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:28,905 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 29 treesize of output 17 [2022-01-18 15:46:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:28,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:29,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:29,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:29,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:29,344 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 47 treesize of output 64 [2022-01-18 15:46:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:29,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028008064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:29,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:29,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-01-18 15:46:29,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929078965] [2022-01-18 15:46:29,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:29,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:46:29,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:46:29,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:46:29,466 INFO L87 Difference]: Start difference. First operand 5749 states and 24947 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:31,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:31,726 INFO L93 Difference]: Finished difference Result 7774 states and 32448 transitions. [2022-01-18 15:46:31,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:46:31,726 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:31,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:31,743 INFO L225 Difference]: With dead ends: 7774 [2022-01-18 15:46:31,744 INFO L226 Difference]: Without dead ends: 7675 [2022-01-18 15:46:31,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=422, Invalid=3238, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 15:46:31,744 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 348 mSDsluCounter, 2229 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 4794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1811 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:31,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 275 Invalid, 4794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2866 Invalid, 0 Unknown, 1811 Unchecked, 1.2s Time] [2022-01-18 15:46:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7675 states. [2022-01-18 15:46:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7675 to 5656. [2022-01-18 15:46:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5656 states, 5655 states have (on average 4.354022988505747) internal successors, (24622), 5655 states have internal predecessors, (24622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5656 states to 5656 states and 24622 transitions. [2022-01-18 15:46:31,846 INFO L78 Accepts]: Start accepts. Automaton has 5656 states and 24622 transitions. Word has length 30 [2022-01-18 15:46:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:31,846 INFO L470 AbstractCegarLoop]: Abstraction has 5656 states and 24622 transitions. [2022-01-18 15:46:31,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 5656 states and 24622 transitions. [2022-01-18 15:46:31,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:31,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:31,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:31,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-18 15:46:32,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:32,071 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2017522460, now seen corresponding path program 13 times [2022-01-18 15:46:32,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:32,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431021873] [2022-01-18 15:46:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:32,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:32,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:32,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431021873] [2022-01-18 15:46:32,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431021873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:32,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662836487] [2022-01-18 15:46:32,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:46:32,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:32,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:32,291 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) [2022-01-18 15:46:32,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 15:46:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:32,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:32,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:32,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:32,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:32,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:32,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:46:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:32,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:32,953 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:32,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:46:33,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:33,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:33,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:33,019 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 25 treesize of output 3 [2022-01-18 15:46:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:33,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662836487] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:33,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:33,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:46:33,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595691695] [2022-01-18 15:46:33,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:33,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:46:33,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:46:33,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:46:33,045 INFO L87 Difference]: Start difference. First operand 5656 states and 24622 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:33,921 INFO L93 Difference]: Finished difference Result 6618 states and 28362 transitions. [2022-01-18 15:46:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:46:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:33,937 INFO L225 Difference]: With dead ends: 6618 [2022-01-18 15:46:33,937 INFO L226 Difference]: Without dead ends: 6560 [2022-01-18 15:46:33,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:46:33,937 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 297 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 631 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:33,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 148 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1351 Invalid, 0 Unknown, 631 Unchecked, 0.5s Time] [2022-01-18 15:46:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6560 states. [2022-01-18 15:46:34,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6560 to 5259. [2022-01-18 15:46:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5259 states, 5258 states have (on average 4.386268543172309) internal successors, (23063), 5258 states have internal predecessors, (23063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5259 states to 5259 states and 23063 transitions. [2022-01-18 15:46:34,025 INFO L78 Accepts]: Start accepts. Automaton has 5259 states and 23063 transitions. Word has length 30 [2022-01-18 15:46:34,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:34,025 INFO L470 AbstractCegarLoop]: Abstraction has 5259 states and 23063 transitions. [2022-01-18 15:46:34,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:34,025 INFO L276 IsEmpty]: Start isEmpty. Operand 5259 states and 23063 transitions. [2022-01-18 15:46:34,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:34,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:34,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:34,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:34,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:34,248 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:34,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1776242996, now seen corresponding path program 14 times [2022-01-18 15:46:34,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:34,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656038034] [2022-01-18 15:46:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:34,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:34,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:34,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656038034] [2022-01-18 15:46:34,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656038034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:34,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924265189] [2022-01-18 15:46:34,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:34,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:34,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:34,443 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) [2022-01-18 15:46:34,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 15:46:34,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:34,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:34,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:34,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:34,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:34,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:34,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:34,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:46:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:34,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:35,026 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:35,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:46:35,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:35,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:35,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:35,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:35,066 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 25 treesize of output 3 [2022-01-18 15:46:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:35,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924265189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:35,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:35,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:46:35,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986011658] [2022-01-18 15:46:35,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:35,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:46:35,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:46:35,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:46:35,081 INFO L87 Difference]: Start difference. First operand 5259 states and 23063 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-01-18 15:46:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:36,140 INFO L93 Difference]: Finished difference Result 6228 states and 26789 transitions. [2022-01-18 15:46:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:46:36,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 30 [2022-01-18 15:46:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:36,154 INFO L225 Difference]: With dead ends: 6228 [2022-01-18 15:46:36,155 INFO L226 Difference]: Without dead ends: 6142 [2022-01-18 15:46:36,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:46:36,155 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 222 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:36,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 161 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1639 Invalid, 0 Unknown, 347 Unchecked, 0.7s Time] [2022-01-18 15:46:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6142 states. [2022-01-18 15:46:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6142 to 5252. [2022-01-18 15:46:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5252 states, 5251 states have (on average 4.382974671491144) internal successors, (23015), 5251 states have internal predecessors, (23015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5252 states to 5252 states and 23015 transitions. [2022-01-18 15:46:36,241 INFO L78 Accepts]: Start accepts. Automaton has 5252 states and 23015 transitions. Word has length 30 [2022-01-18 15:46:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:36,241 INFO L470 AbstractCegarLoop]: Abstraction has 5252 states and 23015 transitions. [2022-01-18 15:46:36,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-01-18 15:46:36,241 INFO L276 IsEmpty]: Start isEmpty. Operand 5252 states and 23015 transitions. [2022-01-18 15:46:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:36,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:36,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:36,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:36,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:36,463 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:36,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1846353032, now seen corresponding path program 15 times [2022-01-18 15:46:36,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:36,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814475763] [2022-01-18 15:46:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:36,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:36,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814475763] [2022-01-18 15:46:36,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814475763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647421967] [2022-01-18 15:46:36,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:36,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:36,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:36,659 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) [2022-01-18 15:46:36,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 15:46:36,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:46:36,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:46:36,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:36,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:36,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:36,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:36,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:46:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:37,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:37,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:37,594 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:46:37,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:46:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:37,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647421967] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:37,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:37,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-01-18 15:46:37,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331367544] [2022-01-18 15:46:37,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:37,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:46:37,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:37,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:46:37,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:46:37,725 INFO L87 Difference]: Start difference. First operand 5252 states and 23015 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:46:40,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:40,041 INFO L93 Difference]: Finished difference Result 6624 states and 28122 transitions. [2022-01-18 15:46:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 15:46:40,041 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 30 [2022-01-18 15:46:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:40,057 INFO L225 Difference]: With dead ends: 6624 [2022-01-18 15:46:40,057 INFO L226 Difference]: Without dead ends: 6498 [2022-01-18 15:46:40,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:46:40,063 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 330 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1155 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:40,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 168 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2080 Invalid, 0 Unknown, 1155 Unchecked, 1.0s Time] [2022-01-18 15:46:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6498 states. [2022-01-18 15:46:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6498 to 5338. [2022-01-18 15:46:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 4.3805508712759975) internal successors, (23379), 5337 states have internal predecessors, (23379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 23379 transitions. [2022-01-18 15:46:40,153 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 23379 transitions. Word has length 30 [2022-01-18 15:46:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:40,153 INFO L470 AbstractCegarLoop]: Abstraction has 5338 states and 23379 transitions. [2022-01-18 15:46:40,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:46:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 23379 transitions. [2022-01-18 15:46:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:40,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:40,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:40,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 15:46:40,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:40,370 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:40,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:40,370 INFO L85 PathProgramCache]: Analyzing trace with hash 557205232, now seen corresponding path program 16 times [2022-01-18 15:46:40,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:40,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748081204] [2022-01-18 15:46:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:40,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:40,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:40,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748081204] [2022-01-18 15:46:40,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748081204] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:40,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380786402] [2022-01-18 15:46:40,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:40,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:40,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:40,569 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) [2022-01-18 15:46:40,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 15:46:40,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:40,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:40,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:40,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:40,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:40,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:40,776 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 33 treesize of output 17 [2022-01-18 15:46:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:40,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:41,000 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:41,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:46:41,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:41,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:41,054 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 25 treesize of output 3 [2022-01-18 15:46:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:41,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380786402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:41,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:41,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:46:41,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066718609] [2022-01-18 15:46:41,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:41,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:46:41,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:41,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:46:41,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:46:41,072 INFO L87 Difference]: Start difference. First operand 5338 states and 23379 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:42,301 INFO L93 Difference]: Finished difference Result 6752 states and 28904 transitions. [2022-01-18 15:46:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:46:42,302 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:42,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:42,317 INFO L225 Difference]: With dead ends: 6752 [2022-01-18 15:46:42,317 INFO L226 Difference]: Without dead ends: 6630 [2022-01-18 15:46:42,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:46:42,318 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 328 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 703 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:42,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 198 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2382 Invalid, 0 Unknown, 703 Unchecked, 0.8s Time] [2022-01-18 15:46:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2022-01-18 15:46:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 4930. [2022-01-18 15:46:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4929 states have (on average 4.429498884155001) internal successors, (21833), 4929 states have internal predecessors, (21833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 21833 transitions. [2022-01-18 15:46:42,434 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 21833 transitions. Word has length 30 [2022-01-18 15:46:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:42,434 INFO L470 AbstractCegarLoop]: Abstraction has 4930 states and 21833 transitions. [2022-01-18 15:46:42,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 21833 transitions. [2022-01-18 15:46:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:42,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:42,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:42,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-01-18 15:46:42,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:42,663 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1982940592, now seen corresponding path program 17 times [2022-01-18 15:46:42,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:42,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298369620] [2022-01-18 15:46:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:42,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:42,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:42,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298369620] [2022-01-18 15:46:42,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298369620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:42,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668418160] [2022-01-18 15:46:42,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:46:42,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:42,895 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) [2022-01-18 15:46:42,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 15:46:42,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:46:42,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:42,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:42,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:43,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:43,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:43,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:43,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:46:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:43,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:43,540 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:43,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:46:43,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:43,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:43,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:43,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:43,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:46:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:43,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668418160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:43,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:43,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:46:43,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946854556] [2022-01-18 15:46:43,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:43,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:46:43,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:43,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:46:43,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:46:43,629 INFO L87 Difference]: Start difference. First operand 4930 states and 21833 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:44,612 INFO L93 Difference]: Finished difference Result 5927 states and 25713 transitions. [2022-01-18 15:46:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:46:44,612 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:44,625 INFO L225 Difference]: With dead ends: 5927 [2022-01-18 15:46:44,625 INFO L226 Difference]: Without dead ends: 5854 [2022-01-18 15:46:44,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:46:44,626 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 203 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:44,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 183 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1757 Invalid, 0 Unknown, 380 Unchecked, 0.7s Time] [2022-01-18 15:46:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5854 states. [2022-01-18 15:46:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5854 to 5012. [2022-01-18 15:46:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 5011 states have (on average 4.422869686689284) internal successors, (22163), 5011 states have internal predecessors, (22163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 22163 transitions. [2022-01-18 15:46:44,705 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 22163 transitions. Word has length 30 [2022-01-18 15:46:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:44,706 INFO L470 AbstractCegarLoop]: Abstraction has 5012 states and 22163 transitions. [2022-01-18 15:46:44,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 22163 transitions. [2022-01-18 15:46:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:44,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:44,714 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:44,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 15:46:44,929 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,SelfDestructingSolverStorable199 [2022-01-18 15:46:44,929 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:44,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2094934263, now seen corresponding path program 4 times [2022-01-18 15:46:44,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:44,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772117398] [2022-01-18 15:46:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:44,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:45,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:45,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772117398] [2022-01-18 15:46:45,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772117398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:45,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600555538] [2022-01-18 15:46:45,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:45,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:45,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:45,213 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) [2022-01-18 15:46:45,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 15:46:45,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:45,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:45,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:45,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:45,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:45,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:45,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:45,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:46:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:45,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:45,865 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:45,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:46:45,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:45,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:45,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:45,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:45,927 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 25 treesize of output 3 [2022-01-18 15:46:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:45,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600555538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:45,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:45,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:46:45,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228995109] [2022-01-18 15:46:45,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:45,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:46:45,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:45,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:46:45,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:46:45,951 INFO L87 Difference]: Start difference. First operand 5012 states and 22163 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:47,136 INFO L93 Difference]: Finished difference Result 5894 states and 25578 transitions. [2022-01-18 15:46:47,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:46:47,136 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:46:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:47,150 INFO L225 Difference]: With dead ends: 5894 [2022-01-18 15:46:47,150 INFO L226 Difference]: Without dead ends: 5819 [2022-01-18 15:46:47,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=1159, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:46:47,150 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 278 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 496 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:47,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 149 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1731 Invalid, 0 Unknown, 496 Unchecked, 0.9s Time] [2022-01-18 15:46:47,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5819 states. [2022-01-18 15:46:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5819 to 4619. [2022-01-18 15:46:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 4618 states have (on average 4.467085318319619) internal successors, (20629), 4618 states have internal predecessors, (20629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 20629 transitions. [2022-01-18 15:46:47,255 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 20629 transitions. Word has length 30 [2022-01-18 15:46:47,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:47,255 INFO L470 AbstractCegarLoop]: Abstraction has 4619 states and 20629 transitions. [2022-01-18 15:46:47,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:47,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 20629 transitions. [2022-01-18 15:46:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:47,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:47,263 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:47,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:47,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:47,481 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:47,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:47,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1596110067, now seen corresponding path program 68 times [2022-01-18 15:46:47,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:47,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752813415] [2022-01-18 15:46:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:47,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:47,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:47,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752813415] [2022-01-18 15:46:47,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752813415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:47,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051950051] [2022-01-18 15:46:47,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:47,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:47,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:47,732 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) [2022-01-18 15:46:47,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 15:46:47,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:47,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:47,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:48,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:48,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:48,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:48,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-01-18 15:46:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:48,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:48,391 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:46:48,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:46:48,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:48,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:48,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:48,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:48,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:46:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:48,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051950051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:48,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:48,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:46:48,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066834353] [2022-01-18 15:46:48,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:48,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:46:48,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:46:48,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:46:48,477 INFO L87 Difference]: Start difference. First operand 4619 states and 20629 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:46:50,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:50,411 INFO L93 Difference]: Finished difference Result 5261 states and 23179 transitions. [2022-01-18 15:46:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:46:50,412 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 30 [2022-01-18 15:46:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:50,425 INFO L225 Difference]: With dead ends: 5261 [2022-01-18 15:46:50,425 INFO L226 Difference]: Without dead ends: 5212 [2022-01-18 15:46:50,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:46:50,426 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 211 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:50,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 160 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1910 Invalid, 0 Unknown, 660 Unchecked, 0.8s Time] [2022-01-18 15:46:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5212 states. [2022-01-18 15:46:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5212 to 4670. [2022-01-18 15:46:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4670 states, 4669 states have (on average 4.460484043692439) internal successors, (20826), 4669 states have internal predecessors, (20826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 20826 transitions. [2022-01-18 15:46:50,507 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 20826 transitions. Word has length 30 [2022-01-18 15:46:50,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:50,507 INFO L470 AbstractCegarLoop]: Abstraction has 4670 states and 20826 transitions. [2022-01-18 15:46:50,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:46:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 20826 transitions. [2022-01-18 15:46:50,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:46:50,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:50,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:50,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:50,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-01-18 15:46:50,735 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:46:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:50,735 INFO L85 PathProgramCache]: Analyzing trace with hash 412678609, now seen corresponding path program 69 times [2022-01-18 15:46:50,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:50,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817857227] [2022-01-18 15:46:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:50,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:51,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:51,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817857227] [2022-01-18 15:46:51,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817857227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:51,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222640626] [2022-01-18 15:46:51,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:51,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:51,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:51,012 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) [2022-01-18 15:46:51,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 15:46:51,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:46:51,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:51,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:46:51,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:51,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:51,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 64 [2022-01-18 15:46:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:58,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:59,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:59,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:59,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:59,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:59,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 9 [2022-01-18 15:46:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:59,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222640626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:59,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:59,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 15:46:59,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591137367] [2022-01-18 15:46:59,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:59,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:46:59,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:46:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:46:59,811 INFO L87 Difference]: Start difference. First operand 4670 states and 20826 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:11,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:11,560 INFO L93 Difference]: Finished difference Result 6025 states and 26166 transitions. [2022-01-18 15:47:11,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 15:47:11,561 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:47:11,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:11,577 INFO L225 Difference]: With dead ends: 6025 [2022-01-18 15:47:11,577 INFO L226 Difference]: Without dead ends: 5881 [2022-01-18 15:47:11,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=672, Invalid=5647, Unknown=1, NotChecked=0, Total=6320 [2022-01-18 15:47:11,578 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 523 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 4030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1085 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:11,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 262 Invalid, 4030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2839 Invalid, 0 Unknown, 1085 Unchecked, 1.7s Time] [2022-01-18 15:47:11,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5881 states. [2022-01-18 15:47:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5881 to 4691. [2022-01-18 15:47:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 4.454797441364605) internal successors, (20893), 4690 states have internal predecessors, (20893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 20893 transitions. [2022-01-18 15:47:11,675 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 20893 transitions. Word has length 30 [2022-01-18 15:47:11,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:11,675 INFO L470 AbstractCegarLoop]: Abstraction has 4691 states and 20893 transitions. [2022-01-18 15:47:11,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:11,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 20893 transitions. [2022-01-18 15:47:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:11,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:11,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:11,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 15:47:11,887 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,SelfDestructingSolverStorable202 [2022-01-18 15:47:11,887 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:11,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:11,887 INFO L85 PathProgramCache]: Analyzing trace with hash -311430757, now seen corresponding path program 70 times [2022-01-18 15:47:11,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:11,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245627694] [2022-01-18 15:47:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:11,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:12,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:12,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245627694] [2022-01-18 15:47:12,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245627694] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:12,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067818484] [2022-01-18 15:47:12,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:47:12,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:12,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:12,104 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) [2022-01-18 15:47:12,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 15:47:12,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:47:12,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:12,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:47:12,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:12,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:12,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:12,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:12,439 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 33 treesize of output 17 [2022-01-18 15:47:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:12,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:12,717 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:47:12,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:47:12,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:12,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:12,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:12,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:47:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:12,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067818484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:12,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:12,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:47:12,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901152820] [2022-01-18 15:47:12,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:12,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:47:12,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:47:12,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:47:12,777 INFO L87 Difference]: Start difference. First operand 4691 states and 20893 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) [2022-01-18 15:47:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:13,520 INFO L93 Difference]: Finished difference Result 5439 states and 23837 transitions. [2022-01-18 15:47:13,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:47:13,520 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 30 [2022-01-18 15:47:13,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:13,537 INFO L225 Difference]: With dead ends: 5439 [2022-01-18 15:47:13,537 INFO L226 Difference]: Without dead ends: 5388 [2022-01-18 15:47:13,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:47:13,538 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 188 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:13,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 170 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1477 Invalid, 0 Unknown, 428 Unchecked, 0.5s Time] [2022-01-18 15:47:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2022-01-18 15:47:13,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4717. [2022-01-18 15:47:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4717 states, 4716 states have (on average 4.457379134860051) internal successors, (21021), 4716 states have internal predecessors, (21021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 21021 transitions. [2022-01-18 15:47:13,655 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 21021 transitions. Word has length 30 [2022-01-18 15:47:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:13,655 INFO L470 AbstractCegarLoop]: Abstraction has 4717 states and 21021 transitions. [2022-01-18 15:47:13,655 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) [2022-01-18 15:47:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 21021 transitions. [2022-01-18 15:47:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:13,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:13,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:13,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-01-18 15:47:13,881 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,SelfDestructingSolverStorable203 [2022-01-18 15:47:13,881 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:13,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:13,882 INFO L85 PathProgramCache]: Analyzing trace with hash -982863326, now seen corresponding path program 18 times [2022-01-18 15:47:13,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:13,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699410596] [2022-01-18 15:47:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:13,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:14,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:14,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699410596] [2022-01-18 15:47:14,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699410596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:14,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921428790] [2022-01-18 15:47:14,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:47:14,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:14,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:14,141 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) [2022-01-18 15:47:14,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 15:47:14,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:47:14,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:14,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:47:14,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:14,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:14,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:14,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:14,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:14,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2022-01-18 15:47:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:14,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:14,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:14,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:14,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:14,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:47:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:14,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921428790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:14,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:14,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:47:14,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089746555] [2022-01-18 15:47:14,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:14,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:47:14,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:14,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:47:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:47:14,992 INFO L87 Difference]: Start difference. First operand 4717 states and 21021 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:20,824 INFO L93 Difference]: Finished difference Result 8378 states and 34720 transitions. [2022-01-18 15:47:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 15:47:20,825 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:47:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:20,845 INFO L225 Difference]: With dead ends: 8378 [2022-01-18 15:47:20,845 INFO L226 Difference]: Without dead ends: 8212 [2022-01-18 15:47:20,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1152, Invalid=9768, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 15:47:20,846 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 904 mSDsluCounter, 2257 mSDsCounter, 0 mSdLazyCounter, 4294 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 5331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 4294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 680 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:20,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 284 Invalid, 5331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 4294 Invalid, 0 Unknown, 680 Unchecked, 2.5s Time] [2022-01-18 15:47:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2022-01-18 15:47:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 4775. [2022-01-18 15:47:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4775 states, 4774 states have (on average 4.462295768747381) internal successors, (21303), 4774 states have internal predecessors, (21303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 21303 transitions. [2022-01-18 15:47:20,952 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 21303 transitions. Word has length 30 [2022-01-18 15:47:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:20,952 INFO L470 AbstractCegarLoop]: Abstraction has 4775 states and 21303 transitions. [2022-01-18 15:47:20,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 21303 transitions. [2022-01-18 15:47:20,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:20,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:20,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:20,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-01-18 15:47:21,176 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,SelfDestructingSolverStorable204 [2022-01-18 15:47:21,177 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1905477006, now seen corresponding path program 19 times [2022-01-18 15:47:21,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:21,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596683688] [2022-01-18 15:47:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:21,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:21,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:21,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596683688] [2022-01-18 15:47:21,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596683688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:21,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368839432] [2022-01-18 15:47:21,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:47:21,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:21,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:21,420 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) [2022-01-18 15:47:21,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 15:47:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:21,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:47:21,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:21,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:21,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:21,715 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 30 treesize of output 16 [2022-01-18 15:47:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:21,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:22,063 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:47:22,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:47:22,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:22,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:22,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:22,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:22,126 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 25 treesize of output 3 [2022-01-18 15:47:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:22,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368839432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:22,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:22,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:47:22,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563608170] [2022-01-18 15:47:22,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:22,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:47:22,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:47:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:47:22,153 INFO L87 Difference]: Start difference. First operand 4775 states and 21303 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:47:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:23,361 INFO L93 Difference]: Finished difference Result 5403 states and 23774 transitions. [2022-01-18 15:47:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:47:23,361 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 30 [2022-01-18 15:47:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:23,375 INFO L225 Difference]: With dead ends: 5403 [2022-01-18 15:47:23,375 INFO L226 Difference]: Without dead ends: 5330 [2022-01-18 15:47:23,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:47:23,375 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:23,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 135 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1958 Invalid, 0 Unknown, 639 Unchecked, 0.8s Time] [2022-01-18 15:47:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5330 states. [2022-01-18 15:47:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5330 to 4785. [2022-01-18 15:47:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4785 states, 4784 states have (on average 4.461747491638796) internal successors, (21345), 4784 states have internal predecessors, (21345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4785 states to 4785 states and 21345 transitions. [2022-01-18 15:47:23,575 INFO L78 Accepts]: Start accepts. Automaton has 4785 states and 21345 transitions. Word has length 30 [2022-01-18 15:47:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:23,575 INFO L470 AbstractCegarLoop]: Abstraction has 4785 states and 21345 transitions. [2022-01-18 15:47:23,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:47:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 4785 states and 21345 transitions. [2022-01-18 15:47:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:23,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:23,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:23,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-01-18 15:47:23,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:23,803 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:23,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:23,803 INFO L85 PathProgramCache]: Analyzing trace with hash -425123554, now seen corresponding path program 20 times [2022-01-18 15:47:23,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:23,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394087424] [2022-01-18 15:47:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:23,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:24,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394087424] [2022-01-18 15:47:24,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394087424] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519022732] [2022-01-18 15:47:24,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:47:24,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:24,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:24,096 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) [2022-01-18 15:47:24,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 15:47:24,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:47:24,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:47:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:24,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:24,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:24,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:24,471 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 15:47:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:24,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:25,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:25,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:25,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:25,369 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 48 treesize of output 65 [2022-01-18 15:47:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:25,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519022732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:25,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:25,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-01-18 15:47:25,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638115285] [2022-01-18 15:47:25,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:25,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:47:25,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:25,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:47:25,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:47:25,498 INFO L87 Difference]: Start difference. First operand 4785 states and 21345 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:28,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:28,528 INFO L93 Difference]: Finished difference Result 7055 states and 30342 transitions. [2022-01-18 15:47:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 15:47:28,528 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:47:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:28,546 INFO L225 Difference]: With dead ends: 7055 [2022-01-18 15:47:28,546 INFO L226 Difference]: Without dead ends: 6762 [2022-01-18 15:47:28,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=759, Invalid=5561, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 15:47:28,547 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 423 mSDsluCounter, 2281 mSDsCounter, 0 mSdLazyCounter, 2742 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 5271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2395 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:28,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 245 Invalid, 5271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2742 Invalid, 0 Unknown, 2395 Unchecked, 1.0s Time] [2022-01-18 15:47:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6762 states. [2022-01-18 15:47:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6762 to 4808. [2022-01-18 15:47:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4808 states, 4807 states have (on average 4.4632827127106305) internal successors, (21455), 4807 states have internal predecessors, (21455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4808 states to 4808 states and 21455 transitions. [2022-01-18 15:47:28,648 INFO L78 Accepts]: Start accepts. Automaton has 4808 states and 21455 transitions. Word has length 30 [2022-01-18 15:47:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:28,648 INFO L470 AbstractCegarLoop]: Abstraction has 4808 states and 21455 transitions. [2022-01-18 15:47:28,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4808 states and 21455 transitions. [2022-01-18 15:47:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:28,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:28,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:28,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-18 15:47:28,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-01-18 15:47:28,870 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:28,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash -716705075, now seen corresponding path program 71 times [2022-01-18 15:47:28,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:28,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236990375] [2022-01-18 15:47:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:28,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:29,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:29,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236990375] [2022-01-18 15:47:29,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236990375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:29,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541512571] [2022-01-18 15:47:29,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:47:29,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:29,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:29,084 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) [2022-01-18 15:47:29,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 15:47:29,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:47:29,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:29,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:47:29,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:29,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:29,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:29,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:29,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:29,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:47:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:29,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:29,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:29,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:29,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:29,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:29,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:47:29,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:29,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:29,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:29,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:29,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 5 [2022-01-18 15:47:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:29,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541512571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:29,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:29,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-18 15:47:29,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818788169] [2022-01-18 15:47:29,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:29,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:47:29,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:29,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:47:29,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:47:29,958 INFO L87 Difference]: Start difference. First operand 4808 states and 21455 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:32,729 INFO L93 Difference]: Finished difference Result 7279 states and 31525 transitions. [2022-01-18 15:47:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:47:32,729 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:47:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:32,746 INFO L225 Difference]: With dead ends: 7279 [2022-01-18 15:47:32,746 INFO L226 Difference]: Without dead ends: 7048 [2022-01-18 15:47:32,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=607, Invalid=3949, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 15:47:32,747 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 550 mSDsluCounter, 1942 mSDsCounter, 0 mSdLazyCounter, 3130 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 4051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 3130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 784 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:32,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 224 Invalid, 4051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 3130 Invalid, 0 Unknown, 784 Unchecked, 1.4s Time] [2022-01-18 15:47:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7048 states. [2022-01-18 15:47:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7048 to 4906. [2022-01-18 15:47:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 4905 states have (on average 4.4650356778797144) internal successors, (21901), 4905 states have internal predecessors, (21901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 21901 transitions. [2022-01-18 15:47:32,840 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 21901 transitions. Word has length 30 [2022-01-18 15:47:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:32,840 INFO L470 AbstractCegarLoop]: Abstraction has 4906 states and 21901 transitions. [2022-01-18 15:47:32,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 21901 transitions. [2022-01-18 15:47:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:32,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:32,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:32,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-01-18 15:47:33,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:33,063 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1388137644, now seen corresponding path program 21 times [2022-01-18 15:47:33,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:33,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500463532] [2022-01-18 15:47:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:33,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:33,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:33,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500463532] [2022-01-18 15:47:33,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500463532] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:33,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187171620] [2022-01-18 15:47:33,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:47:33,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:33,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:33,317 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) [2022-01-18 15:47:33,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 15:47:33,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:47:33,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:47:33,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:33,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:33,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:33,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:33,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:33,696 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 [2022-01-18 15:47:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:33,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:34,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:34,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:34,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:34,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:34,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:47:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:34,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187171620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:34,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:34,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:47:34,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985771758] [2022-01-18 15:47:34,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:34,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:47:34,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:34,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:47:34,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:47:34,282 INFO L87 Difference]: Start difference. First operand 4906 states and 21901 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:38,726 INFO L93 Difference]: Finished difference Result 7815 states and 32705 transitions. [2022-01-18 15:47:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 15:47:38,726 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:47:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:38,745 INFO L225 Difference]: With dead ends: 7815 [2022-01-18 15:47:38,745 INFO L226 Difference]: Without dead ends: 7633 [2022-01-18 15:47:38,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=776, Invalid=6706, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 15:47:38,746 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 650 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 6199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2253 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:38,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 401 Invalid, 6199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 3704 Invalid, 0 Unknown, 2253 Unchecked, 1.7s Time] [2022-01-18 15:47:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2022-01-18 15:47:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 4928. [2022-01-18 15:47:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 4.462756241120357) internal successors, (21988), 4927 states have internal predecessors, (21988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:38,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 21988 transitions. [2022-01-18 15:47:38,852 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 21988 transitions. Word has length 30 [2022-01-18 15:47:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:38,852 INFO L470 AbstractCegarLoop]: Abstraction has 4928 states and 21988 transitions. [2022-01-18 15:47:38,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 21988 transitions. [2022-01-18 15:47:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:38,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:38,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:38,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-18 15:47:39,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:39,070 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:39,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:39,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1893696269, now seen corresponding path program 5 times [2022-01-18 15:47:39,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:39,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926545673] [2022-01-18 15:47:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:39,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:39,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:39,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926545673] [2022-01-18 15:47:39,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926545673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:39,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521318683] [2022-01-18 15:47:39,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:47:39,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:39,347 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) [2022-01-18 15:47:39,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 15:47:39,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:47:39,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:39,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:47:39,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:39,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:39,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:39,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:39,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 49 [2022-01-18 15:47:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:40,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:40,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:40,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:40,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:40,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:40,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:47:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:40,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521318683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:40,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:40,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:47:40,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360237117] [2022-01-18 15:47:40,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:40,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:47:40,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:40,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:47:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:47:40,838 INFO L87 Difference]: Start difference. First operand 4928 states and 21988 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:42,310 INFO L93 Difference]: Finished difference Result 6277 states and 27311 transitions. [2022-01-18 15:47:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 15:47:42,310 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:47:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:42,324 INFO L225 Difference]: With dead ends: 6277 [2022-01-18 15:47:42,324 INFO L226 Difference]: Without dead ends: 6236 [2022-01-18 15:47:42,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=399, Invalid=2681, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 15:47:42,325 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 276 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 3833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2404 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:42,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 359 Invalid, 3833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1324 Invalid, 0 Unknown, 2404 Unchecked, 0.6s Time] [2022-01-18 15:47:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2022-01-18 15:47:42,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 4946. [2022-01-18 15:47:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4946 states, 4945 states have (on average 4.459656218402427) internal successors, (22053), 4945 states have internal predecessors, (22053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4946 states to 4946 states and 22053 transitions. [2022-01-18 15:47:42,416 INFO L78 Accepts]: Start accepts. Automaton has 4946 states and 22053 transitions. Word has length 30 [2022-01-18 15:47:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:42,417 INFO L470 AbstractCegarLoop]: Abstraction has 4946 states and 22053 transitions. [2022-01-18 15:47:42,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4946 states and 22053 transitions. [2022-01-18 15:47:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:42,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:42,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:42,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-01-18 15:47:42,632 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,SelfDestructingSolverStorable209 [2022-01-18 15:47:42,632 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:42,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:42,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1299431135, now seen corresponding path program 6 times [2022-01-18 15:47:42,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:42,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823305701] [2022-01-18 15:47:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:42,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:42,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823305701] [2022-01-18 15:47:42,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823305701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583446022] [2022-01-18 15:47:42,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:47:42,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:42,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:42,869 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) [2022-01-18 15:47:42,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 15:47:42,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:47:42,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:42,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:47:42,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:43,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:43,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:43,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:43,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-01-18 15:47:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:43,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:48,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:48,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:48,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:48,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:48,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-01-18 15:47:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:48,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583446022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:48,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:48,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:47:48,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440359329] [2022-01-18 15:47:48,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:48,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:47:48,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:48,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:47:48,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=862, Unknown=2, NotChecked=0, Total=992 [2022-01-18 15:47:48,356 INFO L87 Difference]: Start difference. First operand 4946 states and 22053 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:49,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:49,630 INFO L93 Difference]: Finished difference Result 6252 states and 27246 transitions. [2022-01-18 15:47:49,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 15:47:49,630 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:47:49,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:49,646 INFO L225 Difference]: With dead ends: 6252 [2022-01-18 15:47:49,646 INFO L226 Difference]: Without dead ends: 6229 [2022-01-18 15:47:49,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=387, Invalid=2473, Unknown=2, NotChecked=0, Total=2862 [2022-01-18 15:47:49,646 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 291 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2090 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:49,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 185 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 857 Invalid, 0 Unknown, 2090 Unchecked, 0.4s Time] [2022-01-18 15:47:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6229 states. [2022-01-18 15:47:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6229 to 4946. [2022-01-18 15:47:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4946 states, 4945 states have (on average 4.459453993933266) internal successors, (22052), 4945 states have internal predecessors, (22052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4946 states to 4946 states and 22052 transitions. [2022-01-18 15:47:49,741 INFO L78 Accepts]: Start accepts. Automaton has 4946 states and 22052 transitions. Word has length 30 [2022-01-18 15:47:49,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:49,741 INFO L470 AbstractCegarLoop]: Abstraction has 4946 states and 22052 transitions. [2022-01-18 15:47:49,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 4946 states and 22052 transitions. [2022-01-18 15:47:49,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:49,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:49,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:49,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-01-18 15:47:49,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:49,965 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:49,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:49,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1198584802, now seen corresponding path program 2 times [2022-01-18 15:47:49,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:49,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938402748] [2022-01-18 15:47:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:49,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:50,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:50,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938402748] [2022-01-18 15:47:50,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938402748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:50,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287647149] [2022-01-18 15:47:50,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:47:50,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:50,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:50,244 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) [2022-01-18 15:47:50,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 15:47:50,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:47:50,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:47:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:50,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:50,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:50,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:50,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 15:47:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:50,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:51,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:51,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:51,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:51,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-01-18 15:47:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:51,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287647149] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:51,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:51,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-01-18 15:47:51,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339381088] [2022-01-18 15:47:51,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:51,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:47:51,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:51,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:47:51,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:47:51,581 INFO L87 Difference]: Start difference. First operand 4946 states and 22052 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:53,937 INFO L93 Difference]: Finished difference Result 6613 states and 28817 transitions. [2022-01-18 15:47:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:47:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:47:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:53,955 INFO L225 Difference]: With dead ends: 6613 [2022-01-18 15:47:53,955 INFO L226 Difference]: Without dead ends: 6529 [2022-01-18 15:47:53,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=511, Invalid=3149, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 15:47:53,956 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 344 mSDsluCounter, 2188 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2563 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:53,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 256 Invalid, 4321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1667 Invalid, 0 Unknown, 2563 Unchecked, 0.7s Time] [2022-01-18 15:47:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6529 states. [2022-01-18 15:47:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6529 to 4943. [2022-01-18 15:47:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4943 states, 4942 states have (on average 4.460542290570619) internal successors, (22044), 4942 states have internal predecessors, (22044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 22044 transitions. [2022-01-18 15:47:54,108 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 22044 transitions. Word has length 30 [2022-01-18 15:47:54,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:54,108 INFO L470 AbstractCegarLoop]: Abstraction has 4943 states and 22044 transitions. [2022-01-18 15:47:54,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 22044 transitions. [2022-01-18 15:47:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:54,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:54,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:54,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-01-18 15:47:54,332 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,SelfDestructingSolverStorable211 [2022-01-18 15:47:54,332 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:54,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1156420976, now seen corresponding path program 22 times [2022-01-18 15:47:54,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:54,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523368253] [2022-01-18 15:47:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:54,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:54,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:54,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523368253] [2022-01-18 15:47:54,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523368253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:54,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197505176] [2022-01-18 15:47:54,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:47:54,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:54,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:54,556 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) [2022-01-18 15:47:54,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 15:47:54,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:47:54,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:54,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:47:54,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:54,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:54,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:54,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:54,883 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:47:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:54,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:55,161 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:47:55,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:47:55,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:55,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:55,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:47:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:55,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197505176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:55,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:55,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:47:55,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373043542] [2022-01-18 15:47:55,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:55,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:47:55,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:55,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:47:55,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:47:55,212 INFO L87 Difference]: Start difference. First operand 4943 states and 22044 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:56,512 INFO L93 Difference]: Finished difference Result 6203 states and 27049 transitions. [2022-01-18 15:47:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:47:56,512 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:47:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:56,527 INFO L225 Difference]: With dead ends: 6203 [2022-01-18 15:47:56,527 INFO L226 Difference]: Without dead ends: 6086 [2022-01-18 15:47:56,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:47:56,528 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 280 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:56,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 242 Invalid, 3339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2575 Invalid, 0 Unknown, 659 Unchecked, 0.9s Time] [2022-01-18 15:47:56,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2022-01-18 15:47:56,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4949. [2022-01-18 15:47:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 4.459983831851253) internal successors, (22068), 4948 states have internal predecessors, (22068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 22068 transitions. [2022-01-18 15:47:56,618 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 22068 transitions. Word has length 30 [2022-01-18 15:47:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:56,619 INFO L470 AbstractCegarLoop]: Abstraction has 4949 states and 22068 transitions. [2022-01-18 15:47:56,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 22068 transitions. [2022-01-18 15:47:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:56,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:56,628 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:56,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-01-18 15:47:56,843 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,SelfDestructingSolverStorable212 [2022-01-18 15:47:56,843 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:56,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1662767242, now seen corresponding path program 23 times [2022-01-18 15:47:56,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:56,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111200472] [2022-01-18 15:47:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:56,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:57,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:57,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111200472] [2022-01-18 15:47:57,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111200472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:57,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425933431] [2022-01-18 15:47:57,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:47:57,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:57,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:57,063 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) [2022-01-18 15:47:57,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 15:47:57,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:47:57,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:57,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 15:47:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:57,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:57,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:57,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:57,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2022-01-18 15:47:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:57,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:58,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:58,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:58,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:58,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:58,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:47:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:58,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425933431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:58,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:58,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:47:58,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911022391] [2022-01-18 15:47:58,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:58,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:47:58,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:58,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:47:58,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:47:58,041 INFO L87 Difference]: Start difference. First operand 4949 states and 22068 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:59,403 INFO L93 Difference]: Finished difference Result 6497 states and 28044 transitions. [2022-01-18 15:47:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 15:47:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:47:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:59,417 INFO L225 Difference]: With dead ends: 6497 [2022-01-18 15:47:59,417 INFO L226 Difference]: Without dead ends: 6406 [2022-01-18 15:47:59,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:47:59,418 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 462 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 3753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2332 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:59,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 246 Invalid, 3753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1282 Invalid, 0 Unknown, 2332 Unchecked, 0.4s Time] [2022-01-18 15:47:59,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6406 states. [2022-01-18 15:47:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6406 to 4959. [2022-01-18 15:47:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 4958 states have (on average 4.45824929407019) internal successors, (22104), 4958 states have internal predecessors, (22104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 22104 transitions. [2022-01-18 15:47:59,510 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 22104 transitions. Word has length 30 [2022-01-18 15:47:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:59,510 INFO L470 AbstractCegarLoop]: Abstraction has 4959 states and 22104 transitions. [2022-01-18 15:47:59,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 22104 transitions. [2022-01-18 15:47:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:47:59,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:59,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:59,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-18 15:47:59,724 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,SelfDestructingSolverStorable213 [2022-01-18 15:47:59,724 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:47:59,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:59,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2126641429, now seen corresponding path program 4 times [2022-01-18 15:47:59,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:59,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133168807] [2022-01-18 15:47:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:59,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:59,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:59,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133168807] [2022-01-18 15:47:59,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133168807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:59,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419160944] [2022-01-18 15:47:59,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:47:59,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:59,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:59,944 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) [2022-01-18 15:47:59,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 15:47:59,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:47:59,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:59,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:47:59,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:00,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:00,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:00,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:00,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:48:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:00,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:00,494 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:00,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:48:00,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:00,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:00,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:00,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:00,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:48:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:00,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419160944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:00,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:00,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:48:00,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52132629] [2022-01-18 15:48:00,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:00,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:48:00,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:00,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:48:00,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:48:00,549 INFO L87 Difference]: Start difference. First operand 4959 states and 22104 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:01,566 INFO L93 Difference]: Finished difference Result 5648 states and 24814 transitions. [2022-01-18 15:48:01,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:48:01,566 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:48:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:01,581 INFO L225 Difference]: With dead ends: 5648 [2022-01-18 15:48:01,581 INFO L226 Difference]: Without dead ends: 5584 [2022-01-18 15:48:01,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=1159, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:48:01,595 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 190 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:01,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 153 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1793 Invalid, 0 Unknown, 311 Unchecked, 0.7s Time] [2022-01-18 15:48:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2022-01-18 15:48:01,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 4959. [2022-01-18 15:48:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 4958 states have (on average 4.45824929407019) internal successors, (22104), 4958 states have internal predecessors, (22104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 22104 transitions. [2022-01-18 15:48:01,725 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 22104 transitions. Word has length 30 [2022-01-18 15:48:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:01,725 INFO L470 AbstractCegarLoop]: Abstraction has 4959 states and 22104 transitions. [2022-01-18 15:48:01,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 22104 transitions. [2022-01-18 15:48:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:01,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:01,736 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:01,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:01,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:01,959 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:01,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash 988372752, now seen corresponding path program 24 times [2022-01-18 15:48:01,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:01,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719720033] [2022-01-18 15:48:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:01,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:02,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:02,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719720033] [2022-01-18 15:48:02,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719720033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:02,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061091966] [2022-01-18 15:48:02,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:48:02,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:02,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:02,271 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) [2022-01-18 15:48:02,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 15:48:02,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:48:02,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:02,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:48:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:02,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:02,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:02,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:02,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:48:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:02,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:03,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:03,433 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:48:03,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 59 [2022-01-18 15:48:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:03,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061091966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:03,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:03,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-01-18 15:48:03,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139321936] [2022-01-18 15:48:03,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:03,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:48:03,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:03,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:48:03,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:48:03,568 INFO L87 Difference]: Start difference. First operand 4959 states and 22104 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:05,630 INFO L93 Difference]: Finished difference Result 5571 states and 24357 transitions. [2022-01-18 15:48:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:48:05,630 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:48:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:05,645 INFO L225 Difference]: With dead ends: 5571 [2022-01-18 15:48:05,645 INFO L226 Difference]: Without dead ends: 5449 [2022-01-18 15:48:05,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=318, Invalid=2334, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:48:05,645 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 381 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1063 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:05,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 145 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1736 Invalid, 0 Unknown, 1063 Unchecked, 0.9s Time] [2022-01-18 15:48:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2022-01-18 15:48:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 4987. [2022-01-18 15:48:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4987 states, 4986 states have (on average 4.453068592057762) internal successors, (22203), 4986 states have internal predecessors, (22203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4987 states to 4987 states and 22203 transitions. [2022-01-18 15:48:05,745 INFO L78 Accepts]: Start accepts. Automaton has 4987 states and 22203 transitions. Word has length 30 [2022-01-18 15:48:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:05,745 INFO L470 AbstractCegarLoop]: Abstraction has 4987 states and 22203 transitions. [2022-01-18 15:48:05,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4987 states and 22203 transitions. [2022-01-18 15:48:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:05,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:05,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:05,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:05,970 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,SelfDestructingSolverStorable215 [2022-01-18 15:48:05,971 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:05,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:05,971 INFO L85 PathProgramCache]: Analyzing trace with hash -195058706, now seen corresponding path program 25 times [2022-01-18 15:48:05,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:05,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225347877] [2022-01-18 15:48:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:05,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:06,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:06,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225347877] [2022-01-18 15:48:06,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225347877] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:06,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804317165] [2022-01-18 15:48:06,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:48:06,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:06,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:06,182 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) [2022-01-18 15:48:06,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 15:48:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:06,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:48:06,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:06,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:06,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:06,380 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 [2022-01-18 15:48:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:06,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:06,634 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:06,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:48:06,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:06,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:06,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:06,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:06,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:48:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:06,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804317165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:06,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:06,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:48:06,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559268105] [2022-01-18 15:48:06,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:06,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:48:06,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:06,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:48:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:48:06,704 INFO L87 Difference]: Start difference. First operand 4987 states and 22203 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) [2022-01-18 15:48:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:08,131 INFO L93 Difference]: Finished difference Result 5640 states and 24823 transitions. [2022-01-18 15:48:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:48:08,132 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 30 [2022-01-18 15:48:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:08,144 INFO L225 Difference]: With dead ends: 5640 [2022-01-18 15:48:08,144 INFO L226 Difference]: Without dead ends: 5563 [2022-01-18 15:48:08,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 15:48:08,145 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 210 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:08,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 111 Invalid, 2356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2075 Invalid, 0 Unknown, 179 Unchecked, 0.9s Time] [2022-01-18 15:48:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2022-01-18 15:48:08,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5000. [2022-01-18 15:48:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5000 states, 4999 states have (on average 4.451490298059612) internal successors, (22253), 4999 states have internal predecessors, (22253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5000 states to 5000 states and 22253 transitions. [2022-01-18 15:48:08,224 INFO L78 Accepts]: Start accepts. Automaton has 5000 states and 22253 transitions. Word has length 30 [2022-01-18 15:48:08,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:08,224 INFO L470 AbstractCegarLoop]: Abstraction has 5000 states and 22253 transitions. [2022-01-18 15:48:08,224 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) [2022-01-18 15:48:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 5000 states and 22253 transitions. [2022-01-18 15:48:08,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:08,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:08,233 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:08,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:08,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:08,448 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:08,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:08,448 INFO L85 PathProgramCache]: Analyzing trace with hash -770917910, now seen corresponding path program 26 times [2022-01-18 15:48:08,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:08,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347058790] [2022-01-18 15:48:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:08,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:08,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347058790] [2022-01-18 15:48:08,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347058790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261755690] [2022-01-18 15:48:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:48:08,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:08,668 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) [2022-01-18 15:48:08,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 15:48:08,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:48:08,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:08,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:48:08,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:08,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:08,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:08,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:08,929 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 30 treesize of output 16 [2022-01-18 15:48:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:09,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:09,274 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:09,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:48:09,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:09,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:09,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:09,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:09,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:48:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:09,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261755690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:09,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:09,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:48:09,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111180810] [2022-01-18 15:48:09,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:09,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:48:09,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:48:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:48:09,363 INFO L87 Difference]: Start difference. First operand 5000 states and 22253 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:48:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:10,479 INFO L93 Difference]: Finished difference Result 5571 states and 24500 transitions. [2022-01-18 15:48:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:48:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 30 [2022-01-18 15:48:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:10,492 INFO L225 Difference]: With dead ends: 5571 [2022-01-18 15:48:10,492 INFO L226 Difference]: Without dead ends: 5498 [2022-01-18 15:48:10,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:48:10,492 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 445 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:10,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 140 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2024 Invalid, 0 Unknown, 445 Unchecked, 0.8s Time] [2022-01-18 15:48:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5498 states. [2022-01-18 15:48:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5498 to 5008. [2022-01-18 15:48:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5008 states, 5007 states have (on average 4.450569203115638) internal successors, (22284), 5007 states have internal predecessors, (22284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5008 states to 5008 states and 22284 transitions. [2022-01-18 15:48:10,572 INFO L78 Accepts]: Start accepts. Automaton has 5008 states and 22284 transitions. Word has length 30 [2022-01-18 15:48:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:10,572 INFO L470 AbstractCegarLoop]: Abstraction has 5008 states and 22284 transitions. [2022-01-18 15:48:10,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:48:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5008 states and 22284 transitions. [2022-01-18 15:48:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:10,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:10,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:10,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:10,795 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,SelfDestructingSolverStorable217 [2022-01-18 15:48:10,796 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:10,796 INFO L85 PathProgramCache]: Analyzing trace with hash 709435542, now seen corresponding path program 27 times [2022-01-18 15:48:10,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:10,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572448128] [2022-01-18 15:48:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:10,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:11,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572448128] [2022-01-18 15:48:11,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572448128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088249192] [2022-01-18 15:48:11,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:48:11,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:11,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:11,012 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) [2022-01-18 15:48:11,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 15:48:11,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:48:11,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:11,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:48:11,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:11,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:11,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:11,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:11,259 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 15:48:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:11,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:11,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:11,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:11,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:11,877 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 48 treesize of output 65 [2022-01-18 15:48:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:12,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088249192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:12,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:12,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-01-18 15:48:12,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244774614] [2022-01-18 15:48:12,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:12,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:48:12,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:12,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:48:12,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:48:12,062 INFO L87 Difference]: Start difference. First operand 5008 states and 22284 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:16,570 INFO L93 Difference]: Finished difference Result 7278 states and 31289 transitions. [2022-01-18 15:48:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 15:48:16,570 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:48:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:16,590 INFO L225 Difference]: With dead ends: 7278 [2022-01-18 15:48:16,590 INFO L226 Difference]: Without dead ends: 7128 [2022-01-18 15:48:16,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3640 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1326, Invalid=10230, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 15:48:16,592 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 426 mSDsluCounter, 2522 mSDsCounter, 0 mSdLazyCounter, 3565 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 5919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2189 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:16,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 268 Invalid, 5919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3565 Invalid, 0 Unknown, 2189 Unchecked, 1.4s Time] [2022-01-18 15:48:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7128 states. [2022-01-18 15:48:16,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7128 to 5030. [2022-01-18 15:48:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5029 states have (on average 4.4485981308411215) internal successors, (22372), 5029 states have internal predecessors, (22372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 22372 transitions. [2022-01-18 15:48:16,728 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 22372 transitions. Word has length 30 [2022-01-18 15:48:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:16,728 INFO L470 AbstractCegarLoop]: Abstraction has 5030 states and 22372 transitions. [2022-01-18 15:48:16,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 22372 transitions. [2022-01-18 15:48:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:16,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:16,740 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:16,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:16,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:16,940 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:16,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1357713238, now seen corresponding path program 28 times [2022-01-18 15:48:16,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:16,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384667923] [2022-01-18 15:48:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:16,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:17,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384667923] [2022-01-18 15:48:17,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384667923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026279001] [2022-01-18 15:48:17,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:48:17,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:17,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:17,212 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) [2022-01-18 15:48:17,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 15:48:17,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:48:17,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:17,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:48:17,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:17,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:17,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:17,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:17,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:48:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:17,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:17,902 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:17,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:48:17,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:17,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:17,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:17,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:17,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:48:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:17,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026279001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:17,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:17,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:48:17,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357453289] [2022-01-18 15:48:17,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:17,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:48:17,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:48:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:48:17,986 INFO L87 Difference]: Start difference. First operand 5030 states and 22372 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) [2022-01-18 15:48:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:19,185 INFO L93 Difference]: Finished difference Result 5632 states and 24740 transitions. [2022-01-18 15:48:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:48:19,186 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 30 [2022-01-18 15:48:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:19,199 INFO L225 Difference]: With dead ends: 5632 [2022-01-18 15:48:19,199 INFO L226 Difference]: Without dead ends: 5557 [2022-01-18 15:48:19,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:48:19,200 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 215 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:19,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 163 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2131 Invalid, 0 Unknown, 316 Unchecked, 0.7s Time] [2022-01-18 15:48:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5557 states. [2022-01-18 15:48:19,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5557 to 5035. [2022-01-18 15:48:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5035 states, 5034 states have (on average 4.44854986094557) internal successors, (22394), 5034 states have internal predecessors, (22394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 22394 transitions. [2022-01-18 15:48:19,294 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 22394 transitions. Word has length 30 [2022-01-18 15:48:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:19,294 INFO L470 AbstractCegarLoop]: Abstraction has 5035 states and 22394 transitions. [2022-01-18 15:48:19,294 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) [2022-01-18 15:48:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 22394 transitions. [2022-01-18 15:48:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:19,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:19,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:19,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:19,518 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,SelfDestructingSolverStorable219 [2022-01-18 15:48:19,519 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:19,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1192890052, now seen corresponding path program 29 times [2022-01-18 15:48:19,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:19,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018354129] [2022-01-18 15:48:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:19,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:19,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:19,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018354129] [2022-01-18 15:48:19,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018354129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:19,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714556041] [2022-01-18 15:48:19,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:48:19,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:19,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:19,664 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) [2022-01-18 15:48:19,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 15:48:19,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:48:19,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:19,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 15:48:19,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:19,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:19,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:19,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2022-01-18 15:48:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:19,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:20,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:20,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:20,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:48:20,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:20,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:20,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:20,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:48:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:20,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714556041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:20,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:20,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-01-18 15:48:20,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301268126] [2022-01-18 15:48:20,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:20,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:48:20,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:48:20,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:48:20,351 INFO L87 Difference]: Start difference. First operand 5035 states and 22394 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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) [2022-01-18 15:48:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:24,548 INFO L93 Difference]: Finished difference Result 7824 states and 32679 transitions. [2022-01-18 15:48:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 15:48:24,549 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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 30 [2022-01-18 15:48:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:24,571 INFO L225 Difference]: With dead ends: 7824 [2022-01-18 15:48:24,571 INFO L226 Difference]: Without dead ends: 7679 [2022-01-18 15:48:24,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1146, Invalid=7410, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 15:48:24,572 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 813 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 3919 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 4273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 3919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:24,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 294 Invalid, 4273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 3919 Invalid, 0 Unknown, 44 Unchecked, 1.8s Time] [2022-01-18 15:48:24,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2022-01-18 15:48:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 5072. [2022-01-18 15:48:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5072 states, 5071 states have (on average 4.443896667323999) internal successors, (22535), 5071 states have internal predecessors, (22535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:24,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5072 states to 5072 states and 22535 transitions. [2022-01-18 15:48:24,686 INFO L78 Accepts]: Start accepts. Automaton has 5072 states and 22535 transitions. Word has length 30 [2022-01-18 15:48:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:24,686 INFO L470 AbstractCegarLoop]: Abstraction has 5072 states and 22535 transitions. [2022-01-18 15:48:24,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 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) [2022-01-18 15:48:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5072 states and 22535 transitions. [2022-01-18 15:48:24,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:24,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:24,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:24,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:24,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:24,912 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash -469674318, now seen corresponding path program 30 times [2022-01-18 15:48:24,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:24,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123231079] [2022-01-18 15:48:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:24,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:25,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:25,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123231079] [2022-01-18 15:48:25,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123231079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:25,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393505523] [2022-01-18 15:48:25,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:48:25,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:25,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:25,080 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) [2022-01-18 15:48:25,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 15:48:25,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:48:25,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:25,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:48:25,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:25,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:25,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:25,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:25,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2022-01-18 15:48:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:25,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:25,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:25,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:25,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:25,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:25,978 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 44 treesize of output 9 [2022-01-18 15:48:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:25,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393505523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:25,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:25,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 33 [2022-01-18 15:48:25,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925040328] [2022-01-18 15:48:25,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:25,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:48:25,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:25,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:48:25,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:48:25,995 INFO L87 Difference]: Start difference. First operand 5072 states and 22535 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:30,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:30,720 INFO L93 Difference]: Finished difference Result 8523 states and 35188 transitions. [2022-01-18 15:48:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 15:48:30,721 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:48:30,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:30,741 INFO L225 Difference]: With dead ends: 8523 [2022-01-18 15:48:30,741 INFO L226 Difference]: Without dead ends: 8081 [2022-01-18 15:48:30,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1188, Invalid=8124, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 15:48:30,742 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 915 mSDsluCounter, 2797 mSDsCounter, 0 mSdLazyCounter, 3923 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 6075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 3923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1823 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:30,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 334 Invalid, 6075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 3923 Invalid, 0 Unknown, 1823 Unchecked, 1.7s Time] [2022-01-18 15:48:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8081 states. [2022-01-18 15:48:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8081 to 5126. [2022-01-18 15:48:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5126 states, 5125 states have (on average 4.445268292682927) internal successors, (22782), 5125 states have internal predecessors, (22782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5126 states to 5126 states and 22782 transitions. [2022-01-18 15:48:30,917 INFO L78 Accepts]: Start accepts. Automaton has 5126 states and 22782 transitions. Word has length 30 [2022-01-18 15:48:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:30,917 INFO L470 AbstractCegarLoop]: Abstraction has 5126 states and 22782 transitions. [2022-01-18 15:48:30,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5126 states and 22782 transitions. [2022-01-18 15:48:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:30,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:30,926 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:30,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:31,142 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,SelfDestructingSolverStorable221 [2022-01-18 15:48:31,142 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:31,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:31,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1653105776, now seen corresponding path program 31 times [2022-01-18 15:48:31,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:31,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782603856] [2022-01-18 15:48:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:31,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:31,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782603856] [2022-01-18 15:48:31,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782603856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:31,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636981283] [2022-01-18 15:48:31,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:48:31,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:31,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:31,324 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) [2022-01-18 15:48:31,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 15:48:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:31,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:48:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:31,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:48:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:31,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:31,963 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:31,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:48:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:32,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636981283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:32,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:32,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:48:32,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564986601] [2022-01-18 15:48:32,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:32,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:48:32,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:32,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:48:32,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:48:32,060 INFO L87 Difference]: Start difference. First operand 5126 states and 22782 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) [2022-01-18 15:48:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:34,201 INFO L93 Difference]: Finished difference Result 6641 states and 28914 transitions. [2022-01-18 15:48:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:48:34,201 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 30 [2022-01-18 15:48:34,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:34,218 INFO L225 Difference]: With dead ends: 6641 [2022-01-18 15:48:34,218 INFO L226 Difference]: Without dead ends: 6558 [2022-01-18 15:48:34,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=456, Invalid=2966, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 15:48:34,219 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 312 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 3100 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 3100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:34,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 157 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 3100 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 15:48:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6558 states. [2022-01-18 15:48:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6558 to 5122. [2022-01-18 15:48:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5122 states, 5121 states have (on average 4.445225541886351) internal successors, (22764), 5121 states have internal predecessors, (22764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5122 states to 5122 states and 22764 transitions. [2022-01-18 15:48:34,314 INFO L78 Accepts]: Start accepts. Automaton has 5122 states and 22764 transitions. Word has length 30 [2022-01-18 15:48:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:34,314 INFO L470 AbstractCegarLoop]: Abstraction has 5122 states and 22764 transitions. [2022-01-18 15:48:34,315 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) [2022-01-18 15:48:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 5122 states and 22764 transitions. [2022-01-18 15:48:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:34,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:34,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:34,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:34,539 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,SelfDestructingSolverStorable222 [2022-01-18 15:48:34,539 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:34,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1917752154, now seen corresponding path program 32 times [2022-01-18 15:48:34,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:34,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428383539] [2022-01-18 15:48:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:34,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:34,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428383539] [2022-01-18 15:48:34,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428383539] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102531106] [2022-01-18 15:48:34,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:48:34,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:34,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:34,712 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) [2022-01-18 15:48:34,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 15:48:34,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:48:34,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:34,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:48:34,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:34,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 15:48:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:35,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:35,238 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:35,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:48:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:35,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102531106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:35,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:35,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:48:35,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839899278] [2022-01-18 15:48:35,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:35,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:48:35,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:48:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:48:35,323 INFO L87 Difference]: Start difference. First operand 5122 states and 22764 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) [2022-01-18 15:48:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:37,780 INFO L93 Difference]: Finished difference Result 6848 states and 29746 transitions. [2022-01-18 15:48:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:48:37,781 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 30 [2022-01-18 15:48:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:37,796 INFO L225 Difference]: With dead ends: 6848 [2022-01-18 15:48:37,797 INFO L226 Difference]: Without dead ends: 6666 [2022-01-18 15:48:37,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=376, Invalid=2594, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:48:37,797 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 329 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 4247 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 4464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 4247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:37,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 236 Invalid, 4464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 4247 Invalid, 0 Unknown, 23 Unchecked, 1.5s Time] [2022-01-18 15:48:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6666 states. [2022-01-18 15:48:37,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6666 to 5149. [2022-01-18 15:48:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5149 states, 5148 states have (on average 4.4438616938616935) internal successors, (22877), 5148 states have internal predecessors, (22877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5149 states to 5149 states and 22877 transitions. [2022-01-18 15:48:37,897 INFO L78 Accepts]: Start accepts. Automaton has 5149 states and 22877 transitions. Word has length 30 [2022-01-18 15:48:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:37,897 INFO L470 AbstractCegarLoop]: Abstraction has 5149 states and 22877 transitions. [2022-01-18 15:48:37,897 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) [2022-01-18 15:48:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 5149 states and 22877 transitions. [2022-01-18 15:48:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:37,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:37,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:37,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-01-18 15:48:38,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-01-18 15:48:38,123 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1246319585, now seen corresponding path program 29 times [2022-01-18 15:48:38,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:38,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269588328] [2022-01-18 15:48:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:38,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:38,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:38,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269588328] [2022-01-18 15:48:38,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269588328] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:38,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110076697] [2022-01-18 15:48:38,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:48:38,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:38,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:38,362 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) [2022-01-18 15:48:38,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 15:48:38,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:48:38,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 15:48:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:38,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:38,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:38,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:38,732 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2022-01-18 15:48:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:38,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:39,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:39,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:39,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:39,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:39,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:48:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:39,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110076697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:39,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:39,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-01-18 15:48:39,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246756742] [2022-01-18 15:48:39,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:39,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:48:39,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:39,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:48:39,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:48:39,174 INFO L87 Difference]: Start difference. First operand 5149 states and 22877 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:43,366 INFO L93 Difference]: Finished difference Result 10213 states and 41810 transitions. [2022-01-18 15:48:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-18 15:48:43,367 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:48:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:43,391 INFO L225 Difference]: With dead ends: 10213 [2022-01-18 15:48:43,391 INFO L226 Difference]: Without dead ends: 9918 [2022-01-18 15:48:43,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 41 SyntacticMatches, 10 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4614 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1778, Invalid=10654, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 15:48:43,393 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 783 mSDsluCounter, 2422 mSDsCounter, 0 mSdLazyCounter, 3302 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 5008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 3302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1393 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:43,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 367 Invalid, 5008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 3302 Invalid, 0 Unknown, 1393 Unchecked, 1.3s Time] [2022-01-18 15:48:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9918 states. [2022-01-18 15:48:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9918 to 5255. [2022-01-18 15:48:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5255 states, 5254 states have (on average 4.445184621240959) internal successors, (23355), 5254 states have internal predecessors, (23355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 23355 transitions. [2022-01-18 15:48:43,549 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 23355 transitions. Word has length 30 [2022-01-18 15:48:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:43,550 INFO L470 AbstractCegarLoop]: Abstraction has 5255 states and 23355 transitions. [2022-01-18 15:48:43,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 23355 transitions. [2022-01-18 15:48:43,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:43,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:43,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:43,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:43,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:43,767 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash 323705905, now seen corresponding path program 30 times [2022-01-18 15:48:43,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:43,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330491934] [2022-01-18 15:48:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:43,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:43,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:43,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330491934] [2022-01-18 15:48:43,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330491934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:43,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242346132] [2022-01-18 15:48:43,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:48:43,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:43,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:43,957 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) [2022-01-18 15:48:43,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 15:48:43,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:48:43,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:48:43,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:44,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 15:48:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:44,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:44,449 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:44,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:48:44,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:44,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:44,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:44,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:44,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:48:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:44,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242346132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:44,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:44,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 15:48:44,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509757524] [2022-01-18 15:48:44,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:44,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:48:44,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:48:44,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:48:44,537 INFO L87 Difference]: Start difference. First operand 5255 states and 23355 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2022-01-18 15:48:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:46,502 INFO L93 Difference]: Finished difference Result 6874 states and 29886 transitions. [2022-01-18 15:48:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:48:46,502 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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 30 [2022-01-18 15:48:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:46,522 INFO L225 Difference]: With dead ends: 6874 [2022-01-18 15:48:46,522 INFO L226 Difference]: Without dead ends: 6792 [2022-01-18 15:48:46,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=393, Invalid=2799, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:48:46,523 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 314 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 2550 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:46,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 145 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2550 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 15:48:46,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6792 states. [2022-01-18 15:48:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6792 to 5257. [2022-01-18 15:48:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5256 states have (on average 4.4455859969558595) internal successors, (23366), 5256 states have internal predecessors, (23366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 23366 transitions. [2022-01-18 15:48:46,643 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 23366 transitions. Word has length 30 [2022-01-18 15:48:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:46,643 INFO L470 AbstractCegarLoop]: Abstraction has 5257 states and 23366 transitions. [2022-01-18 15:48:46,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2022-01-18 15:48:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 23366 transitions. [2022-01-18 15:48:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:46,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:46,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:46,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-01-18 15:48:46,860 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,SelfDestructingSolverStorable225 [2022-01-18 15:48:46,860 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1804059357, now seen corresponding path program 31 times [2022-01-18 15:48:46,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:46,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935514872] [2022-01-18 15:48:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:46,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:47,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:47,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935514872] [2022-01-18 15:48:47,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935514872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:47,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574999567] [2022-01-18 15:48:47,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:48:47,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:47,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:47,125 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) [2022-01-18 15:48:47,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 15:48:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:47,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:48:47,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:47,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 15:48:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:47,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:47,591 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:47,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:48:47,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:47,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:47,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:47,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:47,631 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 25 treesize of output 3 [2022-01-18 15:48:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:47,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574999567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:47,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:47,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:48:47,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902911031] [2022-01-18 15:48:47,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:47,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:48:47,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:47,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:48:47,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:48:47,657 INFO L87 Difference]: Start difference. First operand 5257 states and 23366 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-01-18 15:48:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:49,609 INFO L93 Difference]: Finished difference Result 6722 states and 29274 transitions. [2022-01-18 15:48:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:48:49,609 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 30 [2022-01-18 15:48:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:49,626 INFO L225 Difference]: With dead ends: 6722 [2022-01-18 15:48:49,626 INFO L226 Difference]: Without dead ends: 6639 [2022-01-18 15:48:49,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:48:49,627 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 238 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 2950 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:49,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 180 Invalid, 3076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2950 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 15:48:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2022-01-18 15:48:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 5248. [2022-01-18 15:48:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5248 states, 5247 states have (on average 4.44673146559939) internal successors, (23332), 5247 states have internal predecessors, (23332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5248 states to 5248 states and 23332 transitions. [2022-01-18 15:48:49,735 INFO L78 Accepts]: Start accepts. Automaton has 5248 states and 23332 transitions. Word has length 30 [2022-01-18 15:48:49,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:49,736 INFO L470 AbstractCegarLoop]: Abstraction has 5248 states and 23332 transitions. [2022-01-18 15:48:49,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-01-18 15:48:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 5248 states and 23332 transitions. [2022-01-18 15:48:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:49,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:49,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:49,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:49,971 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,SelfDestructingSolverStorable226 [2022-01-18 15:48:49,971 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:49,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1394169556, now seen corresponding path program 33 times [2022-01-18 15:48:49,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:49,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21070270] [2022-01-18 15:48:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:49,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:50,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:50,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21070270] [2022-01-18 15:48:50,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21070270] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:50,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545855960] [2022-01-18 15:48:50,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:48:50,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:50,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:50,307 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) [2022-01-18 15:48:50,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 15:48:50,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:48:50,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:50,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:48:50,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:50,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:48:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:50,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:50,866 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:50,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:48:50,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:50,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:50,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:50,929 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 25 treesize of output 3 [2022-01-18 15:48:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:50,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545855960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:50,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:50,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 15:48:50,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714847250] [2022-01-18 15:48:50,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:50,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:48:50,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:50,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:48:50,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:48:50,970 INFO L87 Difference]: Start difference. First operand 5248 states and 23332 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2022-01-18 15:48:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:53,069 INFO L93 Difference]: Finished difference Result 6631 states and 28908 transitions. [2022-01-18 15:48:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:48:53,070 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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 30 [2022-01-18 15:48:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:53,087 INFO L225 Difference]: With dead ends: 6631 [2022-01-18 15:48:53,088 INFO L226 Difference]: Without dead ends: 6558 [2022-01-18 15:48:53,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=318, Invalid=2232, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:48:53,089 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 290 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 2904 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 3064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:53,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 153 Invalid, 3064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2904 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 15:48:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6558 states. [2022-01-18 15:48:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6558 to 5257. [2022-01-18 15:48:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5256 states have (on average 4.446917808219178) internal successors, (23373), 5256 states have internal predecessors, (23373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 23373 transitions. [2022-01-18 15:48:53,188 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 23373 transitions. Word has length 30 [2022-01-18 15:48:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:53,189 INFO L470 AbstractCegarLoop]: Abstraction has 5257 states and 23373 transitions. [2022-01-18 15:48:53,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2022-01-18 15:48:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 23373 transitions. [2022-01-18 15:48:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:53,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:53,198 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:53,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:53,399 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,SelfDestructingSolverStorable227 [2022-01-18 15:48:53,399 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:53,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:53,400 INFO L85 PathProgramCache]: Analyzing trace with hash 210738098, now seen corresponding path program 34 times [2022-01-18 15:48:53,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:53,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352556484] [2022-01-18 15:48:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:53,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:53,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:53,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352556484] [2022-01-18 15:48:53,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352556484] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:53,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243034979] [2022-01-18 15:48:53,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:48:53,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:53,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:53,564 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) [2022-01-18 15:48:53,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 15:48:53,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:48:53,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:53,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:48:53,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:53,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 15:48:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:53,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:53,883 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:48:53,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-01-18 15:48:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:53,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243034979] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:53,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:53,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:48:53,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603141853] [2022-01-18 15:48:53,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:53,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:48:53,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:53,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:48:53,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:48:53,996 INFO L87 Difference]: Start difference. First operand 5257 states and 23373 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) [2022-01-18 15:48:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:56,114 INFO L93 Difference]: Finished difference Result 6679 states and 29130 transitions. [2022-01-18 15:48:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:48:56,115 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 30 [2022-01-18 15:48:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:56,133 INFO L225 Difference]: With dead ends: 6679 [2022-01-18 15:48:56,134 INFO L226 Difference]: Without dead ends: 6596 [2022-01-18 15:48:56,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=368, Invalid=2388, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:48:56,134 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 296 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:56,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 146 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 15:48:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6596 states. [2022-01-18 15:48:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6596 to 5253. [2022-01-18 15:48:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5253 states, 5252 states have (on average 4.446877380045697) internal successors, (23355), 5252 states have internal predecessors, (23355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5253 states to 5253 states and 23355 transitions. [2022-01-18 15:48:56,261 INFO L78 Accepts]: Start accepts. Automaton has 5253 states and 23355 transitions. Word has length 30 [2022-01-18 15:48:56,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:56,261 INFO L470 AbstractCegarLoop]: Abstraction has 5253 states and 23355 transitions. [2022-01-18 15:48:56,261 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) [2022-01-18 15:48:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 5253 states and 23355 transitions. [2022-01-18 15:48:56,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:48:56,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:56,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:56,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-01-18 15:48:56,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-01-18 15:48:56,488 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:48:56,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:56,488 INFO L85 PathProgramCache]: Analyzing trace with hash -365121106, now seen corresponding path program 35 times [2022-01-18 15:48:56,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:56,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047499692] [2022-01-18 15:48:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:56,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:56,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:56,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047499692] [2022-01-18 15:48:56,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047499692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:56,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522680929] [2022-01-18 15:48:56,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:48:56,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:56,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:56,654 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) [2022-01-18 15:48:56,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 15:48:56,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:48:56,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 15:48:56,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:56,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:56,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:56,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-01-18 15:48:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:57,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:57,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:57,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:57,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:57,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:57,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:48:57,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:57,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:57,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:57,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:57,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:48:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:57,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522680929] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:57,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:57,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-01-18 15:48:57,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045633683] [2022-01-18 15:48:57,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:57,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:48:57,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:57,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:48:57,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:48:57,387 INFO L87 Difference]: Start difference. First operand 5253 states and 23355 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:02,586 INFO L93 Difference]: Finished difference Result 8720 states and 36079 transitions. [2022-01-18 15:49:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 15:49:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:49:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:02,606 INFO L225 Difference]: With dead ends: 8720 [2022-01-18 15:49:02,606 INFO L226 Difference]: Without dead ends: 8575 [2022-01-18 15:49:02,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4208 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1496, Invalid=10494, Unknown=0, NotChecked=0, Total=11990 [2022-01-18 15:49:02,607 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 941 mSDsluCounter, 2126 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 4536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:02,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 343 Invalid, 4536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 15:49:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2022-01-18 15:49:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 5281. [2022-01-18 15:49:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 5280 states have (on average 4.442045454545455) internal successors, (23454), 5280 states have internal predecessors, (23454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 23454 transitions. [2022-01-18 15:49:02,718 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 23454 transitions. Word has length 30 [2022-01-18 15:49:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:02,718 INFO L470 AbstractCegarLoop]: Abstraction has 5281 states and 23454 transitions. [2022-01-18 15:49:02,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 23454 transitions. [2022-01-18 15:49:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:02,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:02,727 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:02,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:02,942 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,SelfDestructingSolverStorable229 [2022-01-18 15:49:02,942 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:02,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:02,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1115232346, now seen corresponding path program 36 times [2022-01-18 15:49:02,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:02,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870844750] [2022-01-18 15:49:02,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:02,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:03,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:03,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870844750] [2022-01-18 15:49:03,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870844750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:03,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906997533] [2022-01-18 15:49:03,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:49:03,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:03,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:03,096 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) [2022-01-18 15:49:03,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 15:49:03,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:49:03,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:03,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:49:03,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:03,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:03,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:03,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:03,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2022-01-18 15:49:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:03,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:03,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:03,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:03,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:03,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:03,763 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 44 treesize of output 9 [2022-01-18 15:49:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:03,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906997533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:03,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:03,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 33 [2022-01-18 15:49:03,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776994106] [2022-01-18 15:49:03,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:03,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:49:03,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:49:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:49:03,775 INFO L87 Difference]: Start difference. First operand 5281 states and 23454 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:07,798 INFO L93 Difference]: Finished difference Result 8694 states and 35945 transitions. [2022-01-18 15:49:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-18 15:49:07,799 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:49:07,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:07,819 INFO L225 Difference]: With dead ends: 8694 [2022-01-18 15:49:07,819 INFO L226 Difference]: Without dead ends: 8404 [2022-01-18 15:49:07,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3507 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1497, Invalid=10275, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 15:49:07,821 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 804 mSDsluCounter, 2786 mSDsCounter, 0 mSdLazyCounter, 4416 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 6387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 4416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1643 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:07,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 331 Invalid, 6387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 4416 Invalid, 0 Unknown, 1643 Unchecked, 1.6s Time] [2022-01-18 15:49:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8404 states. [2022-01-18 15:49:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8404 to 5380. [2022-01-18 15:49:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 4.435396913924521) internal successors, (23858), 5379 states have internal predecessors, (23858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 23858 transitions. [2022-01-18 15:49:07,934 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 23858 transitions. Word has length 30 [2022-01-18 15:49:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:07,935 INFO L470 AbstractCegarLoop]: Abstraction has 5380 states and 23858 transitions. [2022-01-18 15:49:07,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 23858 transitions. [2022-01-18 15:49:07,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:07,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:07,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:07,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:08,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:08,160 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:08,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:08,160 INFO L85 PathProgramCache]: Analyzing trace with hash -516629928, now seen corresponding path program 37 times [2022-01-18 15:49:08,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:08,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458676402] [2022-01-18 15:49:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:08,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:08,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:08,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458676402] [2022-01-18 15:49:08,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458676402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:08,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443609091] [2022-01-18 15:49:08,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:49:08,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:08,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:08,337 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) [2022-01-18 15:49:08,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 15:49:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:08,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:49:08,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:08,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:49:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:08,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:08,740 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:08,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-01-18 15:49:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:08,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443609091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:08,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:08,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:49:08,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718187816] [2022-01-18 15:49:08,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:08,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:49:08,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:08,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:49:08,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:49:08,820 INFO L87 Difference]: Start difference. First operand 5380 states and 23858 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) [2022-01-18 15:49:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:10,161 INFO L93 Difference]: Finished difference Result 6860 states and 29777 transitions. [2022-01-18 15:49:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:49:10,161 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 30 [2022-01-18 15:49:10,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:10,182 INFO L225 Difference]: With dead ends: 6860 [2022-01-18 15:49:10,182 INFO L226 Difference]: Without dead ends: 6787 [2022-01-18 15:49:10,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:49:10,183 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 316 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 2655 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:10,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 153 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2655 Invalid, 0 Unknown, 44 Unchecked, 0.8s Time] [2022-01-18 15:49:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2022-01-18 15:49:10,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 5380. [2022-01-18 15:49:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 4.435396913924521) internal successors, (23858), 5379 states have internal predecessors, (23858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 23858 transitions. [2022-01-18 15:49:10,301 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 23858 transitions. Word has length 30 [2022-01-18 15:49:10,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:10,301 INFO L470 AbstractCegarLoop]: Abstraction has 5380 states and 23858 transitions. [2022-01-18 15:49:10,301 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) [2022-01-18 15:49:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 23858 transitions. [2022-01-18 15:49:10,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:10,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:10,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:10,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:10,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:10,512 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:10,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1763510042, now seen corresponding path program 38 times [2022-01-18 15:49:10,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:10,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165469660] [2022-01-18 15:49:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:10,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:10,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:10,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165469660] [2022-01-18 15:49:10,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165469660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:10,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869297399] [2022-01-18 15:49:10,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:49:10,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:10,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:10,670 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) [2022-01-18 15:49:10,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 15:49:10,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:49:10,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:10,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:49:10,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:10,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:10,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2022-01-18 15:49:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:10,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:11,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:11,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:11,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:11,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-01-18 15:49:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:11,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869297399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:11,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:11,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-01-18 15:49:11,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328948187] [2022-01-18 15:49:11,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:11,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:49:11,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:11,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:49:11,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:49:11,326 INFO L87 Difference]: Start difference. First operand 5380 states and 23858 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:13,789 INFO L93 Difference]: Finished difference Result 7517 states and 32009 transitions. [2022-01-18 15:49:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 15:49:13,789 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:49:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:13,805 INFO L225 Difference]: With dead ends: 7517 [2022-01-18 15:49:13,805 INFO L226 Difference]: Without dead ends: 7332 [2022-01-18 15:49:13,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=735, Invalid=4235, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 15:49:13,815 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 427 mSDsluCounter, 2230 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 4887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2401 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:13,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 304 Invalid, 4887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2301 Invalid, 0 Unknown, 2401 Unchecked, 0.8s Time] [2022-01-18 15:49:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2022-01-18 15:49:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 5553. [2022-01-18 15:49:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5553 states, 5552 states have (on average 4.4185878962536025) internal successors, (24532), 5552 states have internal predecessors, (24532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 24532 transitions. [2022-01-18 15:49:13,923 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 24532 transitions. Word has length 30 [2022-01-18 15:49:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:13,923 INFO L470 AbstractCegarLoop]: Abstraction has 5553 states and 24532 transitions. [2022-01-18 15:49:13,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 24532 transitions. [2022-01-18 15:49:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:13,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:13,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:13,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:14,139 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,SelfDestructingSolverStorable232 [2022-01-18 15:49:14,139 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash -787093248, now seen corresponding path program 39 times [2022-01-18 15:49:14,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:14,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485989208] [2022-01-18 15:49:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:14,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:14,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:14,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485989208] [2022-01-18 15:49:14,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485989208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:14,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508706921] [2022-01-18 15:49:14,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:49:14,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:14,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:14,304 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) [2022-01-18 15:49:14,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 15:49:14,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:49:14,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:14,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:49:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:14,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 15:49:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:14,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:14,648 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:14,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 52 [2022-01-18 15:49:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:14,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508706921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:14,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:14,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:49:14,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861196966] [2022-01-18 15:49:14,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:14,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:49:14,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:49:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:49:14,703 INFO L87 Difference]: Start difference. First operand 5553 states and 24532 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) [2022-01-18 15:49:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:16,033 INFO L93 Difference]: Finished difference Result 7020 states and 30439 transitions. [2022-01-18 15:49:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:49:16,034 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 30 [2022-01-18 15:49:16,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:16,049 INFO L225 Difference]: With dead ends: 7020 [2022-01-18 15:49:16,050 INFO L226 Difference]: Without dead ends: 6947 [2022-01-18 15:49:16,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=293, Invalid=1777, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:49:16,050 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 302 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 2644 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:16,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 168 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2644 Invalid, 0 Unknown, 40 Unchecked, 0.9s Time] [2022-01-18 15:49:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6947 states. [2022-01-18 15:49:16,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6947 to 5560. [2022-01-18 15:49:16,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 4.417521136895125) internal successors, (24557), 5559 states have internal predecessors, (24557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 24557 transitions. [2022-01-18 15:49:16,144 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 24557 transitions. Word has length 30 [2022-01-18 15:49:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:16,144 INFO L470 AbstractCegarLoop]: Abstraction has 5560 states and 24557 transitions. [2022-01-18 15:49:16,144 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) [2022-01-18 15:49:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 24557 transitions. [2022-01-18 15:49:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:16,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:16,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:16,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:16,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:16,369 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:16,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1485925134, now seen corresponding path program 40 times [2022-01-18 15:49:16,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:16,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435671039] [2022-01-18 15:49:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:16,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:16,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:16,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435671039] [2022-01-18 15:49:16,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435671039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:16,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990623861] [2022-01-18 15:49:16,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:49:16,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:16,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:16,551 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) [2022-01-18 15:49:16,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 15:49:16,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:49:16,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:16,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:49:16,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:16,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:49:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:16,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:17,050 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:17,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-01-18 15:49:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:17,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990623861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:17,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:17,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:49:17,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952673717] [2022-01-18 15:49:17,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:17,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:49:17,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:49:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:49:17,137 INFO L87 Difference]: Start difference. First operand 5560 states and 24557 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) [2022-01-18 15:49:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:19,763 INFO L93 Difference]: Finished difference Result 7443 states and 32123 transitions. [2022-01-18 15:49:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:49:19,763 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 30 [2022-01-18 15:49:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:19,780 INFO L225 Difference]: With dead ends: 7443 [2022-01-18 15:49:19,780 INFO L226 Difference]: Without dead ends: 7261 [2022-01-18 15:49:19,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=338, Invalid=2418, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:49:19,781 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 376 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 4373 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 4593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 4373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:19,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 251 Invalid, 4593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 4373 Invalid, 0 Unknown, 23 Unchecked, 1.7s Time] [2022-01-18 15:49:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7261 states. [2022-01-18 15:49:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7261 to 5607. [2022-01-18 15:49:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5607 states, 5606 states have (on average 4.414199072422405) internal successors, (24746), 5606 states have internal predecessors, (24746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:19,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5607 states to 5607 states and 24746 transitions. [2022-01-18 15:49:19,883 INFO L78 Accepts]: Start accepts. Automaton has 5607 states and 24746 transitions. Word has length 30 [2022-01-18 15:49:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:19,883 INFO L470 AbstractCegarLoop]: Abstraction has 5607 states and 24746 transitions. [2022-01-18 15:49:19,883 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) [2022-01-18 15:49:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 5607 states and 24746 transitions. [2022-01-18 15:49:19,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:19,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:19,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:19,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-01-18 15:49:20,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-01-18 15:49:20,106 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:20,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2137609593, now seen corresponding path program 32 times [2022-01-18 15:49:20,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:20,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329360035] [2022-01-18 15:49:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:20,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:20,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:20,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329360035] [2022-01-18 15:49:20,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329360035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:20,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459167556] [2022-01-18 15:49:20,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:49:20,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:20,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:20,281 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) [2022-01-18 15:49:20,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 15:49:20,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:49:20,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:20,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:49:20,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:20,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:20,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:20,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-01-18 15:49:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:20,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:21,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:21,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:21,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:21,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:21,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:49:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:21,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459167556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:21,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:21,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 15:49:21,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579507826] [2022-01-18 15:49:21,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:21,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:49:21,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:21,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:49:21,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:49:21,210 INFO L87 Difference]: Start difference. First operand 5607 states and 24746 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:25,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:25,157 INFO L93 Difference]: Finished difference Result 9310 states and 38490 transitions. [2022-01-18 15:49:25,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 15:49:25,157 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:49:25,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:25,178 INFO L225 Difference]: With dead ends: 9310 [2022-01-18 15:49:25,178 INFO L226 Difference]: Without dead ends: 8964 [2022-01-18 15:49:25,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=898, Invalid=6934, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 15:49:25,179 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 863 mSDsluCounter, 2525 mSDsCounter, 0 mSdLazyCounter, 3998 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 5296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 3998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1024 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:25,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 353 Invalid, 5296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 3998 Invalid, 0 Unknown, 1024 Unchecked, 1.7s Time] [2022-01-18 15:49:25,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8964 states. [2022-01-18 15:49:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8964 to 5580. [2022-01-18 15:49:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5580 states, 5579 states have (on average 4.415307402760352) internal successors, (24633), 5579 states have internal predecessors, (24633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5580 states to 5580 states and 24633 transitions. [2022-01-18 15:49:25,289 INFO L78 Accepts]: Start accepts. Automaton has 5580 states and 24633 transitions. Word has length 30 [2022-01-18 15:49:25,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:25,290 INFO L470 AbstractCegarLoop]: Abstraction has 5580 states and 24633 transitions. [2022-01-18 15:49:25,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 5580 states and 24633 transitions. [2022-01-18 15:49:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:25,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:25,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:25,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-01-18 15:49:25,513 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,SelfDestructingSolverStorable235 [2022-01-18 15:49:25,514 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:25,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:25,514 INFO L85 PathProgramCache]: Analyzing trace with hash 790956176, now seen corresponding path program 41 times [2022-01-18 15:49:25,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:25,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548917133] [2022-01-18 15:49:25,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:25,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:25,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:25,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548917133] [2022-01-18 15:49:25,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548917133] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:25,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530813688] [2022-01-18 15:49:25,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:49:25,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:25,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:25,628 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) [2022-01-18 15:49:25,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 15:49:25,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:49:25,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 15:49:25,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:25,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:25,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:25,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:25,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2022-01-18 15:49:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:25,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:26,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:26,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:26,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:26,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:26,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:49:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:49:26,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530813688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:26,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:26,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 30 [2022-01-18 15:49:26,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600356732] [2022-01-18 15:49:26,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:26,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:49:26,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:26,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:49:26,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:49:26,319 INFO L87 Difference]: Start difference. First operand 5580 states and 24633 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) [2022-01-18 15:49:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:27,674 INFO L93 Difference]: Finished difference Result 7050 states and 30412 transitions. [2022-01-18 15:49:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:49:27,675 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 30 [2022-01-18 15:49:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:27,692 INFO L225 Difference]: With dead ends: 7050 [2022-01-18 15:49:27,692 INFO L226 Difference]: Without dead ends: 7005 [2022-01-18 15:49:27,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=371, Invalid=2281, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:49:27,693 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 358 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 3881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2212 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:27,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 294 Invalid, 3881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1539 Invalid, 0 Unknown, 2212 Unchecked, 0.6s Time] [2022-01-18 15:49:27,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2022-01-18 15:49:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 5704. [2022-01-18 15:49:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 4.406452744169735) internal successors, (25130), 5703 states have internal predecessors, (25130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 25130 transitions. [2022-01-18 15:49:27,812 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 25130 transitions. Word has length 30 [2022-01-18 15:49:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:27,812 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 25130 transitions. [2022-01-18 15:49:27,812 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) [2022-01-18 15:49:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 25130 transitions. [2022-01-18 15:49:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:27,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:27,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:27,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:28,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:28,038 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1709756985, now seen corresponding path program 5 times [2022-01-18 15:49:28,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:28,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438649936] [2022-01-18 15:49:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:28,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:28,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:28,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438649936] [2022-01-18 15:49:28,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438649936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:28,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442606453] [2022-01-18 15:49:28,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:49:28,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:28,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:28,147 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) [2022-01-18 15:49:28,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 15:49:28,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:49:28,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:28,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 15:49:28,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:28,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:28,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:28,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:28,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2022-01-18 15:49:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:28,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:29,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:29,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:29,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:29,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:29,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:49:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:49:29,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442606453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:29,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:29,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 30 [2022-01-18 15:49:29,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149409560] [2022-01-18 15:49:29,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:29,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:49:29,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:29,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:49:29,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:49:29,052 INFO L87 Difference]: Start difference. First operand 5704 states and 25130 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) [2022-01-18 15:49:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:31,273 INFO L93 Difference]: Finished difference Result 7553 states and 32300 transitions. [2022-01-18 15:49:31,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 15:49:31,273 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 30 [2022-01-18 15:49:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:31,291 INFO L225 Difference]: With dead ends: 7553 [2022-01-18 15:49:31,291 INFO L226 Difference]: Without dead ends: 7372 [2022-01-18 15:49:31,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=466, Invalid=2956, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 15:49:31,291 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 405 mSDsluCounter, 1850 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 3684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1456 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:31,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 332 Invalid, 3684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2062 Invalid, 0 Unknown, 1456 Unchecked, 0.9s Time] [2022-01-18 15:49:31,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7372 states. [2022-01-18 15:49:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7372 to 5747. [2022-01-18 15:49:31,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5747 states, 5746 states have (on average 4.403585102680125) internal successors, (25303), 5746 states have internal predecessors, (25303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5747 states to 5747 states and 25303 transitions. [2022-01-18 15:49:31,394 INFO L78 Accepts]: Start accepts. Automaton has 5747 states and 25303 transitions. Word has length 30 [2022-01-18 15:49:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:31,394 INFO L470 AbstractCegarLoop]: Abstraction has 5747 states and 25303 transitions. [2022-01-18 15:49:31,395 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) [2022-01-18 15:49:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand 5747 states and 25303 transitions. [2022-01-18 15:49:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:31,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:31,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:31,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:31,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:31,619 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:31,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:31,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1759647114, now seen corresponding path program 42 times [2022-01-18 15:49:31,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:31,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553436254] [2022-01-18 15:49:31,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:31,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:31,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:31,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553436254] [2022-01-18 15:49:31,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553436254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:31,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075288143] [2022-01-18 15:49:31,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:49:31,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:31,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:31,844 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) [2022-01-18 15:49:31,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 15:49:31,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:49:31,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:31,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:49:31,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:32,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:32,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 52 [2022-01-18 15:49:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:32,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:32,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:32,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:32,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:32,657 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 9 [2022-01-18 15:49:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:32,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075288143] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:32,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:32,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-01-18 15:49:32,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365138899] [2022-01-18 15:49:32,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:32,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:49:32,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:49:32,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:49:32,676 INFO L87 Difference]: Start difference. First operand 5747 states and 25303 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:37,477 INFO L93 Difference]: Finished difference Result 9964 states and 40834 transitions. [2022-01-18 15:49:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 15:49:37,477 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:49:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:37,499 INFO L225 Difference]: With dead ends: 9964 [2022-01-18 15:49:37,499 INFO L226 Difference]: Without dead ends: 9685 [2022-01-18 15:49:37,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1000, Invalid=7742, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 15:49:37,500 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1082 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 4827 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 5154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 4827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:37,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1082 Valid, 379 Invalid, 5154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 4827 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 15:49:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2022-01-18 15:49:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 5828. [2022-01-18 15:49:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5828 states, 5827 states have (on average 4.408615067787884) internal successors, (25689), 5827 states have internal predecessors, (25689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5828 states to 5828 states and 25689 transitions. [2022-01-18 15:49:37,615 INFO L78 Accepts]: Start accepts. Automaton has 5828 states and 25689 transitions. Word has length 30 [2022-01-18 15:49:37,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:37,615 INFO L470 AbstractCegarLoop]: Abstraction has 5828 states and 25689 transitions. [2022-01-18 15:49:37,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 5828 states and 25689 transitions. [2022-01-18 15:49:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:37,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:37,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:37,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:37,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:37,836 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:37,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2080603933, now seen corresponding path program 72 times [2022-01-18 15:49:37,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:37,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056567729] [2022-01-18 15:49:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:37,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:38,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:38,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056567729] [2022-01-18 15:49:38,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056567729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:38,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258513457] [2022-01-18 15:49:38,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:49:38,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:38,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:38,048 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) [2022-01-18 15:49:38,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 15:49:38,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:49:38,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:38,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:49:38,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:38,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:38,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:38,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:38,314 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 15:49:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:38,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:38,519 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:38,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:49:38,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:38,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:38,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:38,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:38,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:49:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:38,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258513457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:38,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:38,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-01-18 15:49:38,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641620803] [2022-01-18 15:49:38,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:38,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:49:38,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:38,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:49:38,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:49:38,573 INFO L87 Difference]: Start difference. First operand 5828 states and 25689 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2022-01-18 15:49:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:39,783 INFO L93 Difference]: Finished difference Result 6452 states and 28174 transitions. [2022-01-18 15:49:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:49:39,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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 30 [2022-01-18 15:49:39,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:39,798 INFO L225 Difference]: With dead ends: 6452 [2022-01-18 15:49:39,798 INFO L226 Difference]: Without dead ends: 6387 [2022-01-18 15:49:39,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:49:39,798 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 195 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:39,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 124 Invalid, 2239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1790 Invalid, 0 Unknown, 356 Unchecked, 0.6s Time] [2022-01-18 15:49:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2022-01-18 15:49:39,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 5828. [2022-01-18 15:49:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5828 states, 5827 states have (on average 4.408615067787884) internal successors, (25689), 5827 states have internal predecessors, (25689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5828 states to 5828 states and 25689 transitions. [2022-01-18 15:49:39,894 INFO L78 Accepts]: Start accepts. Automaton has 5828 states and 25689 transitions. Word has length 30 [2022-01-18 15:49:39,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:39,894 INFO L470 AbstractCegarLoop]: Abstraction has 5828 states and 25689 transitions. [2022-01-18 15:49:39,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2022-01-18 15:49:39,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5828 states and 25689 transitions. [2022-01-18 15:49:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:39,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:39,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:39,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-01-18 15:49:40,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-01-18 15:49:40,119 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:40,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:40,119 INFO L85 PathProgramCache]: Analyzing trace with hash -112273467, now seen corresponding path program 73 times [2022-01-18 15:49:40,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:40,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324247057] [2022-01-18 15:49:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:40,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:40,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:40,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324247057] [2022-01-18 15:49:40,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324247057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:40,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830688680] [2022-01-18 15:49:40,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:49:40,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:40,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:40,338 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) [2022-01-18 15:49:40,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 15:49:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:40,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:49:40,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:40,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:40,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:40,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:40,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 15:49:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:40,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:40,907 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:40,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:49:40,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:40,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:40,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:40,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:40,955 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 25 treesize of output 3 [2022-01-18 15:49:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:40,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830688680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:40,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:40,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:49:40,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146747606] [2022-01-18 15:49:40,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:40,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:49:40,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:40,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:49:40,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:49:40,981 INFO L87 Difference]: Start difference. First operand 5828 states and 25689 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-01-18 15:49:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:42,581 INFO L93 Difference]: Finished difference Result 6630 states and 28884 transitions. [2022-01-18 15:49:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:49:42,581 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 30 [2022-01-18 15:49:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:42,596 INFO L225 Difference]: With dead ends: 6630 [2022-01-18 15:49:42,596 INFO L226 Difference]: Without dead ends: 6546 [2022-01-18 15:49:42,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:49:42,597 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 239 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:42,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 164 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2073 Invalid, 0 Unknown, 375 Unchecked, 0.9s Time] [2022-01-18 15:49:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6546 states. [2022-01-18 15:49:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6546 to 5818. [2022-01-18 15:49:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 5817 states have (on average 4.414302905277634) internal successors, (25678), 5817 states have internal predecessors, (25678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 25678 transitions. [2022-01-18 15:49:42,691 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 25678 transitions. Word has length 30 [2022-01-18 15:49:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:42,692 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 25678 transitions. [2022-01-18 15:49:42,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-01-18 15:49:42,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 25678 transitions. [2022-01-18 15:49:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:42,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:42,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:42,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:42,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:42,909 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:42,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1006856669, now seen corresponding path program 74 times [2022-01-18 15:49:42,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:42,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611281732] [2022-01-18 15:49:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:42,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:43,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611281732] [2022-01-18 15:49:43,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611281732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337174607] [2022-01-18 15:49:43,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:49:43,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:43,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:43,069 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) [2022-01-18 15:49:43,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 15:49:43,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:49:43,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:43,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:49:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:43,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:43,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:43,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:43,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:49:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:43,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:43,467 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:43,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:49:43,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:43,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:43,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:43,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:43,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:49:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:43,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337174607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:43,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:43,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:49:43,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127735195] [2022-01-18 15:49:43,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:43,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:49:43,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:43,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:49:43,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:49:43,529 INFO L87 Difference]: Start difference. First operand 5818 states and 25678 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) [2022-01-18 15:49:44,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:44,869 INFO L93 Difference]: Finished difference Result 7126 states and 30803 transitions. [2022-01-18 15:49:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:49:44,869 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 30 [2022-01-18 15:49:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:44,885 INFO L225 Difference]: With dead ends: 7126 [2022-01-18 15:49:44,886 INFO L226 Difference]: Without dead ends: 7047 [2022-01-18 15:49:44,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:49:44,886 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 311 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:44,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 195 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2411 Invalid, 0 Unknown, 554 Unchecked, 0.8s Time] [2022-01-18 15:49:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2022-01-18 15:49:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 5849. [2022-01-18 15:49:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 5848 states have (on average 4.412619699042407) internal successors, (25805), 5848 states have internal predecessors, (25805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 25805 transitions. [2022-01-18 15:49:44,986 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 25805 transitions. Word has length 30 [2022-01-18 15:49:44,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:44,986 INFO L470 AbstractCegarLoop]: Abstraction has 5849 states and 25805 transitions. [2022-01-18 15:49:44,986 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) [2022-01-18 15:49:44,986 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 25805 transitions. [2022-01-18 15:49:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:44,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:44,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:45,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:45,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:45,204 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash 154321331, now seen corresponding path program 75 times [2022-01-18 15:49:45,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:45,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757269291] [2022-01-18 15:49:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:45,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:45,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:45,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757269291] [2022-01-18 15:49:45,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757269291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:45,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322344042] [2022-01-18 15:49:45,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:49:45,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:45,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:45,465 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) [2022-01-18 15:49:45,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 15:49:45,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:49:45,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:45,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:49:45,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:45,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:45,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:45,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:45,727 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 38 [2022-01-18 15:49:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:46,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:46,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:46,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:46,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:46,528 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 47 treesize of output 64 [2022-01-18 15:49:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:46,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322344042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:46,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:46,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-01-18 15:49:46,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486586018] [2022-01-18 15:49:46,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:46,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:49:46,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:46,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:49:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:49:46,656 INFO L87 Difference]: Start difference. First operand 5849 states and 25805 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:50,856 INFO L93 Difference]: Finished difference Result 8384 states and 35643 transitions. [2022-01-18 15:49:50,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 15:49:50,856 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:49:50,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:50,875 INFO L225 Difference]: With dead ends: 8384 [2022-01-18 15:49:50,876 INFO L226 Difference]: Without dead ends: 8190 [2022-01-18 15:49:50,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=909, Invalid=6747, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 15:49:50,877 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 537 mSDsluCounter, 1962 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 4763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2241 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:50,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 220 Invalid, 4763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2356 Invalid, 0 Unknown, 2241 Unchecked, 1.2s Time] [2022-01-18 15:49:50,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8190 states. [2022-01-18 15:49:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8190 to 5902. [2022-01-18 15:49:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5902 states, 5901 states have (on average 4.412472462294526) internal successors, (26038), 5901 states have internal predecessors, (26038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 26038 transitions. [2022-01-18 15:49:51,016 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 26038 transitions. Word has length 30 [2022-01-18 15:49:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:51,016 INFO L470 AbstractCegarLoop]: Abstraction has 5902 states and 26038 transitions. [2022-01-18 15:49:51,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 26038 transitions. [2022-01-18 15:49:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:51,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:51,026 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:51,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-01-18 15:49:51,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:51,239 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1084827333, now seen corresponding path program 76 times [2022-01-18 15:49:51,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:51,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365660792] [2022-01-18 15:49:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:51,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:51,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:51,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365660792] [2022-01-18 15:49:51,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365660792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:51,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31491677] [2022-01-18 15:49:51,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:49:51,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:51,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:51,486 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) [2022-01-18 15:49:51,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 15:49:51,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:49:51,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:51,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:49:51,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:51,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:51,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:51,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:51,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:49:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:51,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:51,925 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:51,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:49:51,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:51,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:51,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:51,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:49:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:51,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31491677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:51,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:51,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:49:51,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491514961] [2022-01-18 15:49:51,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:51,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:49:51,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:49:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:49:51,987 INFO L87 Difference]: Start difference. First operand 5902 states and 26038 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-01-18 15:49:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:53,302 INFO L93 Difference]: Finished difference Result 6921 states and 30195 transitions. [2022-01-18 15:49:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:49:53,302 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 30 [2022-01-18 15:49:53,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:53,324 INFO L225 Difference]: With dead ends: 6921 [2022-01-18 15:49:53,324 INFO L226 Difference]: Without dead ends: 6840 [2022-01-18 15:49:53,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:49:53,325 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 228 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:53,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 149 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2130 Invalid, 0 Unknown, 381 Unchecked, 0.7s Time] [2022-01-18 15:49:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6840 states. [2022-01-18 15:49:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6840 to 5949. [2022-01-18 15:49:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5949 states, 5948 states have (on average 4.418123739071957) internal successors, (26279), 5948 states have internal predecessors, (26279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 26279 transitions. [2022-01-18 15:49:53,450 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 26279 transitions. Word has length 30 [2022-01-18 15:49:53,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:53,450 INFO L470 AbstractCegarLoop]: Abstraction has 5949 states and 26279 transitions. [2022-01-18 15:49:53,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-01-18 15:49:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 26279 transitions. [2022-01-18 15:49:53,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:53,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:53,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:53,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:53,677 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,SelfDestructingSolverStorable243 [2022-01-18 15:49:53,677 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:53,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1979410535, now seen corresponding path program 77 times [2022-01-18 15:49:53,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:53,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524721134] [2022-01-18 15:49:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:53,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:53,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524721134] [2022-01-18 15:49:53,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524721134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670863850] [2022-01-18 15:49:53,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:49:53,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:53,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:53,860 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) [2022-01-18 15:49:53,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 15:49:53,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:49:53,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:49:53,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:54,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:54,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:54,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:54,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:49:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:54,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:54,272 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:49:54,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:49:54,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:54,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:54,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:54,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:54,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:49:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:54,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670863850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:54,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:54,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:49:54,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533767341] [2022-01-18 15:49:54,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:54,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:49:54,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:49:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:49:54,332 INFO L87 Difference]: Start difference. First operand 5949 states and 26279 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) [2022-01-18 15:49:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:56,555 INFO L93 Difference]: Finished difference Result 7623 states and 32637 transitions. [2022-01-18 15:49:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:49:56,555 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 30 [2022-01-18 15:49:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:56,574 INFO L225 Difference]: With dead ends: 7623 [2022-01-18 15:49:56,574 INFO L226 Difference]: Without dead ends: 7471 [2022-01-18 15:49:56,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=375, Invalid=2381, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:49:56,574 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 364 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 2862 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 3572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:56,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 303 Invalid, 3572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2862 Invalid, 0 Unknown, 575 Unchecked, 1.2s Time] [2022-01-18 15:49:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7471 states. [2022-01-18 15:49:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7471 to 6014. [2022-01-18 15:49:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 4.423914851155829) internal successors, (26601), 6013 states have internal predecessors, (26601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 26601 transitions. [2022-01-18 15:49:56,682 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 26601 transitions. Word has length 30 [2022-01-18 15:49:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:56,682 INFO L470 AbstractCegarLoop]: Abstraction has 6014 states and 26601 transitions. [2022-01-18 15:49:56,682 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) [2022-01-18 15:49:56,682 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 26601 transitions. [2022-01-18 15:49:56,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:49:56,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:56,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:56,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-01-18 15:49:56,907 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,SelfDestructingSolverStorable244 [2022-01-18 15:49:56,907 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:49:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:56,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1262542035, now seen corresponding path program 78 times [2022-01-18 15:49:56,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:56,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031228886] [2022-01-18 15:49:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:56,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:57,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031228886] [2022-01-18 15:49:57,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031228886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189002786] [2022-01-18 15:49:57,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:49:57,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:57,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:57,121 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) [2022-01-18 15:49:57,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 15:49:57,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:49:57,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:57,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:49:57,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:57,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:57,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:57,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:57,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:49:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:57,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:58,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:58,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:58,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:58,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 65 [2022-01-18 15:49:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:58,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189002786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:58,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:58,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-18 15:49:58,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100215133] [2022-01-18 15:49:58,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:58,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:49:58,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:58,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:49:58,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:49:58,129 INFO L87 Difference]: Start difference. First operand 6014 states and 26601 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:00,271 INFO L93 Difference]: Finished difference Result 8209 states and 35486 transitions. [2022-01-18 15:50:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:50:00,272 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:50:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:00,290 INFO L225 Difference]: With dead ends: 8209 [2022-01-18 15:50:00,291 INFO L226 Difference]: Without dead ends: 8052 [2022-01-18 15:50:00,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=592, Invalid=4100, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 15:50:00,291 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 331 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 3639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1714 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:00,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 246 Invalid, 3639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1848 Invalid, 0 Unknown, 1714 Unchecked, 0.7s Time] [2022-01-18 15:50:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8052 states. [2022-01-18 15:50:00,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8052 to 6104. [2022-01-18 15:50:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6104 states, 6103 states have (on average 4.431918728494183) internal successors, (27048), 6103 states have internal predecessors, (27048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6104 states to 6104 states and 27048 transitions. [2022-01-18 15:50:00,404 INFO L78 Accepts]: Start accepts. Automaton has 6104 states and 27048 transitions. Word has length 30 [2022-01-18 15:50:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:00,404 INFO L470 AbstractCegarLoop]: Abstraction has 6104 states and 27048 transitions. [2022-01-18 15:50:00,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 6104 states and 27048 transitions. [2022-01-18 15:50:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:00,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:00,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:00,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:00,628 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,SelfDestructingSolverStorable245 [2022-01-18 15:50:00,628 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash -861929485, now seen corresponding path program 79 times [2022-01-18 15:50:00,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:00,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796149352] [2022-01-18 15:50:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:00,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:00,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:00,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796149352] [2022-01-18 15:50:00,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796149352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:00,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431668694] [2022-01-18 15:50:00,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:50:00,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:00,789 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) [2022-01-18 15:50:00,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 15:50:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:00,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:00,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:01,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:01,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:01,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:01,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:50:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:01,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:01,328 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:01,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:50:01,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:01,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:01,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:50:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:01,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431668694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:01,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:01,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:50:01,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263242652] [2022-01-18 15:50:01,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:01,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:50:01,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:01,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:50:01,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:50:01,400 INFO L87 Difference]: Start difference. First operand 6104 states and 27048 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) [2022-01-18 15:50:02,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:02,215 INFO L93 Difference]: Finished difference Result 6898 states and 30266 transitions. [2022-01-18 15:50:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:50:02,215 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 30 [2022-01-18 15:50:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:02,232 INFO L225 Difference]: With dead ends: 6898 [2022-01-18 15:50:02,232 INFO L226 Difference]: Without dead ends: 6891 [2022-01-18 15:50:02,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:50:02,232 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 181 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:02,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 184 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1371 Invalid, 0 Unknown, 412 Unchecked, 0.6s Time] [2022-01-18 15:50:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2022-01-18 15:50:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6224. [2022-01-18 15:50:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 4.441266270287643) internal successors, (27638), 6223 states have internal predecessors, (27638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 27638 transitions. [2022-01-18 15:50:02,338 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 27638 transitions. Word has length 30 [2022-01-18 15:50:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:02,338 INFO L470 AbstractCegarLoop]: Abstraction has 6224 states and 27638 transitions. [2022-01-18 15:50:02,338 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) [2022-01-18 15:50:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 27638 transitions. [2022-01-18 15:50:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:02,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:02,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:02,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:02,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-01-18 15:50:02,564 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:02,564 INFO L85 PathProgramCache]: Analyzing trace with hash -833300334, now seen corresponding path program 3 times [2022-01-18 15:50:02,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:02,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417032042] [2022-01-18 15:50:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:02,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:02,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417032042] [2022-01-18 15:50:02,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417032042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491027151] [2022-01-18 15:50:02,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:50:02,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:02,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:02,758 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) [2022-01-18 15:50:02,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 15:50:02,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:50:02,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:03,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:03,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:03,071 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:50:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:03,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:03,370 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:03,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:50:03,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:03,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:03,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:50:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:03,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491027151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:03,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:03,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:50:03,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091314641] [2022-01-18 15:50:03,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:03,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:50:03,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:03,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:50:03,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:50:03,486 INFO L87 Difference]: Start difference. First operand 6224 states and 27638 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) [2022-01-18 15:50:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:04,457 INFO L93 Difference]: Finished difference Result 7140 states and 31245 transitions. [2022-01-18 15:50:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:50:04,457 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 30 [2022-01-18 15:50:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:04,474 INFO L225 Difference]: With dead ends: 7140 [2022-01-18 15:50:04,474 INFO L226 Difference]: Without dead ends: 7045 [2022-01-18 15:50:04,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:50:04,474 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 189 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 580 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:04,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 202 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1797 Invalid, 0 Unknown, 580 Unchecked, 0.7s Time] [2022-01-18 15:50:04,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7045 states. [2022-01-18 15:50:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7045 to 6211. [2022-01-18 15:50:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6211 states, 6210 states have (on average 4.440740740740741) internal successors, (27577), 6210 states have internal predecessors, (27577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6211 states to 6211 states and 27577 transitions. [2022-01-18 15:50:04,583 INFO L78 Accepts]: Start accepts. Automaton has 6211 states and 27577 transitions. Word has length 30 [2022-01-18 15:50:04,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:04,584 INFO L470 AbstractCegarLoop]: Abstraction has 6211 states and 27577 transitions. [2022-01-18 15:50:04,584 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) [2022-01-18 15:50:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 6211 states and 27577 transitions. [2022-01-18 15:50:04,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:04,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:04,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:04,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:04,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:04,810 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:04,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:04,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1658012505, now seen corresponding path program 80 times [2022-01-18 15:50:04,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:04,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069936283] [2022-01-18 15:50:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:04,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:05,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:05,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069936283] [2022-01-18 15:50:05,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069936283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:05,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422341049] [2022-01-18 15:50:05,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:05,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:05,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:05,015 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) [2022-01-18 15:50:05,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 15:50:05,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:05,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:05,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:05,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:05,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:05,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:05,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:05,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:50:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:05,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:05,590 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:05,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:50:05,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:05,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:05,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:05,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:05,647 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 25 treesize of output 3 [2022-01-18 15:50:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:05,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422341049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:05,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:05,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:50:05,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121967015] [2022-01-18 15:50:05,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:05,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:50:05,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:05,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:50:05,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:50:05,672 INFO L87 Difference]: Start difference. First operand 6211 states and 27577 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) [2022-01-18 15:50:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:07,714 INFO L93 Difference]: Finished difference Result 7871 states and 33788 transitions. [2022-01-18 15:50:07,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:50:07,714 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 30 [2022-01-18 15:50:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:07,732 INFO L225 Difference]: With dead ends: 7871 [2022-01-18 15:50:07,732 INFO L226 Difference]: Without dead ends: 7728 [2022-01-18 15:50:07,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=343, Invalid=2413, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:50:07,733 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 510 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 2652 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 3212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:07,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 311 Invalid, 3212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2652 Invalid, 0 Unknown, 423 Unchecked, 1.1s Time] [2022-01-18 15:50:07,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7728 states. [2022-01-18 15:50:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7728 to 6252. [2022-01-18 15:50:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6252 states, 6251 states have (on average 4.443449048152296) internal successors, (27776), 6251 states have internal predecessors, (27776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6252 states to 6252 states and 27776 transitions. [2022-01-18 15:50:07,883 INFO L78 Accepts]: Start accepts. Automaton has 6252 states and 27776 transitions. Word has length 30 [2022-01-18 15:50:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:07,883 INFO L470 AbstractCegarLoop]: Abstraction has 6252 states and 27776 transitions. [2022-01-18 15:50:07,883 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) [2022-01-18 15:50:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 6252 states and 27776 transitions. [2022-01-18 15:50:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:07,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:07,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:07,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:08,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:08,110 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:08,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:08,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1654050101, now seen corresponding path program 81 times [2022-01-18 15:50:08,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:08,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661446756] [2022-01-18 15:50:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:08,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:08,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:08,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661446756] [2022-01-18 15:50:08,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661446756] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:08,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516163259] [2022-01-18 15:50:08,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:50:08,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:08,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:08,302 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) [2022-01-18 15:50:08,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-18 15:50:08,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:50:08,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:08,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:50:08,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:08,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:08,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:08,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:08,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 46 [2022-01-18 15:50:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:08,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:09,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:09,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:09,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:09,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:09,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 9 [2022-01-18 15:50:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:09,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516163259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:09,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:09,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 33 [2022-01-18 15:50:09,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200054959] [2022-01-18 15:50:09,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:09,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:50:09,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:09,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:50:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:50:09,788 INFO L87 Difference]: Start difference. First operand 6252 states and 27776 transitions. Second operand has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:10,965 INFO L93 Difference]: Finished difference Result 7609 states and 33222 transitions. [2022-01-18 15:50:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:50:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:50:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:10,983 INFO L225 Difference]: With dead ends: 7609 [2022-01-18 15:50:10,984 INFO L226 Difference]: Without dead ends: 7511 [2022-01-18 15:50:10,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=3011, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 15:50:10,984 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 330 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 3221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1936 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:10,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 286 Invalid, 3221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1196 Invalid, 0 Unknown, 1936 Unchecked, 0.4s Time] [2022-01-18 15:50:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7511 states. [2022-01-18 15:50:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7511 to 6280. [2022-01-18 15:50:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6280 states, 6279 states have (on average 4.443541965281096) internal successors, (27901), 6279 states have internal predecessors, (27901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6280 states to 6280 states and 27901 transitions. [2022-01-18 15:50:11,096 INFO L78 Accepts]: Start accepts. Automaton has 6280 states and 27901 transitions. Word has length 30 [2022-01-18 15:50:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:11,096 INFO L470 AbstractCegarLoop]: Abstraction has 6280 states and 27901 transitions. [2022-01-18 15:50:11,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6280 states and 27901 transitions. [2022-01-18 15:50:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:11,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:11,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:11,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-01-18 15:50:11,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-01-18 15:50:11,312 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1512213559, now seen corresponding path program 82 times [2022-01-18 15:50:11,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:11,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397702980] [2022-01-18 15:50:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:11,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:11,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397702980] [2022-01-18 15:50:11,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397702980] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826616171] [2022-01-18 15:50:11,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:50:11,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:11,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:11,482 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) [2022-01-18 15:50:11,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-18 15:50:11,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:50:11,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:11,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:11,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:11,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:11,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:11,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:11,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:50:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:11,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:12,103 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:12,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:50:12,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:12,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:12,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:12,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:12,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:50:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:12,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826616171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:12,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:12,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:50:12,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541902159] [2022-01-18 15:50:12,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:12,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:50:12,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:50:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:50:12,216 INFO L87 Difference]: Start difference. First operand 6280 states and 27901 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-01-18 15:50:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:13,132 INFO L93 Difference]: Finished difference Result 7234 states and 31625 transitions. [2022-01-18 15:50:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:50:13,133 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 30 [2022-01-18 15:50:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:13,151 INFO L225 Difference]: With dead ends: 7234 [2022-01-18 15:50:13,151 INFO L226 Difference]: Without dead ends: 7147 [2022-01-18 15:50:13,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:50:13,151 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 230 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 643 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:13,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 207 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2306 Invalid, 0 Unknown, 643 Unchecked, 0.7s Time] [2022-01-18 15:50:13,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7147 states. [2022-01-18 15:50:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7147 to 6270. [2022-01-18 15:50:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6270 states, 6269 states have (on average 4.446801722762801) internal successors, (27877), 6269 states have internal predecessors, (27877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6270 states to 6270 states and 27877 transitions. [2022-01-18 15:50:13,272 INFO L78 Accepts]: Start accepts. Automaton has 6270 states and 27877 transitions. Word has length 30 [2022-01-18 15:50:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:13,273 INFO L470 AbstractCegarLoop]: Abstraction has 6270 states and 27877 transitions. [2022-01-18 15:50:13,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-01-18 15:50:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6270 states and 27877 transitions. [2022-01-18 15:50:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:13,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:13,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:13,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:13,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:13,485 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1661676599, now seen corresponding path program 7 times [2022-01-18 15:50:13,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:13,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11601210] [2022-01-18 15:50:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:13,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:13,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:13,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11601210] [2022-01-18 15:50:13,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11601210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:13,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423929249] [2022-01-18 15:50:13,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:50:13,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:13,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:13,696 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) [2022-01-18 15:50:13,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-18 15:50:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:13,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:13,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:14,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:14,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:14,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:14,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:50:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:14,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:14,404 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:14,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:50:14,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:14,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:14,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:14,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:14,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:50:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:14,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423929249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:14,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:14,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:50:14,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636704346] [2022-01-18 15:50:14,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:14,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:50:14,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:14,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:50:14,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:50:14,491 INFO L87 Difference]: Start difference. First operand 6270 states and 27877 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:15,377 INFO L93 Difference]: Finished difference Result 6901 states and 30328 transitions. [2022-01-18 15:50:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:50:15,377 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:50:15,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:15,393 INFO L225 Difference]: With dead ends: 6901 [2022-01-18 15:50:15,393 INFO L226 Difference]: Without dead ends: 6862 [2022-01-18 15:50:15,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:50:15,393 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 200 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:15,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 139 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1239 Invalid, 0 Unknown, 547 Unchecked, 0.5s Time] [2022-01-18 15:50:15,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6862 states. [2022-01-18 15:50:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6862 to 6272. [2022-01-18 15:50:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6272 states, 6271 states have (on average 4.446499760803699) internal successors, (27884), 6271 states have internal predecessors, (27884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6272 states to 6272 states and 27884 transitions. [2022-01-18 15:50:15,554 INFO L78 Accepts]: Start accepts. Automaton has 6272 states and 27884 transitions. Word has length 30 [2022-01-18 15:50:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:15,554 INFO L470 AbstractCegarLoop]: Abstraction has 6272 states and 27884 transitions. [2022-01-18 15:50:15,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6272 states and 27884 transitions. [2022-01-18 15:50:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:15,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:15,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:15,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:15,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:15,782 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:15,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1053761045, now seen corresponding path program 6 times [2022-01-18 15:50:15,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:15,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302555689] [2022-01-18 15:50:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:15,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:16,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:16,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302555689] [2022-01-18 15:50:16,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302555689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:16,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433832202] [2022-01-18 15:50:16,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:50:16,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:16,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:16,013 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) [2022-01-18 15:50:16,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-18 15:50:16,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:50:16,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:16,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:50:16,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:16,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:16,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:16,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-01-18 15:50:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:16,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:19,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:19,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:19,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:19,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:19,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 7 [2022-01-18 15:50:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:19,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433832202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:19,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:19,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:50:19,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999129903] [2022-01-18 15:50:19,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:19,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:50:19,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:50:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=809, Unknown=1, NotChecked=0, Total=930 [2022-01-18 15:50:19,569 INFO L87 Difference]: Start difference. First operand 6272 states and 27884 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:20,722 INFO L93 Difference]: Finished difference Result 7940 states and 34325 transitions. [2022-01-18 15:50:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:50:20,723 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:50:20,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:20,741 INFO L225 Difference]: With dead ends: 7940 [2022-01-18 15:50:20,741 INFO L226 Difference]: Without dead ends: 7889 [2022-01-18 15:50:20,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=432, Invalid=2429, Unknown=1, NotChecked=0, Total=2862 [2022-01-18 15:50:20,742 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 464 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1869 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:20,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 223 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1061 Invalid, 0 Unknown, 1869 Unchecked, 0.4s Time] [2022-01-18 15:50:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7889 states. [2022-01-18 15:50:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7889 to 6271. [2022-01-18 15:50:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 4.446411483253589) internal successors, (27879), 6270 states have internal predecessors, (27879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 27879 transitions. [2022-01-18 15:50:20,857 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 27879 transitions. Word has length 30 [2022-01-18 15:50:20,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:20,857 INFO L470 AbstractCegarLoop]: Abstraction has 6271 states and 27879 transitions. [2022-01-18 15:50:20,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:20,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 27879 transitions. [2022-01-18 15:50:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:20,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:20,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:20,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:21,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:21,070 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:21,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:21,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1823681829, now seen corresponding path program 8 times [2022-01-18 15:50:21,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:21,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009862084] [2022-01-18 15:50:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:21,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:21,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:21,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009862084] [2022-01-18 15:50:21,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009862084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:21,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995787680] [2022-01-18 15:50:21,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:21,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:21,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:21,280 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) [2022-01-18 15:50:21,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-18 15:50:21,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:21,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:21,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:21,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:21,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:21,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:21,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:21,622 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 [2022-01-18 15:50:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:21,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:22,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:22,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:22,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:22,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:50:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:22,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995787680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:22,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:22,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:50:22,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852385075] [2022-01-18 15:50:22,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:22,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:50:22,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:50:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:50:22,108 INFO L87 Difference]: Start difference. First operand 6271 states and 27879 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:25,606 INFO L93 Difference]: Finished difference Result 9392 states and 39493 transitions. [2022-01-18 15:50:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 15:50:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:50:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:25,628 INFO L225 Difference]: With dead ends: 9392 [2022-01-18 15:50:25,628 INFO L226 Difference]: Without dead ends: 9306 [2022-01-18 15:50:25,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=703, Invalid=5617, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 15:50:25,629 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 624 mSDsluCounter, 2122 mSDsCounter, 0 mSdLazyCounter, 3000 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 4740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 3000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1498 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:25,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 290 Invalid, 4740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 3000 Invalid, 0 Unknown, 1498 Unchecked, 1.4s Time] [2022-01-18 15:50:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9306 states. [2022-01-18 15:50:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9306 to 6251. [2022-01-18 15:50:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6251 states, 6250 states have (on average 4.44848) internal successors, (27803), 6250 states have internal predecessors, (27803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6251 states to 6251 states and 27803 transitions. [2022-01-18 15:50:25,757 INFO L78 Accepts]: Start accepts. Automaton has 6251 states and 27803 transitions. Word has length 30 [2022-01-18 15:50:25,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:25,757 INFO L470 AbstractCegarLoop]: Abstraction has 6251 states and 27803 transitions. [2022-01-18 15:50:25,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 6251 states and 27803 transitions. [2022-01-18 15:50:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:25,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:25,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:25,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:25,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:25,980 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash 536507945, now seen corresponding path program 83 times [2022-01-18 15:50:25,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:25,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497028828] [2022-01-18 15:50:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:25,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:26,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:26,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497028828] [2022-01-18 15:50:26,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497028828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:26,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041415349] [2022-01-18 15:50:26,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:50:26,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:26,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:26,196 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) [2022-01-18 15:50:26,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-18 15:50:26,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:50:26,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:26,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:50:26,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:26,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:26,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:26,640 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 25 treesize of output 17 [2022-01-18 15:50:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:26,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:27,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:27,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:27,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:27,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:27,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-01-18 15:50:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:27,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041415349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:27,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:27,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-01-18 15:50:27,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212014108] [2022-01-18 15:50:27,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:27,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 15:50:27,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:27,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 15:50:27,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:50:27,167 INFO L87 Difference]: Start difference. First operand 6251 states and 27803 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:31,045 INFO L93 Difference]: Finished difference Result 10493 states and 43420 transitions. [2022-01-18 15:50:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 15:50:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:50:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:31,069 INFO L225 Difference]: With dead ends: 10493 [2022-01-18 15:50:31,069 INFO L226 Difference]: Without dead ends: 10306 [2022-01-18 15:50:31,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1244, Invalid=11638, Unknown=0, NotChecked=0, Total=12882 [2022-01-18 15:50:31,070 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 795 mSDsluCounter, 3275 mSDsCounter, 0 mSdLazyCounter, 2935 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 6551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3377 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:31,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 354 Invalid, 6551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2935 Invalid, 0 Unknown, 3377 Unchecked, 1.1s Time] [2022-01-18 15:50:31,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10306 states. [2022-01-18 15:50:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10306 to 6307. [2022-01-18 15:50:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6307 states, 6306 states have (on average 4.447193149381541) internal successors, (28044), 6306 states have internal predecessors, (28044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 28044 transitions. [2022-01-18 15:50:31,198 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 28044 transitions. Word has length 30 [2022-01-18 15:50:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:31,198 INFO L470 AbstractCegarLoop]: Abstraction has 6307 states and 28044 transitions. [2022-01-18 15:50:31,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:31,202 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 28044 transitions. [2022-01-18 15:50:31,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:31,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:31,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:31,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-01-18 15:50:31,430 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,SelfDestructingSolverStorable254 [2022-01-18 15:50:31,430 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:31,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:31,430 INFO L85 PathProgramCache]: Analyzing trace with hash 243104938, now seen corresponding path program 2 times [2022-01-18 15:50:31,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:31,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766544783] [2022-01-18 15:50:31,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:31,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:31,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:31,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766544783] [2022-01-18 15:50:31,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766544783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:31,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564594418] [2022-01-18 15:50:31,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:31,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:31,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:31,610 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) [2022-01-18 15:50:31,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-18 15:50:31,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:31,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:31,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:31,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:31,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:31,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:31,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:32,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:32,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:50:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:32,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:32,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:32,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:32,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:32,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:32,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 9 [2022-01-18 15:50:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:32,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564594418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:32,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:32,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-01-18 15:50:32,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109492119] [2022-01-18 15:50:32,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:32,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:50:32,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:32,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:50:32,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:50:32,706 INFO L87 Difference]: Start difference. First operand 6307 states and 28044 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:39,134 INFO L93 Difference]: Finished difference Result 10470 states and 43552 transitions. [2022-01-18 15:50:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 15:50:39,135 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:50:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:39,160 INFO L225 Difference]: With dead ends: 10470 [2022-01-18 15:50:39,161 INFO L226 Difference]: Without dead ends: 10275 [2022-01-18 15:50:39,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1200, Invalid=12372, Unknown=0, NotChecked=0, Total=13572 [2022-01-18 15:50:39,162 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1063 mSDsluCounter, 4164 mSDsCounter, 0 mSdLazyCounter, 5216 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 9038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 5216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3465 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:39,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 506 Invalid, 9038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 5216 Invalid, 0 Unknown, 3465 Unchecked, 2.2s Time] [2022-01-18 15:50:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2022-01-18 15:50:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 6367. [2022-01-18 15:50:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6367 states, 6366 states have (on average 4.446591266101162) internal successors, (28307), 6366 states have internal predecessors, (28307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 28307 transitions. [2022-01-18 15:50:39,305 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 28307 transitions. Word has length 30 [2022-01-18 15:50:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:39,305 INFO L470 AbstractCegarLoop]: Abstraction has 6367 states and 28307 transitions. [2022-01-18 15:50:39,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 28307 transitions. [2022-01-18 15:50:39,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:39,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:39,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:39,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:39,524 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,SelfDestructingSolverStorable255 [2022-01-18 15:50:39,524 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:39,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1591109996, now seen corresponding path program 43 times [2022-01-18 15:50:39,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:39,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343061066] [2022-01-18 15:50:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:39,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:39,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:39,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343061066] [2022-01-18 15:50:39,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343061066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:39,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494471804] [2022-01-18 15:50:39,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:50:39,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:39,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:39,762 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) [2022-01-18 15:50:39,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-18 15:50:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:39,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:39,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:40,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:40,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:40,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:40,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:50:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:40,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:40,353 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:40,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:50:40,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:40,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:40,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:40,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:40,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:50:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:40,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494471804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:40,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:40,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:50:40,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544291411] [2022-01-18 15:50:40,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:40,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:50:40,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:50:40,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:50:40,482 INFO L87 Difference]: Start difference. First operand 6367 states and 28307 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:50:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:41,651 INFO L93 Difference]: Finished difference Result 6932 states and 30519 transitions. [2022-01-18 15:50:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:50:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 30 [2022-01-18 15:50:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:41,667 INFO L225 Difference]: With dead ends: 6932 [2022-01-18 15:50:41,668 INFO L226 Difference]: Without dead ends: 6857 [2022-01-18 15:50:41,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:50:41,668 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:41,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 139 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1845 Invalid, 0 Unknown, 316 Unchecked, 0.7s Time] [2022-01-18 15:50:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2022-01-18 15:50:41,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 6343. [2022-01-18 15:50:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6343 states, 6342 states have (on average 4.4479659413434245) internal successors, (28209), 6342 states have internal predecessors, (28209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 28209 transitions. [2022-01-18 15:50:41,774 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 28209 transitions. Word has length 30 [2022-01-18 15:50:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:41,774 INFO L470 AbstractCegarLoop]: Abstraction has 6343 states and 28209 transitions. [2022-01-18 15:50:41,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:50:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 28209 transitions. [2022-01-18 15:50:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:41,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:41,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:41,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:42,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:42,000 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1520425842, now seen corresponding path program 44 times [2022-01-18 15:50:42,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:42,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910552141] [2022-01-18 15:50:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:42,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:42,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:42,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910552141] [2022-01-18 15:50:42,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910552141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:42,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305773484] [2022-01-18 15:50:42,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:42,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:42,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:42,229 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) [2022-01-18 15:50:42,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-18 15:50:42,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:42,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:42,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:42,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:42,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:42,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:42,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:42,477 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 30 treesize of output 16 [2022-01-18 15:50:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:42,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:42,805 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:42,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:50:42,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:42,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:42,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:50:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:42,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305773484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:42,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:42,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:50:42,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322818414] [2022-01-18 15:50:42,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:42,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:50:42,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:50:42,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:50:42,888 INFO L87 Difference]: Start difference. First operand 6343 states and 28209 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) [2022-01-18 15:50:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:44,885 INFO L93 Difference]: Finished difference Result 7112 states and 31140 transitions. [2022-01-18 15:50:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:50:44,885 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 30 [2022-01-18 15:50:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:44,901 INFO L225 Difference]: With dead ends: 7112 [2022-01-18 15:50:44,901 INFO L226 Difference]: Without dead ends: 7021 [2022-01-18 15:50:44,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=329, Invalid=2751, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 15:50:44,902 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 252 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:44,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 168 Invalid, 2956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2492 Invalid, 0 Unknown, 347 Unchecked, 1.0s Time] [2022-01-18 15:50:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7021 states. [2022-01-18 15:50:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7021 to 6348. [2022-01-18 15:50:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6348 states, 6347 states have (on average 4.448400819284702) internal successors, (28234), 6347 states have internal predecessors, (28234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 28234 transitions. [2022-01-18 15:50:45,055 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 28234 transitions. Word has length 30 [2022-01-18 15:50:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:45,055 INFO L470 AbstractCegarLoop]: Abstraction has 6348 states and 28234 transitions. [2022-01-18 15:50:45,055 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) [2022-01-18 15:50:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 28234 transitions. [2022-01-18 15:50:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:45,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:45,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:45,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:45,281 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,SelfDestructingSolverStorable257 [2022-01-18 15:50:45,281 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:45,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:45,282 INFO L85 PathProgramCache]: Analyzing trace with hash 944566638, now seen corresponding path program 45 times [2022-01-18 15:50:45,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:45,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448454681] [2022-01-18 15:50:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:45,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:45,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:45,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448454681] [2022-01-18 15:50:45,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448454681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:45,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009258785] [2022-01-18 15:50:45,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:50:45,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:45,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:45,519 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) [2022-01-18 15:50:45,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-18 15:50:45,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:50:45,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:45,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:50:45,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:45,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:45,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:45,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:45,781 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 15:50:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:46,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:46,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:46,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:46,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:46,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-01-18 15:50:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:46,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009258785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:46,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:46,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-01-18 15:50:46,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062763974] [2022-01-18 15:50:46,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:46,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:50:46,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:50:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:50:46,674 INFO L87 Difference]: Start difference. First operand 6348 states and 28234 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:49,813 INFO L93 Difference]: Finished difference Result 8237 states and 35805 transitions. [2022-01-18 15:50:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:50:49,813 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:50:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:49,833 INFO L225 Difference]: With dead ends: 8237 [2022-01-18 15:50:49,833 INFO L226 Difference]: Without dead ends: 8167 [2022-01-18 15:50:49,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=716, Invalid=4834, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 15:50:49,834 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 376 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1667 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:49,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 163 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1963 Invalid, 0 Unknown, 1667 Unchecked, 0.9s Time] [2022-01-18 15:50:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8167 states. [2022-01-18 15:50:49,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8167 to 6383. [2022-01-18 15:50:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6383 states, 6382 states have (on average 4.440457536822313) internal successors, (28339), 6382 states have internal predecessors, (28339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 28339 transitions. [2022-01-18 15:50:49,995 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 28339 transitions. Word has length 30 [2022-01-18 15:50:49,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:49,995 INFO L470 AbstractCegarLoop]: Abstraction has 6383 states and 28339 transitions. [2022-01-18 15:50:49,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 28339 transitions. [2022-01-18 15:50:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:50,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:50,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:50,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-01-18 15:50:50,221 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,SelfDestructingSolverStorable258 [2022-01-18 15:50:50,222 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:50,223 INFO L85 PathProgramCache]: Analyzing trace with hash 748053133, now seen corresponding path program 7 times [2022-01-18 15:50:50,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:50,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482222876] [2022-01-18 15:50:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:50,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:50,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:50,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482222876] [2022-01-18 15:50:50,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482222876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:50,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762397458] [2022-01-18 15:50:50,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:50:50,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:50,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:50,441 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) [2022-01-18 15:50:50,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-18 15:50:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:50,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:50,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:50,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:50,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:50,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:50,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 15:50:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:50,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:50,958 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:50,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:50:50,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:50,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:51,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:51,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:51,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:50:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:51,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762397458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:51,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:51,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:50:51,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923943853] [2022-01-18 15:50:51,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:51,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:50:51,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:50:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:50:51,026 INFO L87 Difference]: Start difference. First operand 6383 states and 28339 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:50:52,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:52,051 INFO L93 Difference]: Finished difference Result 6934 states and 30478 transitions. [2022-01-18 15:50:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:50:52,052 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 30 [2022-01-18 15:50:52,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:52,068 INFO L225 Difference]: With dead ends: 6934 [2022-01-18 15:50:52,068 INFO L226 Difference]: Without dead ends: 6885 [2022-01-18 15:50:52,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:50:52,076 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:52,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 157 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2303 Invalid, 0 Unknown, 255 Unchecked, 0.7s Time] [2022-01-18 15:50:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6885 states. [2022-01-18 15:50:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6885 to 6383. [2022-01-18 15:50:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6383 states, 6382 states have (on average 4.440457536822313) internal successors, (28339), 6382 states have internal predecessors, (28339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 28339 transitions. [2022-01-18 15:50:52,186 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 28339 transitions. Word has length 30 [2022-01-18 15:50:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:52,186 INFO L470 AbstractCegarLoop]: Abstraction has 6383 states and 28339 transitions. [2022-01-18 15:50:52,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:50:52,186 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 28339 transitions. [2022-01-18 15:50:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:52,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:52,198 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:52,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:52,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-01-18 15:50:52,412 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:52,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1870047206, now seen corresponding path program 46 times [2022-01-18 15:50:52,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:52,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099592498] [2022-01-18 15:50:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:52,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:52,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:52,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099592498] [2022-01-18 15:50:52,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099592498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:52,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712839887] [2022-01-18 15:50:52,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:50:52,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:52,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:52,644 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) [2022-01-18 15:50:52,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-18 15:50:52,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:50:52,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:52,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:52,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:52,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:52,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:52,905 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 30 treesize of output 16 [2022-01-18 15:50:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:52,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:53,227 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:50:53,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:50:53,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:53,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:53,285 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 25 treesize of output 3 [2022-01-18 15:50:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:53,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712839887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:53,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:53,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-01-18 15:50:53,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095107742] [2022-01-18 15:50:53,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:53,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:50:53,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:53,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:50:53,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:50:53,311 INFO L87 Difference]: Start difference. First operand 6383 states and 28339 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 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) [2022-01-18 15:50:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:54,216 INFO L93 Difference]: Finished difference Result 6931 states and 30484 transitions. [2022-01-18 15:50:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:50:54,217 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 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 30 [2022-01-18 15:50:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:54,233 INFO L225 Difference]: With dead ends: 6931 [2022-01-18 15:50:54,233 INFO L226 Difference]: Without dead ends: 6857 [2022-01-18 15:50:54,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:50:54,234 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:54,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 132 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1737 Invalid, 0 Unknown, 237 Unchecked, 0.7s Time] [2022-01-18 15:50:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2022-01-18 15:50:54,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 6380. [2022-01-18 15:50:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6380 states, 6379 states have (on average 4.440821445367613) internal successors, (28328), 6379 states have internal predecessors, (28328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6380 states to 6380 states and 28328 transitions. [2022-01-18 15:50:54,418 INFO L78 Accepts]: Start accepts. Automaton has 6380 states and 28328 transitions. Word has length 30 [2022-01-18 15:50:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:54,418 INFO L470 AbstractCegarLoop]: Abstraction has 6380 states and 28328 transitions. [2022-01-18 15:50:54,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 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) [2022-01-18 15:50:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6380 states and 28328 transitions. [2022-01-18 15:50:54,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:50:54,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:54,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:54,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:54,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:54,652 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:50:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1221769510, now seen corresponding path program 47 times [2022-01-18 15:50:54,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:54,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400030444] [2022-01-18 15:50:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:54,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:54,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:54,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400030444] [2022-01-18 15:50:54,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400030444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:54,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662078411] [2022-01-18 15:50:54,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:50:54,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:54,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:54,828 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) [2022-01-18 15:50:54,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-18 15:50:54,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:50:54,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:54,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:50:54,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:55,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:55,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:55,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:55,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2022-01-18 15:50:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:55,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:04,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:04,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:04,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:04,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:04,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 7 [2022-01-18 15:51:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:51:04,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662078411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:04,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:04,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:51:04,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543168216] [2022-01-18 15:51:04,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:04,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:51:04,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:51:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=830, Unknown=1, NotChecked=0, Total=930 [2022-01-18 15:51:04,216 INFO L87 Difference]: Start difference. First operand 6380 states and 28328 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) [2022-01-18 15:51:06,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:06,064 INFO L93 Difference]: Finished difference Result 7331 states and 32206 transitions. [2022-01-18 15:51:06,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:51:06,064 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 30 [2022-01-18 15:51:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:06,082 INFO L225 Difference]: With dead ends: 7331 [2022-01-18 15:51:06,082 INFO L226 Difference]: Without dead ends: 7270 [2022-01-18 15:51:06,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=425, Invalid=2766, Unknown=1, NotChecked=0, Total=3192 [2022-01-18 15:51:06,083 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 342 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1208 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:06,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 206 Invalid, 3453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2115 Invalid, 0 Unknown, 1208 Unchecked, 0.8s Time] [2022-01-18 15:51:06,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7270 states. [2022-01-18 15:51:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7270 to 6379. [2022-01-18 15:51:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6379 states, 6378 states have (on average 4.441047350266541) internal successors, (28325), 6378 states have internal predecessors, (28325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6379 states to 6379 states and 28325 transitions. [2022-01-18 15:51:06,190 INFO L78 Accepts]: Start accepts. Automaton has 6379 states and 28325 transitions. Word has length 30 [2022-01-18 15:51:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:06,190 INFO L470 AbstractCegarLoop]: Abstraction has 6379 states and 28325 transitions. [2022-01-18 15:51:06,190 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) [2022-01-18 15:51:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 6379 states and 28325 transitions. [2022-01-18 15:51:06,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:06,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:06,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:06,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:06,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:06,406 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:06,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:06,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1775554242, now seen corresponding path program 48 times [2022-01-18 15:51:06,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:06,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146832261] [2022-01-18 15:51:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:06,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:06,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:06,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146832261] [2022-01-18 15:51:06,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146832261] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:06,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771136703] [2022-01-18 15:51:06,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:51:06,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:06,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:06,657 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) [2022-01-18 15:51:06,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-18 15:51:06,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:51:06,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:06,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:51:06,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:06,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:06,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:06,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:06,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:51:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:07,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:07,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:07,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:07,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:07,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:07,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:51:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:07,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771136703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:07,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:07,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2022-01-18 15:51:07,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871126496] [2022-01-18 15:51:07,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:07,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:51:07,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:51:07,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:51:07,382 INFO L87 Difference]: Start difference. First operand 6379 states and 28325 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 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) [2022-01-18 15:51:12,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:12,845 INFO L93 Difference]: Finished difference Result 10071 states and 41893 transitions. [2022-01-18 15:51:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-18 15:51:12,845 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 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 30 [2022-01-18 15:51:12,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:12,870 INFO L225 Difference]: With dead ends: 10071 [2022-01-18 15:51:12,870 INFO L226 Difference]: Without dead ends: 9796 [2022-01-18 15:51:12,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1630, Invalid=11942, Unknown=0, NotChecked=0, Total=13572 [2022-01-18 15:51:12,871 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1184 mSDsluCounter, 2179 mSDsCounter, 0 mSdLazyCounter, 4362 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 4807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 4362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:12,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 349 Invalid, 4807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 4362 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-18 15:51:12,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9796 states. [2022-01-18 15:51:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9796 to 6455. [2022-01-18 15:51:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6455 states, 6454 states have (on average 4.439572358227456) internal successors, (28653), 6454 states have internal predecessors, (28653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6455 states to 6455 states and 28653 transitions. [2022-01-18 15:51:13,024 INFO L78 Accepts]: Start accepts. Automaton has 6455 states and 28653 transitions. Word has length 30 [2022-01-18 15:51:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:13,024 INFO L470 AbstractCegarLoop]: Abstraction has 6455 states and 28653 transitions. [2022-01-18 15:51:13,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 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) [2022-01-18 15:51:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 6455 states and 28653 transitions. [2022-01-18 15:51:13,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:13,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:13,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:13,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:13,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:13,252 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:13,252 INFO L85 PathProgramCache]: Analyzing trace with hash 202007004, now seen corresponding path program 49 times [2022-01-18 15:51:13,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:13,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294145268] [2022-01-18 15:51:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:13,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:13,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:13,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294145268] [2022-01-18 15:51:13,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294145268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:13,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940558231] [2022-01-18 15:51:13,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:51:13,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:13,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:13,361 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) [2022-01-18 15:51:13,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-18 15:51:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:13,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:13,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:13,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:51:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:13,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:13,831 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:13,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:51:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:13,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940558231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:13,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:13,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:51:13,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608631675] [2022-01-18 15:51:13,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:13,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:51:13,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:13,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:51:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:51:13,952 INFO L87 Difference]: Start difference. First operand 6455 states and 28653 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) [2022-01-18 15:51:15,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:15,786 INFO L93 Difference]: Finished difference Result 7909 states and 34496 transitions. [2022-01-18 15:51:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:51:15,787 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 30 [2022-01-18 15:51:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:15,805 INFO L225 Difference]: With dead ends: 7909 [2022-01-18 15:51:15,805 INFO L226 Difference]: Without dead ends: 7842 [2022-01-18 15:51:15,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=2396, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:51:15,805 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 347 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 2721 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:15,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 150 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2721 Invalid, 0 Unknown, 191 Unchecked, 1.0s Time] [2022-01-18 15:51:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2022-01-18 15:51:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 6444. [2022-01-18 15:51:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6444 states, 6443 states have (on average 4.4407884525842) internal successors, (28612), 6443 states have internal predecessors, (28612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6444 states to 6444 states and 28612 transitions. [2022-01-18 15:51:15,981 INFO L78 Accepts]: Start accepts. Automaton has 6444 states and 28612 transitions. Word has length 30 [2022-01-18 15:51:15,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:15,981 INFO L470 AbstractCegarLoop]: Abstraction has 6444 states and 28612 transitions. [2022-01-18 15:51:15,981 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) [2022-01-18 15:51:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 6444 states and 28612 transitions. [2022-01-18 15:51:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:15,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:15,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:16,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:16,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:16,195 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:16,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:16,196 INFO L85 PathProgramCache]: Analyzing trace with hash -846251220, now seen corresponding path program 50 times [2022-01-18 15:51:16,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:16,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140975529] [2022-01-18 15:51:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:16,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:16,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:16,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140975529] [2022-01-18 15:51:16,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140975529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:16,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429860110] [2022-01-18 15:51:16,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:51:16,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:16,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:16,387 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) [2022-01-18 15:51:16,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-18 15:51:16,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:16,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:16,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:16,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:16,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:16,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:16,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 15:51:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:16,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:16,888 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:16,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:51:16,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:16,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:16,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:16,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:51:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:16,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429860110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:16,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:16,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:51:16,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530764706] [2022-01-18 15:51:16,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:16,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:51:16,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:16,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:51:16,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:51:16,967 INFO L87 Difference]: Start difference. First operand 6444 states and 28612 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:51:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:18,262 INFO L93 Difference]: Finished difference Result 7015 states and 30821 transitions. [2022-01-18 15:51:18,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:51:18,262 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 30 [2022-01-18 15:51:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:18,280 INFO L225 Difference]: With dead ends: 7015 [2022-01-18 15:51:18,281 INFO L226 Difference]: Without dead ends: 6964 [2022-01-18 15:51:18,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:51:18,281 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 2342 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:18,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 144 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2342 Invalid, 0 Unknown, 144 Unchecked, 0.9s Time] [2022-01-18 15:51:18,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6964 states. [2022-01-18 15:51:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6964 to 6452. [2022-01-18 15:51:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 6451 states have (on average 4.440241822973182) internal successors, (28644), 6451 states have internal predecessors, (28644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 28644 transitions. [2022-01-18 15:51:18,401 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 28644 transitions. Word has length 30 [2022-01-18 15:51:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:18,402 INFO L470 AbstractCegarLoop]: Abstraction has 6452 states and 28644 transitions. [2022-01-18 15:51:18,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:51:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 28644 transitions. [2022-01-18 15:51:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:18,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:18,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:18,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:18,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:18,629 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:18,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:18,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1727271557, now seen corresponding path program 8 times [2022-01-18 15:51:18,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:18,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706417069] [2022-01-18 15:51:18,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:18,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:18,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:18,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706417069] [2022-01-18 15:51:18,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706417069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:18,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037081270] [2022-01-18 15:51:18,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:51:18,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:18,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:18,750 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) [2022-01-18 15:51:18,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-18 15:51:18,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:18,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:18,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:18,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:18,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:51:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:19,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:19,220 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:19,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:51:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:19,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037081270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:19,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:19,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:51:19,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688971762] [2022-01-18 15:51:19,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:19,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:51:19,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:51:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:51:19,311 INFO L87 Difference]: Start difference. First operand 6452 states and 28644 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:21,148 INFO L93 Difference]: Finished difference Result 7921 states and 34625 transitions. [2022-01-18 15:51:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:51:21,148 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:51:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:21,166 INFO L225 Difference]: With dead ends: 7921 [2022-01-18 15:51:21,166 INFO L226 Difference]: Without dead ends: 7830 [2022-01-18 15:51:21,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=2047, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:51:21,166 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 327 mSDsluCounter, 1978 mSDsCounter, 0 mSdLazyCounter, 4048 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 4267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 4048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:21,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 242 Invalid, 4267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 4048 Invalid, 0 Unknown, 55 Unchecked, 1.3s Time] [2022-01-18 15:51:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7830 states. [2022-01-18 15:51:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7830 to 6292. [2022-01-18 15:51:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6292 states, 6291 states have (on average 4.449848990621523) internal successors, (27994), 6291 states have internal predecessors, (27994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6292 states to 6292 states and 27994 transitions. [2022-01-18 15:51:21,279 INFO L78 Accepts]: Start accepts. Automaton has 6292 states and 27994 transitions. Word has length 30 [2022-01-18 15:51:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:21,280 INFO L470 AbstractCegarLoop]: Abstraction has 6292 states and 27994 transitions. [2022-01-18 15:51:21,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 6292 states and 27994 transitions. [2022-01-18 15:51:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:21,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:21,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:21,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-01-18 15:51:21,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:21,495 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:21,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1680302641, now seen corresponding path program 84 times [2022-01-18 15:51:21,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:21,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852966497] [2022-01-18 15:51:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:21,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:21,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:21,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852966497] [2022-01-18 15:51:21,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852966497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:21,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713107227] [2022-01-18 15:51:21,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:51:21,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:21,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:21,670 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) [2022-01-18 15:51:21,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-18 15:51:21,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:51:21,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:21,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:21,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:21,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:21,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:21,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 15:51:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:21,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:22,074 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:22,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:51:22,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:22,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:22,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:51:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:22,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713107227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:22,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:22,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:51:22,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997280420] [2022-01-18 15:51:22,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:22,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:51:22,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:51:22,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:51:22,175 INFO L87 Difference]: Start difference. First operand 6292 states and 27994 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:51:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:24,026 INFO L93 Difference]: Finished difference Result 7057 states and 31006 transitions. [2022-01-18 15:51:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:51:24,026 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 30 [2022-01-18 15:51:24,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:24,042 INFO L225 Difference]: With dead ends: 7057 [2022-01-18 15:51:24,042 INFO L226 Difference]: Without dead ends: 7006 [2022-01-18 15:51:24,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=353, Invalid=2839, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:51:24,043 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 241 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:24,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 171 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2394 Invalid, 0 Unknown, 284 Unchecked, 0.8s Time] [2022-01-18 15:51:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7006 states. [2022-01-18 15:51:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7006 to 6345. [2022-01-18 15:51:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6345 states, 6344 states have (on average 4.450662042875158) internal successors, (28235), 6344 states have internal predecessors, (28235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6345 states to 6345 states and 28235 transitions. [2022-01-18 15:51:24,215 INFO L78 Accepts]: Start accepts. Automaton has 6345 states and 28235 transitions. Word has length 30 [2022-01-18 15:51:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:24,215 INFO L470 AbstractCegarLoop]: Abstraction has 6345 states and 28235 transitions. [2022-01-18 15:51:24,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:51:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 6345 states and 28235 transitions. [2022-01-18 15:51:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:24,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:24,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:24,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:24,442 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,SelfDestructingSolverStorable266 [2022-01-18 15:51:24,442 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:24,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:24,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1476970643, now seen corresponding path program 85 times [2022-01-18 15:51:24,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:24,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860255510] [2022-01-18 15:51:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:24,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:24,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:24,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860255510] [2022-01-18 15:51:24,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860255510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:24,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524432041] [2022-01-18 15:51:24,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:51:24,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:24,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:24,696 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) [2022-01-18 15:51:24,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-18 15:51:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:24,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:24,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:24,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:24,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:24,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:24,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:51:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:25,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:25,308 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:25,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:51:25,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:25,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:25,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:25,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:25,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:51:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:25,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524432041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:25,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:25,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:51:25,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976303601] [2022-01-18 15:51:25,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:25,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:51:25,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:51:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:51:25,393 INFO L87 Difference]: Start difference. First operand 6345 states and 28235 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:51:27,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:27,842 INFO L93 Difference]: Finished difference Result 6947 states and 30538 transitions. [2022-01-18 15:51:27,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:51:27,843 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 30 [2022-01-18 15:51:27,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:27,859 INFO L225 Difference]: With dead ends: 6947 [2022-01-18 15:51:27,859 INFO L226 Difference]: Without dead ends: 6876 [2022-01-18 15:51:27,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=323, Invalid=2757, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 15:51:27,860 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 238 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 719 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:27,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 191 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2328 Invalid, 0 Unknown, 719 Unchecked, 1.0s Time] [2022-01-18 15:51:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2022-01-18 15:51:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 6330. [2022-01-18 15:51:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6330 states, 6329 states have (on average 4.450624111234002) internal successors, (28168), 6329 states have internal predecessors, (28168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6330 states to 6330 states and 28168 transitions. [2022-01-18 15:51:27,966 INFO L78 Accepts]: Start accepts. Automaton has 6330 states and 28168 transitions. Word has length 30 [2022-01-18 15:51:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:27,966 INFO L470 AbstractCegarLoop]: Abstraction has 6330 states and 28168 transitions. [2022-01-18 15:51:27,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-01-18 15:51:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 6330 states and 28168 transitions. [2022-01-18 15:51:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:27,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:27,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:27,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-01-18 15:51:28,191 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,SelfDestructingSolverStorable267 [2022-01-18 15:51:28,191 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:28,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:28,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1571658135, now seen corresponding path program 1 times [2022-01-18 15:51:28,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:28,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493147790] [2022-01-18 15:51:28,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:28,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:28,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:28,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493147790] [2022-01-18 15:51:28,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493147790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:28,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467897484] [2022-01-18 15:51:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:28,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:28,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:28,409 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) [2022-01-18 15:51:28,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-18 15:51:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:28,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:28,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:28,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:28,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:28,667 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 30 treesize of output 16 [2022-01-18 15:51:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:28,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:28,933 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:28,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:51:28,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:28,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:28,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:28,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:28,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:51:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:28,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467897484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:28,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:28,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-01-18 15:51:28,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403040750] [2022-01-18 15:51:28,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:28,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:51:28,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:28,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:51:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:51:28,993 INFO L87 Difference]: Start difference. First operand 6330 states and 28168 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:29,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:29,778 INFO L93 Difference]: Finished difference Result 6778 states and 29943 transitions. [2022-01-18 15:51:29,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:51:29,778 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:51:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:29,797 INFO L225 Difference]: With dead ends: 6778 [2022-01-18 15:51:29,797 INFO L226 Difference]: Without dead ends: 6737 [2022-01-18 15:51:29,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:51:29,798 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:29,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 115 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1397 Invalid, 0 Unknown, 313 Unchecked, 0.5s Time] [2022-01-18 15:51:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2022-01-18 15:51:29,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 6347. [2022-01-18 15:51:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6347 states, 6346 states have (on average 4.449889694295619) internal successors, (28239), 6346 states have internal predecessors, (28239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6347 states to 6347 states and 28239 transitions. [2022-01-18 15:51:29,927 INFO L78 Accepts]: Start accepts. Automaton has 6347 states and 28239 transitions. Word has length 30 [2022-01-18 15:51:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:29,927 INFO L470 AbstractCegarLoop]: Abstraction has 6347 states and 28239 transitions. [2022-01-18 15:51:29,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 6347 states and 28239 transitions. [2022-01-18 15:51:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:29,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:29,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:29,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-01-18 15:51:30,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-01-18 15:51:30,150 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:30,150 INFO L85 PathProgramCache]: Analyzing trace with hash 335385315, now seen corresponding path program 2 times [2022-01-18 15:51:30,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:30,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106943568] [2022-01-18 15:51:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:30,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:30,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:30,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106943568] [2022-01-18 15:51:30,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106943568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:30,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865663722] [2022-01-18 15:51:30,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:51:30,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:30,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:30,368 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) [2022-01-18 15:51:30,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-18 15:51:30,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:30,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:30,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:51:30,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:30,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:30,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:30,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:30,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:30,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-01-18 15:51:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:30,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:30,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:30,956 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:51:30,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:51:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:31,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865663722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:31,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:31,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-01-18 15:51:31,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390966738] [2022-01-18 15:51:31,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:31,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:51:31,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:51:31,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:51:31,055 INFO L87 Difference]: Start difference. First operand 6347 states and 28239 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:51:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:31,946 INFO L93 Difference]: Finished difference Result 6695 states and 29584 transitions. [2022-01-18 15:51:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:51:31,946 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 30 [2022-01-18 15:51:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:31,962 INFO L225 Difference]: With dead ends: 6695 [2022-01-18 15:51:31,963 INFO L226 Difference]: Without dead ends: 6688 [2022-01-18 15:51:31,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:51:31,963 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:31,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 129 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1475 Invalid, 0 Unknown, 502 Unchecked, 0.5s Time] [2022-01-18 15:51:31,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2022-01-18 15:51:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 6391. [2022-01-18 15:51:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6391 states, 6390 states have (on average 4.44585289514867) internal successors, (28409), 6390 states have internal predecessors, (28409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 28409 transitions. [2022-01-18 15:51:32,069 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 28409 transitions. Word has length 30 [2022-01-18 15:51:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:32,069 INFO L470 AbstractCegarLoop]: Abstraction has 6391 states and 28409 transitions. [2022-01-18 15:51:32,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:51:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 28409 transitions. [2022-01-18 15:51:32,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:32,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:32,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:32,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:32,295 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,SelfDestructingSolverStorable269 [2022-01-18 15:51:32,295 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:32,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:32,295 INFO L85 PathProgramCache]: Analyzing trace with hash 336308836, now seen corresponding path program 1 times [2022-01-18 15:51:32,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:32,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893434700] [2022-01-18 15:51:32,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:32,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:32,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:32,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893434700] [2022-01-18 15:51:32,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893434700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:32,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540753047] [2022-01-18 15:51:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:32,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:32,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:32,510 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) [2022-01-18 15:51:32,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-18 15:51:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:32,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:32,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:32,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:32,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:32,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:32,834 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 30 treesize of output 16 [2022-01-18 15:51:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:32,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:33,125 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:33,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:51:33,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:33,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:33,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:33,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:33,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:51:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:33,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540753047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:33,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:33,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-01-18 15:51:33,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906416532] [2022-01-18 15:51:33,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:33,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:51:33,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:51:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:51:33,201 INFO L87 Difference]: Start difference. First operand 6391 states and 28409 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2022-01-18 15:51:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:34,066 INFO L93 Difference]: Finished difference Result 6853 states and 30206 transitions. [2022-01-18 15:51:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:51:34,066 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 30 [2022-01-18 15:51:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:34,082 INFO L225 Difference]: With dead ends: 6853 [2022-01-18 15:51:34,082 INFO L226 Difference]: Without dead ends: 6770 [2022-01-18 15:51:34,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:51:34,082 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:34,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 119 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1478 Invalid, 0 Unknown, 259 Unchecked, 0.6s Time] [2022-01-18 15:51:34,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6770 states. [2022-01-18 15:51:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6770 to 6369. [2022-01-18 15:51:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6368 states have (on average 4.4486494974874375) internal successors, (28329), 6368 states have internal predecessors, (28329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 28329 transitions. [2022-01-18 15:51:34,186 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 28329 transitions. Word has length 30 [2022-01-18 15:51:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:34,187 INFO L470 AbstractCegarLoop]: Abstraction has 6369 states and 28329 transitions. [2022-01-18 15:51:34,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2022-01-18 15:51:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 28329 transitions. [2022-01-18 15:51:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:34,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:34,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:34,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:34,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:34,413 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:34,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1224881418, now seen corresponding path program 1 times [2022-01-18 15:51:34,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:34,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442031848] [2022-01-18 15:51:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:34,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:34,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:34,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442031848] [2022-01-18 15:51:34,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442031848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:34,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068568323] [2022-01-18 15:51:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:34,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:34,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:34,564 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) [2022-01-18 15:51:34,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-18 15:51:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:34,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:34,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:34,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:34,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:34,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:34,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 15:51:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:34,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:35,006 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:35,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:51:35,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:35,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:35,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:35,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:35,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:51:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:35,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068568323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:35,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:35,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-01-18 15:51:35,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137332343] [2022-01-18 15:51:35,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:35,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:51:35,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:35,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:51:35,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:51:35,065 INFO L87 Difference]: Start difference. First operand 6369 states and 28329 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:35,906 INFO L93 Difference]: Finished difference Result 6768 states and 29896 transitions. [2022-01-18 15:51:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:51:35,906 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:51:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:35,922 INFO L225 Difference]: With dead ends: 6768 [2022-01-18 15:51:35,922 INFO L226 Difference]: Without dead ends: 6727 [2022-01-18 15:51:35,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:51:35,922 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 109 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:35,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 161 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1466 Invalid, 0 Unknown, 526 Unchecked, 0.5s Time] [2022-01-18 15:51:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2022-01-18 15:51:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6380. [2022-01-18 15:51:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6380 states, 6379 states have (on average 4.4470920206928986) internal successors, (28368), 6379 states have internal predecessors, (28368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:36,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6380 states to 6380 states and 28368 transitions. [2022-01-18 15:51:36,034 INFO L78 Accepts]: Start accepts. Automaton has 6380 states and 28368 transitions. Word has length 30 [2022-01-18 15:51:36,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:36,035 INFO L470 AbstractCegarLoop]: Abstraction has 6380 states and 28368 transitions. [2022-01-18 15:51:36,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 6380 states and 28368 transitions. [2022-01-18 15:51:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:36,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:36,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:36,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-01-18 15:51:36,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-01-18 15:51:36,252 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:36,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:36,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1633209866, now seen corresponding path program 2 times [2022-01-18 15:51:36,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:36,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398213810] [2022-01-18 15:51:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:36,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:36,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:36,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398213810] [2022-01-18 15:51:36,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398213810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:36,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260664133] [2022-01-18 15:51:36,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:51:36,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:36,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:36,470 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) [2022-01-18 15:51:36,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-18 15:51:36,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:36,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:36,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:51:36,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:36,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:36,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:36,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-01-18 15:51:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:36,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:37,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:37,127 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:51:37,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:51:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:37,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260664133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:37,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:37,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-01-18 15:51:37,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72390877] [2022-01-18 15:51:37,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:37,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:51:37,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:37,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:51:37,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:51:37,234 INFO L87 Difference]: Start difference. First operand 6380 states and 28368 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) [2022-01-18 15:51:38,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:38,135 INFO L93 Difference]: Finished difference Result 6953 states and 30620 transitions. [2022-01-18 15:51:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:51:38,136 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 30 [2022-01-18 15:51:38,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:38,153 INFO L225 Difference]: With dead ends: 6953 [2022-01-18 15:51:38,153 INFO L226 Difference]: Without dead ends: 6888 [2022-01-18 15:51:38,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:51:38,154 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:38,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 117 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1491 Invalid, 0 Unknown, 583 Unchecked, 0.5s Time] [2022-01-18 15:51:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6888 states. [2022-01-18 15:51:38,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6888 to 6393. [2022-01-18 15:51:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6393 states, 6392 states have (on average 4.446495619524406) internal successors, (28422), 6392 states have internal predecessors, (28422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6393 states to 6393 states and 28422 transitions. [2022-01-18 15:51:38,276 INFO L78 Accepts]: Start accepts. Automaton has 6393 states and 28422 transitions. Word has length 30 [2022-01-18 15:51:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:38,276 INFO L470 AbstractCegarLoop]: Abstraction has 6393 states and 28422 transitions. [2022-01-18 15:51:38,276 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) [2022-01-18 15:51:38,276 INFO L276 IsEmpty]: Start isEmpty. Operand 6393 states and 28422 transitions. [2022-01-18 15:51:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:38,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:38,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:38,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-01-18 15:51:38,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:38,495 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:38,496 INFO L85 PathProgramCache]: Analyzing trace with hash -26172115, now seen corresponding path program 3 times [2022-01-18 15:51:38,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:38,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35141166] [2022-01-18 15:51:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:38,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:38,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:38,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35141166] [2022-01-18 15:51:38,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35141166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:38,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708720248] [2022-01-18 15:51:38,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:51:38,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:38,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:38,753 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) [2022-01-18 15:51:38,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-18 15:51:38,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:51:38,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:38,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:51:38,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:39,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:39,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:39,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:39,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 15:51:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:39,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:39,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:39,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:39,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:39,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-01-18 15:51:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:39,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708720248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:39,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:39,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-01-18 15:51:39,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015189271] [2022-01-18 15:51:39,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:39,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:51:39,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:39,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:51:39,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:51:39,829 INFO L87 Difference]: Start difference. First operand 6393 states and 28422 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:42,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:42,637 INFO L93 Difference]: Finished difference Result 8316 states and 36524 transitions. [2022-01-18 15:51:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 15:51:42,637 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:51:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:42,657 INFO L225 Difference]: With dead ends: 8316 [2022-01-18 15:51:42,657 INFO L226 Difference]: Without dead ends: 8255 [2022-01-18 15:51:42,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=807, Invalid=4743, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 15:51:42,657 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2274 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:42,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 165 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1457 Invalid, 0 Unknown, 2274 Unchecked, 0.6s Time] [2022-01-18 15:51:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2022-01-18 15:51:42,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 6477. [2022-01-18 15:51:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6477 states, 6476 states have (on average 4.452748610253242) internal successors, (28836), 6476 states have internal predecessors, (28836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6477 states to 6477 states and 28836 transitions. [2022-01-18 15:51:42,779 INFO L78 Accepts]: Start accepts. Automaton has 6477 states and 28836 transitions. Word has length 30 [2022-01-18 15:51:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:42,779 INFO L470 AbstractCegarLoop]: Abstraction has 6477 states and 28836 transitions. [2022-01-18 15:51:42,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 6477 states and 28836 transitions. [2022-01-18 15:51:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:42,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:42,791 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:42,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-01-18 15:51:43,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:43,005 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1602612470, now seen corresponding path program 3 times [2022-01-18 15:51:43,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:43,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364411059] [2022-01-18 15:51:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:43,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:43,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:43,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364411059] [2022-01-18 15:51:43,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364411059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:43,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866379180] [2022-01-18 15:51:43,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:51:43,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:43,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:43,161 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) [2022-01-18 15:51:43,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-18 15:51:43,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:51:43,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:43,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:43,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:43,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:43,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:43,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:43,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:43,463 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 [2022-01-18 15:51:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:43,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:43,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:43,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:43,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:43,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:43,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:51:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:43,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866379180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:43,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:43,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:51:43,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427498990] [2022-01-18 15:51:43,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:43,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:51:43,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:51:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:51:43,979 INFO L87 Difference]: Start difference. First operand 6477 states and 28836 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:47,345 INFO L93 Difference]: Finished difference Result 9019 states and 38457 transitions. [2022-01-18 15:51:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 15:51:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:51:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:47,366 INFO L225 Difference]: With dead ends: 9019 [2022-01-18 15:51:47,366 INFO L226 Difference]: Without dead ends: 8877 [2022-01-18 15:51:47,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=610, Invalid=5090, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 15:51:47,367 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 553 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 2729 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 4840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1926 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:47,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 278 Invalid, 4840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2729 Invalid, 0 Unknown, 1926 Unchecked, 1.2s Time] [2022-01-18 15:51:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8877 states. [2022-01-18 15:51:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8877 to 6479. [2022-01-18 15:51:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6479 states, 6478 states have (on average 4.452917567150355) internal successors, (28846), 6478 states have internal predecessors, (28846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:47,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6479 states to 6479 states and 28846 transitions. [2022-01-18 15:51:47,493 INFO L78 Accepts]: Start accepts. Automaton has 6479 states and 28846 transitions. Word has length 30 [2022-01-18 15:51:47,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:47,493 INFO L470 AbstractCegarLoop]: Abstraction has 6479 states and 28846 transitions. [2022-01-18 15:51:47,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:47,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6479 states and 28846 transitions. [2022-01-18 15:51:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:47,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:47,504 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:47,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:47,719 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,SelfDestructingSolverStorable274 [2022-01-18 15:51:47,719 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:47,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1037073236, now seen corresponding path program 4 times [2022-01-18 15:51:47,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:47,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402110502] [2022-01-18 15:51:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:47,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:47,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:47,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402110502] [2022-01-18 15:51:47,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402110502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:47,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7267086] [2022-01-18 15:51:47,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:51:47,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:47,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:47,910 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) [2022-01-18 15:51:47,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-18 15:51:47,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:51:47,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:48,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:48,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:48,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:48,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:51:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:48,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:48,379 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:48,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:51:48,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:48,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:48,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:48,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:48,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:51:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:48,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7267086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:48,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:48,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:51:48,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216040134] [2022-01-18 15:51:48,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:48,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:51:48,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:48,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:51:48,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:51:48,473 INFO L87 Difference]: Start difference. First operand 6479 states and 28846 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) [2022-01-18 15:51:49,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:49,750 INFO L93 Difference]: Finished difference Result 6872 states and 30385 transitions. [2022-01-18 15:51:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:51:49,750 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 30 [2022-01-18 15:51:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:49,767 INFO L225 Difference]: With dead ends: 6872 [2022-01-18 15:51:49,767 INFO L226 Difference]: Without dead ends: 6799 [2022-01-18 15:51:49,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:51:49,768 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 2070 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 496 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:49,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 146 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2070 Invalid, 0 Unknown, 496 Unchecked, 0.8s Time] [2022-01-18 15:51:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6799 states. [2022-01-18 15:51:49,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6799 to 6497. [2022-01-18 15:51:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6497 states, 6496 states have (on average 4.453509852216749) internal successors, (28930), 6496 states have internal predecessors, (28930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6497 states to 6497 states and 28930 transitions. [2022-01-18 15:51:49,912 INFO L78 Accepts]: Start accepts. Automaton has 6497 states and 28930 transitions. Word has length 30 [2022-01-18 15:51:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:49,912 INFO L470 AbstractCegarLoop]: Abstraction has 6497 states and 28930 transitions. [2022-01-18 15:51:49,912 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) [2022-01-18 15:51:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 6497 states and 28930 transitions. [2022-01-18 15:51:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:49,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:49,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:49,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:50,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:50,138 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:50,139 INFO L85 PathProgramCache]: Analyzing trace with hash 869970214, now seen corresponding path program 5 times [2022-01-18 15:51:50,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:50,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961866633] [2022-01-18 15:51:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:50,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:50,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:50,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961866633] [2022-01-18 15:51:50,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961866633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:50,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391016421] [2022-01-18 15:51:50,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:51:50,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:50,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:50,410 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) [2022-01-18 15:51:50,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-18 15:51:50,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:51:50,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:50,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:50,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:50,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:50,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:50,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:51:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:50,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:50,978 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:50,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:51:51,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:51,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:51,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:51,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:51,011 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:51:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:51,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391016421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:51,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:51,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-01-18 15:51:51,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494870495] [2022-01-18 15:51:51,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:51,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:51:51,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:51,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:51:51,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:51:51,028 INFO L87 Difference]: Start difference. First operand 6497 states and 28930 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:51:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:51,956 INFO L93 Difference]: Finished difference Result 6873 states and 30389 transitions. [2022-01-18 15:51:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:51:51,956 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 30 [2022-01-18 15:51:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:51,974 INFO L225 Difference]: With dead ends: 6873 [2022-01-18 15:51:51,974 INFO L226 Difference]: Without dead ends: 6816 [2022-01-18 15:51:51,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:51:51,974 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:51,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 124 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1842 Invalid, 0 Unknown, 438 Unchecked, 0.6s Time] [2022-01-18 15:51:51,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6816 states. [2022-01-18 15:51:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6816 to 6522. [2022-01-18 15:51:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6522 states, 6521 states have (on average 4.4533047078668915) internal successors, (29040), 6521 states have internal predecessors, (29040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6522 states to 6522 states and 29040 transitions. [2022-01-18 15:51:52,098 INFO L78 Accepts]: Start accepts. Automaton has 6522 states and 29040 transitions. Word has length 30 [2022-01-18 15:51:52,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:52,098 INFO L470 AbstractCegarLoop]: Abstraction has 6522 states and 29040 transitions. [2022-01-18 15:51:52,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-01-18 15:51:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 6522 states and 29040 transitions. [2022-01-18 15:51:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:52,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:52,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:52,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:52,327 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,SelfDestructingSolverStorable276 [2022-01-18 15:51:52,327 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:52,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:52,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2007075688, now seen corresponding path program 6 times [2022-01-18 15:51:52,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:52,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95440856] [2022-01-18 15:51:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:52,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:52,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:52,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95440856] [2022-01-18 15:51:52,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95440856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:52,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282667207] [2022-01-18 15:51:52,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:51:52,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:52,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:52,503 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) [2022-01-18 15:51:52,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-18 15:51:52,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:51:52,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:52,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:51:52,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:52,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:52,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:52,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2022-01-18 15:51:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:52,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:53,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:53,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:53,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:53,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:51:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:53,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282667207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:53,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:53,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 15:51:53,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585157879] [2022-01-18 15:51:53,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:53,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:51:53,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:53,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:51:53,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:51:53,353 INFO L87 Difference]: Start difference. First operand 6522 states and 29040 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:56,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:56,348 INFO L93 Difference]: Finished difference Result 8883 states and 38035 transitions. [2022-01-18 15:51:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 15:51:56,349 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:51:56,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:56,376 INFO L225 Difference]: With dead ends: 8883 [2022-01-18 15:51:56,376 INFO L226 Difference]: Without dead ends: 8705 [2022-01-18 15:51:56,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=591, Invalid=4811, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 15:51:56,377 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 498 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 3053 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1370 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:56,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 243 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3053 Invalid, 0 Unknown, 1370 Unchecked, 1.1s Time] [2022-01-18 15:51:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8705 states. [2022-01-18 15:51:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8705 to 6540. [2022-01-18 15:51:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 6539 states have (on average 4.452974460926748) internal successors, (29118), 6539 states have internal predecessors, (29118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:56,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 29118 transitions. [2022-01-18 15:51:56,518 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 29118 transitions. Word has length 30 [2022-01-18 15:51:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:56,519 INFO L470 AbstractCegarLoop]: Abstraction has 6540 states and 29118 transitions. [2022-01-18 15:51:56,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:56,519 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 29118 transitions. [2022-01-18 15:51:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:56,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:56,532 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:56,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-01-18 15:51:56,741 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,SelfDestructingSolverStorable277 [2022-01-18 15:51:56,741 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash 707290770, now seen corresponding path program 7 times [2022-01-18 15:51:56,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:56,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194766945] [2022-01-18 15:51:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:56,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:57,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:57,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194766945] [2022-01-18 15:51:57,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194766945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:57,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777497281] [2022-01-18 15:51:57,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:51:57,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:57,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:57,010 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) [2022-01-18 15:51:57,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-18 15:51:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:57,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:57,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:57,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:57,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:57,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:57,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:51:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:57,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:57,475 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:51:57,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:51:57,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:57,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:57,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:57,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:57,522 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 25 treesize of output 3 [2022-01-18 15:51:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:57,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777497281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:57,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:57,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:51:57,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534236932] [2022-01-18 15:51:57,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:57,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:51:57,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:57,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:51:57,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:51:57,539 INFO L87 Difference]: Start difference. First operand 6540 states and 29118 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) [2022-01-18 15:51:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:58,392 INFO L93 Difference]: Finished difference Result 6944 states and 30684 transitions. [2022-01-18 15:51:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:51:58,392 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 30 [2022-01-18 15:51:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:58,445 INFO L225 Difference]: With dead ends: 6944 [2022-01-18 15:51:58,446 INFO L226 Difference]: Without dead ends: 6871 [2022-01-18 15:51:58,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:51:58,446 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:58,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 129 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1889 Invalid, 0 Unknown, 253 Unchecked, 0.6s Time] [2022-01-18 15:51:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2022-01-18 15:51:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 6546. [2022-01-18 15:51:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6546 states, 6545 states have (on average 4.453170359052712) internal successors, (29146), 6545 states have internal predecessors, (29146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6546 states to 6546 states and 29146 transitions. [2022-01-18 15:51:58,548 INFO L78 Accepts]: Start accepts. Automaton has 6546 states and 29146 transitions. Word has length 30 [2022-01-18 15:51:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:58,548 INFO L470 AbstractCegarLoop]: Abstraction has 6546 states and 29146 transitions. [2022-01-18 15:51:58,548 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) [2022-01-18 15:51:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 6546 states and 29146 transitions. [2022-01-18 15:51:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:51:58,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:58,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:58,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-01-18 15:51:58,775 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,SelfDestructingSolverStorable278 [2022-01-18 15:51:58,775 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:51:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:58,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1115619218, now seen corresponding path program 8 times [2022-01-18 15:51:58,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:58,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354641031] [2022-01-18 15:51:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:58,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:59,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:59,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354641031] [2022-01-18 15:51:59,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354641031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:59,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019568287] [2022-01-18 15:51:59,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:51:59,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:59,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:59,022 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) [2022-01-18 15:51:59,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-18 15:51:59,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:59,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:59,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:51:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:59,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:59,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:59,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:59,391 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 26 treesize of output 16 [2022-01-18 15:51:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:59,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:59,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:51:59,747 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:51:59,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:51:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:59,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019568287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:59,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:59,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 28 [2022-01-18 15:51:59,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396914172] [2022-01-18 15:51:59,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:59,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:51:59,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:59,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:51:59,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:51:59,826 INFO L87 Difference]: Start difference. First operand 6546 states and 29146 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) [2022-01-18 15:52:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:00,428 INFO L93 Difference]: Finished difference Result 6853 states and 30307 transitions. [2022-01-18 15:52:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:52:00,428 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 30 [2022-01-18 15:52:00,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:00,443 INFO L225 Difference]: With dead ends: 6853 [2022-01-18 15:52:00,443 INFO L226 Difference]: Without dead ends: 6796 [2022-01-18 15:52:00,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:52:00,444 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:00,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 138 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1424 Invalid, 0 Unknown, 463 Unchecked, 0.4s Time] [2022-01-18 15:52:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6796 states. [2022-01-18 15:52:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6796 to 6550. [2022-01-18 15:52:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6550 states, 6549 states have (on average 4.45258818140174) internal successors, (29160), 6549 states have internal predecessors, (29160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6550 states to 6550 states and 29160 transitions. [2022-01-18 15:52:00,551 INFO L78 Accepts]: Start accepts. Automaton has 6550 states and 29160 transitions. Word has length 30 [2022-01-18 15:52:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:00,551 INFO L470 AbstractCegarLoop]: Abstraction has 6550 states and 29160 transitions. [2022-01-18 15:52:00,552 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) [2022-01-18 15:52:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 6550 states and 29160 transitions. [2022-01-18 15:52:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:00,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:00,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:00,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:00,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-01-18 15:52:00,778 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:00,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:00,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1773444078, now seen corresponding path program 9 times [2022-01-18 15:52:00,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:00,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98560420] [2022-01-18 15:52:00,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:00,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:00,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:00,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98560420] [2022-01-18 15:52:00,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98560420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:00,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993494630] [2022-01-18 15:52:00,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:52:00,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:00,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:00,959 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) [2022-01-18 15:52:00,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-18 15:52:00,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:52:00,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:00,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:52:00,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:01,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:01,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:01,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:01,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:01,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-01-18 15:52:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:01,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:01,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:01,555 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:52:01,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:52:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:01,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993494630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:01,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:01,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 15:52:01,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854118366] [2022-01-18 15:52:01,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:01,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:52:01,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:01,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:52:01,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:52:01,832 INFO L87 Difference]: Start difference. First operand 6550 states and 29160 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 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) [2022-01-18 15:52:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:02,777 INFO L93 Difference]: Finished difference Result 7016 states and 30966 transitions. [2022-01-18 15:52:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:52:02,777 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 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 30 [2022-01-18 15:52:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:02,793 INFO L225 Difference]: With dead ends: 7016 [2022-01-18 15:52:02,793 INFO L226 Difference]: Without dead ends: 7009 [2022-01-18 15:52:02,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:52:02,794 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 106 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:02,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 146 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1625 Invalid, 0 Unknown, 495 Unchecked, 0.6s Time] [2022-01-18 15:52:02,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7009 states. [2022-01-18 15:52:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7009 to 6637. [2022-01-18 15:52:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6637 states, 6636 states have (on average 4.4451476793248945) internal successors, (29498), 6636 states have internal predecessors, (29498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6637 states to 6637 states and 29498 transitions. [2022-01-18 15:52:02,903 INFO L78 Accepts]: Start accepts. Automaton has 6637 states and 29498 transitions. Word has length 30 [2022-01-18 15:52:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:02,903 INFO L470 AbstractCegarLoop]: Abstraction has 6637 states and 29498 transitions. [2022-01-18 15:52:02,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 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) [2022-01-18 15:52:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 6637 states and 29498 transitions. [2022-01-18 15:52:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:02,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:02,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:02,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:03,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:03,130 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:03,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1744814927, now seen corresponding path program 1 times [2022-01-18 15:52:03,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:03,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209251295] [2022-01-18 15:52:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:03,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:03,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:03,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209251295] [2022-01-18 15:52:03,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209251295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:03,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974057155] [2022-01-18 15:52:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:03,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:03,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:03,371 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) [2022-01-18 15:52:03,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-18 15:52:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:52:03,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:03,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:03,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:03,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:03,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 15:52:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:03,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:03,977 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:03,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:52:04,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:04,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:04,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:04,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:04,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:52:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:04,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974057155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:04,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:04,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:52:04,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976116913] [2022-01-18 15:52:04,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:04,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:52:04,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:04,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:52:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:52:04,062 INFO L87 Difference]: Start difference. First operand 6637 states and 29498 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 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) [2022-01-18 15:52:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:05,311 INFO L93 Difference]: Finished difference Result 7275 states and 31943 transitions. [2022-01-18 15:52:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:52:05,311 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 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 30 [2022-01-18 15:52:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:05,327 INFO L225 Difference]: With dead ends: 7275 [2022-01-18 15:52:05,327 INFO L226 Difference]: Without dead ends: 7166 [2022-01-18 15:52:05,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:52:05,328 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 194 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:05,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 155 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2062 Invalid, 0 Unknown, 278 Unchecked, 0.8s Time] [2022-01-18 15:52:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7166 states. [2022-01-18 15:52:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7166 to 6623. [2022-01-18 15:52:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6623 states, 6622 states have (on average 4.445484747810329) internal successors, (29438), 6622 states have internal predecessors, (29438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6623 states to 6623 states and 29438 transitions. [2022-01-18 15:52:05,446 INFO L78 Accepts]: Start accepts. Automaton has 6623 states and 29438 transitions. Word has length 30 [2022-01-18 15:52:05,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:05,446 INFO L470 AbstractCegarLoop]: Abstraction has 6623 states and 29438 transitions. [2022-01-18 15:52:05,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 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) [2022-01-18 15:52:05,446 INFO L276 IsEmpty]: Start isEmpty. Operand 6623 states and 29438 transitions. [2022-01-18 15:52:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:05,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:05,458 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:05,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:05,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-01-18 15:52:05,660 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:05,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1885056364, now seen corresponding path program 10 times [2022-01-18 15:52:05,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:05,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024465265] [2022-01-18 15:52:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:05,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:05,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:05,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024465265] [2022-01-18 15:52:05,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024465265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:05,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559226828] [2022-01-18 15:52:05,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:52:05,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:05,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:05,876 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) [2022-01-18 15:52:05,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-18 15:52:05,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:52:05,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:05,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:52:05,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:06,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:06,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:06,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:06,114 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 30 treesize of output 16 [2022-01-18 15:52:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:06,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:06,380 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:06,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:52:06,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:06,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:06,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:06,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:06,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:52:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:06,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559226828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:06,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:06,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:52:06,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833281713] [2022-01-18 15:52:06,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:06,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:52:06,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:52:06,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:52:06,430 INFO L87 Difference]: Start difference. First operand 6623 states and 29438 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 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) [2022-01-18 15:52:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:07,423 INFO L93 Difference]: Finished difference Result 7133 states and 31431 transitions. [2022-01-18 15:52:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:52:07,424 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 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 30 [2022-01-18 15:52:07,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:07,441 INFO L225 Difference]: With dead ends: 7133 [2022-01-18 15:52:07,441 INFO L226 Difference]: Without dead ends: 7069 [2022-01-18 15:52:07,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:52:07,441 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 189 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:07,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 148 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1889 Invalid, 0 Unknown, 405 Unchecked, 0.7s Time] [2022-01-18 15:52:07,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7069 states. [2022-01-18 15:52:07,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7069 to 6621. [2022-01-18 15:52:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6621 states, 6620 states have (on average 4.445619335347432) internal successors, (29430), 6620 states have internal predecessors, (29430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6621 states to 6621 states and 29430 transitions. [2022-01-18 15:52:07,553 INFO L78 Accepts]: Start accepts. Automaton has 6621 states and 29430 transitions. Word has length 30 [2022-01-18 15:52:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:07,553 INFO L470 AbstractCegarLoop]: Abstraction has 6621 states and 29430 transitions. [2022-01-18 15:52:07,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 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) [2022-01-18 15:52:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 6621 states and 29430 transitions. [2022-01-18 15:52:07,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:07,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:07,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:07,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:07,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-01-18 15:52:07,767 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:07,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1526599829, now seen corresponding path program 4 times [2022-01-18 15:52:07,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:07,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352705156] [2022-01-18 15:52:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:07,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:07,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:07,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352705156] [2022-01-18 15:52:07,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352705156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:07,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79364184] [2022-01-18 15:52:07,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:52:07,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:07,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:07,969 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) [2022-01-18 15:52:07,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-18 15:52:07,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:52:07,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:07,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:52:07,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:08,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:08,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:08,307 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 33 treesize of output 17 [2022-01-18 15:52:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:08,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:08,572 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:08,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:52:08,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:08,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:08,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:08,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:08,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:52:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:08,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79364184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:08,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:08,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:52:08,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631833854] [2022-01-18 15:52:08,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:08,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:52:08,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:52:08,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:52:08,627 INFO L87 Difference]: Start difference. First operand 6621 states and 29430 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:52:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:09,383 INFO L93 Difference]: Finished difference Result 7087 states and 31261 transitions. [2022-01-18 15:52:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:52:09,383 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 30 [2022-01-18 15:52:09,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:09,407 INFO L225 Difference]: With dead ends: 7087 [2022-01-18 15:52:09,407 INFO L226 Difference]: Without dead ends: 7030 [2022-01-18 15:52:09,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:52:09,407 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:09,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 108 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1228 Invalid, 0 Unknown, 286 Unchecked, 0.4s Time] [2022-01-18 15:52:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2022-01-18 15:52:09,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 6627. [2022-01-18 15:52:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 6626 states have (on average 4.445819498943556) internal successors, (29458), 6626 states have internal predecessors, (29458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 29458 transitions. [2022-01-18 15:52:09,610 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 29458 transitions. Word has length 30 [2022-01-18 15:52:09,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:09,610 INFO L470 AbstractCegarLoop]: Abstraction has 6627 states and 29458 transitions. [2022-01-18 15:52:09,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:52:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 29458 transitions. [2022-01-18 15:52:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:09,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:09,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:09,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:09,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:09,825 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:09,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1308248243, now seen corresponding path program 5 times [2022-01-18 15:52:09,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:09,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431313484] [2022-01-18 15:52:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:09,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:09,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431313484] [2022-01-18 15:52:09,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431313484] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144240791] [2022-01-18 15:52:09,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:52:09,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:09,989 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) [2022-01-18 15:52:09,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-18 15:52:10,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:52:10,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:10,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 15:52:10,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:10,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:10,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:10,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:10,326 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 26 treesize of output 52 [2022-01-18 15:52:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:10,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:10,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:10,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:10,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:10,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-18 15:52:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:10,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144240791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:10,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:10,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-18 15:52:10,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859768491] [2022-01-18 15:52:10,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:10,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:52:10,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:52:10,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:52:10,884 INFO L87 Difference]: Start difference. First operand 6627 states and 29458 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:13,717 INFO L93 Difference]: Finished difference Result 8074 states and 34997 transitions. [2022-01-18 15:52:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 15:52:13,718 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:13,737 INFO L225 Difference]: With dead ends: 8074 [2022-01-18 15:52:13,737 INFO L226 Difference]: Without dead ends: 7929 [2022-01-18 15:52:13,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=720, Invalid=7112, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 15:52:13,738 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 622 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 3600 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 6268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2457 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:13,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 391 Invalid, 6268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3600 Invalid, 0 Unknown, 2457 Unchecked, 1.2s Time] [2022-01-18 15:52:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7929 states. [2022-01-18 15:52:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7929 to 6650. [2022-01-18 15:52:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6650 states, 6649 states have (on average 4.449240487291322) internal successors, (29583), 6649 states have internal predecessors, (29583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6650 states to 6650 states and 29583 transitions. [2022-01-18 15:52:13,903 INFO L78 Accepts]: Start accepts. Automaton has 6650 states and 29583 transitions. Word has length 30 [2022-01-18 15:52:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:13,903 INFO L470 AbstractCegarLoop]: Abstraction has 6650 states and 29583 transitions. [2022-01-18 15:52:13,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:13,903 INFO L276 IsEmpty]: Start isEmpty. Operand 6650 states and 29583 transitions. [2022-01-18 15:52:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:13,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:13,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:13,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:14,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:14,122 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash -49840526, now seen corresponding path program 11 times [2022-01-18 15:52:14,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:14,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061370292] [2022-01-18 15:52:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:14,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:14,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:14,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061370292] [2022-01-18 15:52:14,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061370292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:14,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532479933] [2022-01-18 15:52:14,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:52:14,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:14,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:14,324 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) [2022-01-18 15:52:14,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-18 15:52:14,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:14,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:14,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:52:14,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:14,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:14,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:14,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:14,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:52:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:14,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:14,862 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:14,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:52:14,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:14,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:14,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:14,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:14,914 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 25 treesize of output 3 [2022-01-18 15:52:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:14,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532479933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:14,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:14,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:52:14,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898617963] [2022-01-18 15:52:14,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:14,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:52:14,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:52:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:52:14,929 INFO L87 Difference]: Start difference. First operand 6650 states and 29583 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:16,049 INFO L93 Difference]: Finished difference Result 7400 states and 32601 transitions. [2022-01-18 15:52:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:52:16,049 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:16,073 INFO L225 Difference]: With dead ends: 7400 [2022-01-18 15:52:16,073 INFO L226 Difference]: Without dead ends: 7336 [2022-01-18 15:52:16,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:52:16,073 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 252 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 2256 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:16,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 184 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2256 Invalid, 0 Unknown, 597 Unchecked, 0.7s Time] [2022-01-18 15:52:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2022-01-18 15:52:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 6670. [2022-01-18 15:52:16,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6670 states, 6669 states have (on average 4.448642974958765) internal successors, (29668), 6669 states have internal predecessors, (29668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 29668 transitions. [2022-01-18 15:52:16,206 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 29668 transitions. Word has length 30 [2022-01-18 15:52:16,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:16,206 INFO L470 AbstractCegarLoop]: Abstraction has 6670 states and 29668 transitions. [2022-01-18 15:52:16,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 29668 transitions. [2022-01-18 15:52:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:16,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:16,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:16,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:16,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:16,441 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:16,442 INFO L85 PathProgramCache]: Analyzing trace with hash -47065870, now seen corresponding path program 12 times [2022-01-18 15:52:16,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:16,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043933123] [2022-01-18 15:52:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:16,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:16,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:16,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043933123] [2022-01-18 15:52:16,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043933123] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:16,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652761118] [2022-01-18 15:52:16,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:52:16,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:16,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:16,636 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) [2022-01-18 15:52:16,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-18 15:52:16,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:52:16,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:16,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 15:52:16,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:17,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:17,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:17,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:17,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:17,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2022-01-18 15:52:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:17,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:17,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:17,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:17,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:17,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:17,851 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2022-01-18 15:52:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:17,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652761118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:17,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:17,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:52:17,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138899141] [2022-01-18 15:52:17,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:17,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:52:17,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:52:17,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:52:17,876 INFO L87 Difference]: Start difference. First operand 6670 states and 29668 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:20,018 INFO L93 Difference]: Finished difference Result 9582 states and 40553 transitions. [2022-01-18 15:52:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 15:52:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:20,043 INFO L225 Difference]: With dead ends: 9582 [2022-01-18 15:52:20,043 INFO L226 Difference]: Without dead ends: 9517 [2022-01-18 15:52:20,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 42 SyntacticMatches, 16 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=556, Invalid=3866, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 15:52:20,044 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 501 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1547 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:20,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 246 Invalid, 3238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1555 Invalid, 0 Unknown, 1547 Unchecked, 0.7s Time] [2022-01-18 15:52:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9517 states. [2022-01-18 15:52:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9517 to 6672. [2022-01-18 15:52:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6672 states, 6671 states have (on average 4.448208664368161) internal successors, (29674), 6671 states have internal predecessors, (29674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6672 states to 6672 states and 29674 transitions. [2022-01-18 15:52:20,209 INFO L78 Accepts]: Start accepts. Automaton has 6672 states and 29674 transitions. Word has length 30 [2022-01-18 15:52:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:20,210 INFO L470 AbstractCegarLoop]: Abstraction has 6672 states and 29674 transitions. [2022-01-18 15:52:20,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 6672 states and 29674 transitions. [2022-01-18 15:52:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:20,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:20,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:20,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-01-18 15:52:20,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:20,428 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:20,428 INFO L85 PathProgramCache]: Analyzing trace with hash -553412136, now seen corresponding path program 13 times [2022-01-18 15:52:20,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:20,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554314786] [2022-01-18 15:52:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:20,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:20,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:20,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554314786] [2022-01-18 15:52:20,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554314786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:20,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274377139] [2022-01-18 15:52:20,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:52:20,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:20,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:20,618 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) [2022-01-18 15:52:20,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-18 15:52:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:20,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:52:20,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:21,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:21,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:21,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:21,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:52:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:21,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:21,342 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:21,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:52:21,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:21,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:21,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:21,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:21,434 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 25 treesize of output 3 [2022-01-18 15:52:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:21,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274377139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:21,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:21,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:52:21,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521238658] [2022-01-18 15:52:21,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:21,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:52:21,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:52:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:52:21,453 INFO L87 Difference]: Start difference. First operand 6672 states and 29674 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:22,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:22,204 INFO L93 Difference]: Finished difference Result 7206 states and 31772 transitions. [2022-01-18 15:52:22,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:52:22,204 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:22,223 INFO L225 Difference]: With dead ends: 7206 [2022-01-18 15:52:22,223 INFO L226 Difference]: Without dead ends: 7147 [2022-01-18 15:52:22,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:52:22,224 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 183 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:22,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 146 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1464 Invalid, 0 Unknown, 374 Unchecked, 0.5s Time] [2022-01-18 15:52:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7147 states. [2022-01-18 15:52:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7147 to 6695. [2022-01-18 15:52:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 4.4462204959665375) internal successors, (29763), 6694 states have internal predecessors, (29763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 29763 transitions. [2022-01-18 15:52:22,436 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 29763 transitions. Word has length 30 [2022-01-18 15:52:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:22,436 INFO L470 AbstractCegarLoop]: Abstraction has 6695 states and 29763 transitions. [2022-01-18 15:52:22,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 29763 transitions. [2022-01-18 15:52:22,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:22,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:22,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:22,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-01-18 15:52:22,663 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,SelfDestructingSolverStorable287 [2022-01-18 15:52:22,663 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash 700507388, now seen corresponding path program 14 times [2022-01-18 15:52:22,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:22,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404916850] [2022-01-18 15:52:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:22,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:22,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:22,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404916850] [2022-01-18 15:52:22,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404916850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:22,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435115948] [2022-01-18 15:52:22,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:52:22,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:22,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:22,866 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) [2022-01-18 15:52:22,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-18 15:52:22,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:22,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:22,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 15:52:22,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:23,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:23,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:23,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:23,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:23,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-01-18 15:52:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:23,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:23,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:23,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:23,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:23,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:23,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 7 [2022-01-18 15:52:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:23,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435115948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:23,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:23,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 30 [2022-01-18 15:52:23,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202715816] [2022-01-18 15:52:23,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:23,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:52:23,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:23,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:52:23,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:52:23,984 INFO L87 Difference]: Start difference. First operand 6695 states and 29763 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:26,000 INFO L93 Difference]: Finished difference Result 9226 states and 39321 transitions. [2022-01-18 15:52:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:52:26,001 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:26,025 INFO L225 Difference]: With dead ends: 9226 [2022-01-18 15:52:26,025 INFO L226 Difference]: Without dead ends: 9219 [2022-01-18 15:52:26,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=428, Invalid=3354, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 15:52:26,026 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 459 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 4528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2192 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:26,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 288 Invalid, 4528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2225 Invalid, 0 Unknown, 2192 Unchecked, 0.9s Time] [2022-01-18 15:52:26,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2022-01-18 15:52:26,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 6763. [2022-01-18 15:52:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 4.440402247855664) internal successors, (30026), 6762 states have internal predecessors, (30026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 30026 transitions. [2022-01-18 15:52:26,178 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 30026 transitions. Word has length 30 [2022-01-18 15:52:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:26,178 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 30026 transitions. [2022-01-18 15:52:26,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 30026 transitions. [2022-01-18 15:52:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:26,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:26,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:26,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-01-18 15:52:26,435 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,SelfDestructingSolverStorable288 [2022-01-18 15:52:26,435 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:26,436 INFO L85 PathProgramCache]: Analyzing trace with hash 729136539, now seen corresponding path program 2 times [2022-01-18 15:52:26,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:26,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105497701] [2022-01-18 15:52:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:26,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:26,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105497701] [2022-01-18 15:52:26,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105497701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:26,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498040058] [2022-01-18 15:52:26,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:52:26,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:26,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:26,635 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) [2022-01-18 15:52:26,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-18 15:52:26,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:26,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:26,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 15:52:26,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:26,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:26,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:26,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:26,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:26,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-01-18 15:52:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:27,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:27,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:27,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:27,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:27,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:27,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 7 [2022-01-18 15:52:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:27,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498040058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:27,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:27,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 30 [2022-01-18 15:52:27,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784342667] [2022-01-18 15:52:27,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:27,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:52:27,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:27,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:52:27,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:52:27,849 INFO L87 Difference]: Start difference. First operand 6763 states and 30026 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:29,808 INFO L93 Difference]: Finished difference Result 9940 states and 41778 transitions. [2022-01-18 15:52:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 15:52:29,808 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:29,834 INFO L225 Difference]: With dead ends: 9940 [2022-01-18 15:52:29,834 INFO L226 Difference]: Without dead ends: 9863 [2022-01-18 15:52:29,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=458, Invalid=3832, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:52:29,835 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 389 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 3888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1552 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:29,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 341 Invalid, 3888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2218 Invalid, 0 Unknown, 1552 Unchecked, 0.8s Time] [2022-01-18 15:52:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9863 states. [2022-01-18 15:52:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9863 to 6837. [2022-01-18 15:52:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6837 states, 6836 states have (on average 4.434318314803979) internal successors, (30313), 6836 states have internal predecessors, (30313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6837 states to 6837 states and 30313 transitions. [2022-01-18 15:52:29,993 INFO L78 Accepts]: Start accepts. Automaton has 6837 states and 30313 transitions. Word has length 30 [2022-01-18 15:52:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:29,993 INFO L470 AbstractCegarLoop]: Abstraction has 6837 states and 30313 transitions. [2022-01-18 15:52:29,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 6837 states and 30313 transitions. [2022-01-18 15:52:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:30,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:30,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:30,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:30,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-01-18 15:52:30,223 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:30,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1418839188, now seen corresponding path program 15 times [2022-01-18 15:52:30,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:30,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106612996] [2022-01-18 15:52:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:30,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:30,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:30,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106612996] [2022-01-18 15:52:30,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106612996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:30,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124333386] [2022-01-18 15:52:30,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:52:30,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:30,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:30,551 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) [2022-01-18 15:52:30,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-18 15:52:30,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:52:30,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:30,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:52:30,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:30,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:30,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:30,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:30,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:30,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:52:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:31,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:31,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:31,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:31,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:31,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:31,731 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 47 treesize of output 7 [2022-01-18 15:52:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:31,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124333386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:31,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:31,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:52:31,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115050266] [2022-01-18 15:52:31,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:31,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:52:31,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:52:31,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:52:31,781 INFO L87 Difference]: Start difference. First operand 6837 states and 30313 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:34,514 INFO L93 Difference]: Finished difference Result 9210 states and 39202 transitions. [2022-01-18 15:52:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:52:34,514 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:34,538 INFO L225 Difference]: With dead ends: 9210 [2022-01-18 15:52:34,539 INFO L226 Difference]: Without dead ends: 9047 [2022-01-18 15:52:34,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=477, Invalid=3683, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 15:52:34,539 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 461 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:34,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 283 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2215 Invalid, 0 Unknown, 963 Unchecked, 1.1s Time] [2022-01-18 15:52:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2022-01-18 15:52:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 6836. [2022-01-18 15:52:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 4.437454279444038) internal successors, (30330), 6835 states have internal predecessors, (30330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 30330 transitions. [2022-01-18 15:52:34,686 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 30330 transitions. Word has length 30 [2022-01-18 15:52:34,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:34,686 INFO L470 AbstractCegarLoop]: Abstraction has 6836 states and 30330 transitions. [2022-01-18 15:52:34,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:34,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 30330 transitions. [2022-01-18 15:52:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:34,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:34,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:34,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:34,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:34,913 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1548292298, now seen corresponding path program 16 times [2022-01-18 15:52:34,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:34,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068098870] [2022-01-18 15:52:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:34,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:35,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:35,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068098870] [2022-01-18 15:52:35,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068098870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:35,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925075215] [2022-01-18 15:52:35,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:52:35,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:35,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:35,099 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) [2022-01-18 15:52:35,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-18 15:52:35,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:52:35,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:52:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:35,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:52:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:35,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:35,504 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:35,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:52:35,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:35,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:35,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:52:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:35,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925075215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:35,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:35,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 15:52:35,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098896768] [2022-01-18 15:52:35,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:35,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:52:35,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:52:35,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:52:35,581 INFO L87 Difference]: Start difference. First operand 6836 states and 30330 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:38,017 INFO L93 Difference]: Finished difference Result 8188 states and 35836 transitions. [2022-01-18 15:52:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:52:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:38,037 INFO L225 Difference]: With dead ends: 8188 [2022-01-18 15:52:38,037 INFO L226 Difference]: Without dead ends: 8115 [2022-01-18 15:52:38,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=438, Invalid=2984, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 15:52:38,038 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 354 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 3014 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 3014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:38,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 141 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 3014 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 15:52:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8115 states. [2022-01-18 15:52:38,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8115 to 6854. [2022-01-18 15:52:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6854 states, 6853 states have (on average 4.437764482708303) internal successors, (30412), 6853 states have internal predecessors, (30412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6854 states to 6854 states and 30412 transitions. [2022-01-18 15:52:38,159 INFO L78 Accepts]: Start accepts. Automaton has 6854 states and 30412 transitions. Word has length 30 [2022-01-18 15:52:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:38,159 INFO L470 AbstractCegarLoop]: Abstraction has 6854 states and 30412 transitions. [2022-01-18 15:52:38,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 6854 states and 30412 transitions. [2022-01-18 15:52:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:38,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:38,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:38,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-01-18 15:52:38,374 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,SelfDestructingSolverStorable291 [2022-01-18 15:52:38,375 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:38,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:38,375 INFO L85 PathProgramCache]: Analyzing trace with hash -839631548, now seen corresponding path program 17 times [2022-01-18 15:52:38,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:38,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624840432] [2022-01-18 15:52:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:38,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:38,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:38,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624840432] [2022-01-18 15:52:38,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624840432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:38,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845377787] [2022-01-18 15:52:38,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:52:38,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:38,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:38,547 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) [2022-01-18 15:52:38,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-18 15:52:38,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:38,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:38,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:52:38,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:38,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:52:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:38,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:39,029 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:39,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:52:39,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:39,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:39,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:52:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:39,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845377787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:39,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:39,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:52:39,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076615434] [2022-01-18 15:52:39,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:39,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:52:39,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:39,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:52:39,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:52:39,127 INFO L87 Difference]: Start difference. First operand 6854 states and 30412 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:41,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:41,135 INFO L93 Difference]: Finished difference Result 8038 states and 35238 transitions. [2022-01-18 15:52:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:52:41,135 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:41,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:41,161 INFO L225 Difference]: With dead ends: 8038 [2022-01-18 15:52:41,162 INFO L226 Difference]: Without dead ends: 7963 [2022-01-18 15:52:41,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=359, Invalid=2503, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:52:41,162 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 289 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 3190 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 3190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:41,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 148 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 3190 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 15:52:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7963 states. [2022-01-18 15:52:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7963 to 6849. [2022-01-18 15:52:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6849 states, 6848 states have (on average 4.4375) internal successors, (30388), 6848 states have internal predecessors, (30388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6849 states to 6849 states and 30388 transitions. [2022-01-18 15:52:41,342 INFO L78 Accepts]: Start accepts. Automaton has 6849 states and 30388 transitions. Word has length 30 [2022-01-18 15:52:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:41,342 INFO L470 AbstractCegarLoop]: Abstraction has 6849 states and 30388 transitions. [2022-01-18 15:52:41,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 6849 states and 30388 transitions. [2022-01-18 15:52:41,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:41,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:41,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:41,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:41,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:41,571 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash 49864555, now seen corresponding path program 1 times [2022-01-18 15:52:41,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:41,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164949357] [2022-01-18 15:52:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:41,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:41,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:41,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164949357] [2022-01-18 15:52:41,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164949357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:41,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724470223] [2022-01-18 15:52:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:41,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:41,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:41,733 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) [2022-01-18 15:52:41,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-18 15:52:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:41,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:52:41,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:41,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 15:52:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:42,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:42,270 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:52:42,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:52:42,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:42,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:42,320 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 25 treesize of output 3 [2022-01-18 15:52:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:42,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724470223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:42,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:42,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 15:52:42,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59105853] [2022-01-18 15:52:42,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:42,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:52:42,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:42,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:52:42,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:52:42,348 INFO L87 Difference]: Start difference. First operand 6849 states and 30388 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:45,449 INFO L93 Difference]: Finished difference Result 9316 states and 40032 transitions. [2022-01-18 15:52:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:52:45,449 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:45,475 INFO L225 Difference]: With dead ends: 9316 [2022-01-18 15:52:45,476 INFO L226 Difference]: Without dead ends: 9153 [2022-01-18 15:52:45,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=544, Invalid=3878, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 15:52:45,476 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 541 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 3765 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 3999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 3765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:45,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 254 Invalid, 3999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 3765 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 15:52:45,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9153 states. [2022-01-18 15:52:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9153 to 6912. [2022-01-18 15:52:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6912 states, 6911 states have (on average 4.441470120098394) internal successors, (30695), 6911 states have internal predecessors, (30695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6912 states to 6912 states and 30695 transitions. [2022-01-18 15:52:45,629 INFO L78 Accepts]: Start accepts. Automaton has 6912 states and 30695 transitions. Word has length 30 [2022-01-18 15:52:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:45,629 INFO L470 AbstractCegarLoop]: Abstraction has 6912 states and 30695 transitions. [2022-01-18 15:52:45,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6912 states and 30695 transitions. [2022-01-18 15:52:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:45,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:45,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:45,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:45,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:45,848 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash 458193003, now seen corresponding path program 2 times [2022-01-18 15:52:45,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:45,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029995182] [2022-01-18 15:52:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:45,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:46,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:46,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029995182] [2022-01-18 15:52:46,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029995182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471648547] [2022-01-18 15:52:46,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:52:46,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:46,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:46,103 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) [2022-01-18 15:52:46,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-18 15:52:46,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:46,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:46,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:52:46,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:46,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:46,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:46,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:52:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:46,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:46,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:46,768 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:52:46,769 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 47 treesize of output 58 [2022-01-18 15:52:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:46,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471648547] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:46,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:46,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-01-18 15:52:46,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333977414] [2022-01-18 15:52:46,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:46,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:52:46,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:52:46,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:52:46,930 INFO L87 Difference]: Start difference. First operand 6912 states and 30695 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:48,863 INFO L93 Difference]: Finished difference Result 8588 states and 37518 transitions. [2022-01-18 15:52:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:52:48,864 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:48,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:48,886 INFO L225 Difference]: With dead ends: 8588 [2022-01-18 15:52:48,886 INFO L226 Difference]: Without dead ends: 8527 [2022-01-18 15:52:48,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=343, Invalid=2737, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 15:52:48,886 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 272 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 3232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 710 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:48,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 153 Invalid, 3232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2381 Invalid, 0 Unknown, 710 Unchecked, 1.0s Time] [2022-01-18 15:52:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2022-01-18 15:52:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 7015. [2022-01-18 15:52:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7015 states, 7014 states have (on average 4.439549472483605) internal successors, (31139), 7014 states have internal predecessors, (31139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7015 states to 7015 states and 31139 transitions. [2022-01-18 15:52:49,026 INFO L78 Accepts]: Start accepts. Automaton has 7015 states and 31139 transitions. Word has length 30 [2022-01-18 15:52:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:49,026 INFO L470 AbstractCegarLoop]: Abstraction has 7015 states and 31139 transitions. [2022-01-18 15:52:49,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:49,026 INFO L276 IsEmpty]: Start isEmpty. Operand 7015 states and 31139 transitions. [2022-01-18 15:52:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:49,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:49,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:49,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-01-18 15:52:49,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:49,247 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:49,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1201188978, now seen corresponding path program 18 times [2022-01-18 15:52:49,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:49,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569147478] [2022-01-18 15:52:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:49,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:49,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:49,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569147478] [2022-01-18 15:52:49,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569147478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:49,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268278438] [2022-01-18 15:52:49,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:52:49,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:49,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:49,425 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) [2022-01-18 15:52:49,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-18 15:52:49,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:52:49,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:49,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:52:49,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:49,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:49,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:49,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:49,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:49,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2022-01-18 15:52:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:49,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:50,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:50,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:50,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:50,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:52:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:50,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268278438] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:50,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:50,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 31 [2022-01-18 15:52:50,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414949345] [2022-01-18 15:52:50,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:50,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:52:50,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:50,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:52:50,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:52:50,109 INFO L87 Difference]: Start difference. First operand 7015 states and 31139 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:54,113 INFO L93 Difference]: Finished difference Result 9654 states and 41269 transitions. [2022-01-18 15:52:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 15:52:54,114 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:52:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:54,139 INFO L225 Difference]: With dead ends: 9654 [2022-01-18 15:52:54,139 INFO L226 Difference]: Without dead ends: 9580 [2022-01-18 15:52:54,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=800, Invalid=5206, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 15:52:54,140 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 470 mSDsluCounter, 2339 mSDsCounter, 0 mSdLazyCounter, 2818 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 5515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2491 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:54,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 296 Invalid, 5515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2818 Invalid, 0 Unknown, 2491 Unchecked, 1.4s Time] [2022-01-18 15:52:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9580 states. [2022-01-18 15:52:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9580 to 7047. [2022-01-18 15:52:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7046 states have (on average 4.436417825716719) internal successors, (31259), 7046 states have internal predecessors, (31259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 31259 transitions. [2022-01-18 15:52:54,309 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 31259 transitions. Word has length 30 [2022-01-18 15:52:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:54,309 INFO L470 AbstractCegarLoop]: Abstraction has 7047 states and 31259 transitions. [2022-01-18 15:52:54,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:54,310 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 31259 transitions. [2022-01-18 15:52:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:52:54,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:54,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:54,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:54,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:54,538 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:52:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:54,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1517337963, now seen corresponding path program 3 times [2022-01-18 15:52:54,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:54,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344855148] [2022-01-18 15:52:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:54,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:54,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:54,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344855148] [2022-01-18 15:52:54,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344855148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:54,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943557719] [2022-01-18 15:52:54,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:52:54,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:54,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:54,820 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) [2022-01-18 15:52:54,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-18 15:52:54,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:52:54,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:54,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:52:54,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:55,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:55,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-01-18 15:52:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:55,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:55,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:55,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:52:55,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:55,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-01-18 15:52:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:55,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943557719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:55,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:55,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-01-18 15:52:55,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898686815] [2022-01-18 15:52:55,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:55,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:52:55,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:55,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:52:55,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:52:55,880 INFO L87 Difference]: Start difference. First operand 7047 states and 31259 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:01,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:01,707 INFO L93 Difference]: Finished difference Result 13701 states and 57319 transitions. [2022-01-18 15:53:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-18 15:53:01,707 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:01,750 INFO L225 Difference]: With dead ends: 13701 [2022-01-18 15:53:01,751 INFO L226 Difference]: Without dead ends: 13517 [2022-01-18 15:53:01,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 50 SyntacticMatches, 12 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5191 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2162, Invalid=12358, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 15:53:01,752 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 927 mSDsluCounter, 3758 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 8128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5100 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:01,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 424 Invalid, 8128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 2646 Invalid, 0 Unknown, 5100 Unchecked, 1.6s Time] [2022-01-18 15:53:01,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13517 states. [2022-01-18 15:53:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13517 to 7661. [2022-01-18 15:53:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7661 states, 7660 states have (on average 4.45953002610966) internal successors, (34160), 7660 states have internal predecessors, (34160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7661 states to 7661 states and 34160 transitions. [2022-01-18 15:53:02,017 INFO L78 Accepts]: Start accepts. Automaton has 7661 states and 34160 transitions. Word has length 30 [2022-01-18 15:53:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:02,017 INFO L470 AbstractCegarLoop]: Abstraction has 7661 states and 34160 transitions. [2022-01-18 15:53:02,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 7661 states and 34160 transitions. [2022-01-18 15:53:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:02,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:02,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:02,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-01-18 15:53:02,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:02,247 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash -469793688, now seen corresponding path program 19 times [2022-01-18 15:53:02,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429375788] [2022-01-18 15:53:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:02,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:02,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:02,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429375788] [2022-01-18 15:53:02,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429375788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:02,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219637641] [2022-01-18 15:53:02,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:53:02,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:02,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:02,473 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) [2022-01-18 15:53:02,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-18 15:53:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:02,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:53:02,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:02,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:53:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:02,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:02,947 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:02,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:53:03,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:03,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:03,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:03,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:03,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:53:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:03,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219637641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:03,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:03,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 15:53:03,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091829822] [2022-01-18 15:53:03,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:03,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:53:03,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:03,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:53:03,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:53:03,045 INFO L87 Difference]: Start difference. First operand 7661 states and 34160 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:05,180 INFO L93 Difference]: Finished difference Result 8948 states and 39411 transitions. [2022-01-18 15:53:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:53:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:05,205 INFO L225 Difference]: With dead ends: 8948 [2022-01-18 15:53:05,205 INFO L226 Difference]: Without dead ends: 8875 [2022-01-18 15:53:05,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=293, Invalid=1869, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 15:53:05,206 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 298 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 3013 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 3013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:05,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 158 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 3013 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 15:53:05,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8875 states. [2022-01-18 15:53:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8875 to 7699. [2022-01-18 15:53:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 7698 states have (on average 4.459859703819173) internal successors, (34332), 7698 states have internal predecessors, (34332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 34332 transitions. [2022-01-18 15:53:05,403 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 34332 transitions. Word has length 30 [2022-01-18 15:53:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:05,403 INFO L470 AbstractCegarLoop]: Abstraction has 7699 states and 34332 transitions. [2022-01-18 15:53:05,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 34332 transitions. [2022-01-18 15:53:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:05,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:05,418 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:05,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-01-18 15:53:05,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:05,622 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1437249762, now seen corresponding path program 20 times [2022-01-18 15:53:05,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:05,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778583570] [2022-01-18 15:53:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:05,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:05,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:05,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778583570] [2022-01-18 15:53:05,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778583570] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:05,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681776368] [2022-01-18 15:53:05,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:53:05,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:05,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:05,830 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:05,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-18 15:53:05,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:53:05,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:05,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:53:05,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:06,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:06,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:06,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:53:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:06,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:06,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:06,475 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:53:06,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:53:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:06,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681776368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:06,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:06,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-01-18 15:53:06,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115902030] [2022-01-18 15:53:06,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:06,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:53:06,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:06,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:53:06,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:53:06,574 INFO L87 Difference]: Start difference. First operand 7699 states and 34332 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:08,087 INFO L93 Difference]: Finished difference Result 8935 states and 39369 transitions. [2022-01-18 15:53:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:53:08,087 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:08,111 INFO L225 Difference]: With dead ends: 8935 [2022-01-18 15:53:08,111 INFO L226 Difference]: Without dead ends: 8860 [2022-01-18 15:53:08,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=271, Invalid=1985, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:53:08,112 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 275 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 2433 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:08,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 153 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2433 Invalid, 0 Unknown, 743 Unchecked, 0.8s Time] [2022-01-18 15:53:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8860 states. [2022-01-18 15:53:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8860 to 7694. [2022-01-18 15:53:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7694 states, 7693 states have (on average 4.459378655920967) internal successors, (34306), 7693 states have internal predecessors, (34306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7694 states to 7694 states and 34306 transitions. [2022-01-18 15:53:08,270 INFO L78 Accepts]: Start accepts. Automaton has 7694 states and 34306 transitions. Word has length 30 [2022-01-18 15:53:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:08,270 INFO L470 AbstractCegarLoop]: Abstraction has 7694 states and 34306 transitions. [2022-01-18 15:53:08,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7694 states and 34306 transitions. [2022-01-18 15:53:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:08,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:08,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:08,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-01-18 15:53:08,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-01-18 15:53:08,492 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1274570318, now seen corresponding path program 21 times [2022-01-18 15:53:08,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:08,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94404260] [2022-01-18 15:53:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:08,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:08,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:08,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94404260] [2022-01-18 15:53:08,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94404260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:08,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946818590] [2022-01-18 15:53:08,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:53:08,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:08,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:08,631 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:08,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-18 15:53:08,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:53:08,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:08,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:53:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:08,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:08,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-01-18 15:53:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:08,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:09,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:09,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:09,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:09,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-01-18 15:53:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:09,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946818590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:09,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:09,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-01-18 15:53:09,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702619686] [2022-01-18 15:53:09,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:09,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:53:09,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:53:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:53:09,385 INFO L87 Difference]: Start difference. First operand 7694 states and 34306 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:12,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:12,089 INFO L93 Difference]: Finished difference Result 10292 states and 44805 transitions. [2022-01-18 15:53:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 15:53:12,090 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:12,118 INFO L225 Difference]: With dead ends: 10292 [2022-01-18 15:53:12,118 INFO L226 Difference]: Without dead ends: 10203 [2022-01-18 15:53:12,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=669, Invalid=3753, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 15:53:12,120 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 478 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1360 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:12,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 181 Invalid, 3711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2138 Invalid, 0 Unknown, 1360 Unchecked, 0.9s Time] [2022-01-18 15:53:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10203 states. [2022-01-18 15:53:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10203 to 7798. [2022-01-18 15:53:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7798 states, 7797 states have (on average 4.464152879312556) internal successors, (34807), 7797 states have internal predecessors, (34807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7798 states to 7798 states and 34807 transitions. [2022-01-18 15:53:12,298 INFO L78 Accepts]: Start accepts. Automaton has 7798 states and 34807 transitions. Word has length 30 [2022-01-18 15:53:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:12,298 INFO L470 AbstractCegarLoop]: Abstraction has 7798 states and 34807 transitions. [2022-01-18 15:53:12,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7798 states and 34807 transitions. [2022-01-18 15:53:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:12,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:12,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:12,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:12,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-01-18 15:53:12,516 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1342785842, now seen corresponding path program 22 times [2022-01-18 15:53:12,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:12,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642577770] [2022-01-18 15:53:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:12,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:12,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:12,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642577770] [2022-01-18 15:53:12,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642577770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:12,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155480903] [2022-01-18 15:53:12,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:53:12,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:12,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:12,703 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:12,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-18 15:53:12,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:53:12,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:53:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:12,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:53:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:12,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:13,008 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:13,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:53:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:13,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155480903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:13,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:13,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:53:13,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305509460] [2022-01-18 15:53:13,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:13,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:53:13,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:53:13,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:53:13,099 INFO L87 Difference]: Start difference. First operand 7798 states and 34807 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:15,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:15,028 INFO L93 Difference]: Finished difference Result 9044 states and 39809 transitions. [2022-01-18 15:53:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:53:15,028 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:15,059 INFO L225 Difference]: With dead ends: 9044 [2022-01-18 15:53:15,059 INFO L226 Difference]: Without dead ends: 8985 [2022-01-18 15:53:15,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:53:15,060 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 318 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 2790 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:15,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 158 Invalid, 3149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2790 Invalid, 0 Unknown, 196 Unchecked, 1.1s Time] [2022-01-18 15:53:15,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8985 states. [2022-01-18 15:53:15,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8985 to 7798. [2022-01-18 15:53:15,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7798 states, 7797 states have (on average 4.464152879312556) internal successors, (34807), 7797 states have internal predecessors, (34807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7798 states to 7798 states and 34807 transitions. [2022-01-18 15:53:15,219 INFO L78 Accepts]: Start accepts. Automaton has 7798 states and 34807 transitions. Word has length 30 [2022-01-18 15:53:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:15,219 INFO L470 AbstractCegarLoop]: Abstraction has 7798 states and 34807 transitions. [2022-01-18 15:53:15,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7798 states and 34807 transitions. [2022-01-18 15:53:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:15,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:15,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:15,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:15,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-01-18 15:53:15,450 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:15,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1682898766, now seen corresponding path program 23 times [2022-01-18 15:53:15,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:15,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729063166] [2022-01-18 15:53:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:15,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:15,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:15,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729063166] [2022-01-18 15:53:15,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729063166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:15,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842543341] [2022-01-18 15:53:15,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:53:15,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:15,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:15,672 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:15,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-18 15:53:15,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:53:15,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:15,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 15:53:15,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:15,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:15,851 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 23 treesize of output 57 [2022-01-18 15:53:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:16,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:17,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:17,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:17,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:17,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:17,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 9 [2022-01-18 15:53:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:17,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842543341] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:17,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:17,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 33 [2022-01-18 15:53:17,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967038591] [2022-01-18 15:53:17,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:17,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:53:17,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:53:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:53:17,229 INFO L87 Difference]: Start difference. First operand 7798 states and 34807 transitions. Second operand has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:20,418 INFO L93 Difference]: Finished difference Result 10313 states and 44174 transitions. [2022-01-18 15:53:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:53:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:20,443 INFO L225 Difference]: With dead ends: 10313 [2022-01-18 15:53:20,443 INFO L226 Difference]: Without dead ends: 10209 [2022-01-18 15:53:20,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=594, Invalid=4236, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:53:20,444 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 460 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 957 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:20,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 225 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2522 Invalid, 0 Unknown, 957 Unchecked, 1.1s Time] [2022-01-18 15:53:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2022-01-18 15:53:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 7807. [2022-01-18 15:53:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7807 states, 7806 states have (on average 4.463105303612606) internal successors, (34839), 7806 states have internal predecessors, (34839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7807 states to 7807 states and 34839 transitions. [2022-01-18 15:53:20,595 INFO L78 Accepts]: Start accepts. Automaton has 7807 states and 34839 transitions. Word has length 30 [2022-01-18 15:53:20,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:20,595 INFO L470 AbstractCegarLoop]: Abstraction has 7807 states and 34839 transitions. [2022-01-18 15:53:20,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7807 states and 34839 transitions. [2022-01-18 15:53:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:20,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:20,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:20,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:20,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-01-18 15:53:20,815 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:20,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:20,816 INFO L85 PathProgramCache]: Analyzing trace with hash -230152816, now seen corresponding path program 24 times [2022-01-18 15:53:20,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:20,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474880501] [2022-01-18 15:53:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:20,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:20,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:20,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474880501] [2022-01-18 15:53:20,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474880501] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:20,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744821393] [2022-01-18 15:53:20,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:53:20,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:20,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:20,992 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:20,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-18 15:53:21,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:53:21,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:21,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:53:21,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:21,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:21,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:21,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:21,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2022-01-18 15:53:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:21,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:21,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:21,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:53:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:21,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744821393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:21,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:21,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 31 [2022-01-18 15:53:21,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990917079] [2022-01-18 15:53:21,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:21,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:53:21,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:21,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:53:21,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:53:21,858 INFO L87 Difference]: Start difference. First operand 7807 states and 34839 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:25,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:25,117 INFO L93 Difference]: Finished difference Result 10507 states and 44834 transitions. [2022-01-18 15:53:25,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 15:53:25,118 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:25,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:25,143 INFO L225 Difference]: With dead ends: 10507 [2022-01-18 15:53:25,143 INFO L226 Difference]: Without dead ends: 10332 [2022-01-18 15:53:25,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=752, Invalid=5254, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 15:53:25,144 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 643 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 2810 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 4229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1162 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:25,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 302 Invalid, 4229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2810 Invalid, 0 Unknown, 1162 Unchecked, 1.3s Time] [2022-01-18 15:53:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10332 states. [2022-01-18 15:53:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10332 to 7799. [2022-01-18 15:53:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7799 states, 7798 states have (on average 4.464349833290587) internal successors, (34813), 7798 states have internal predecessors, (34813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7799 states to 7799 states and 34813 transitions. [2022-01-18 15:53:25,300 INFO L78 Accepts]: Start accepts. Automaton has 7799 states and 34813 transitions. Word has length 30 [2022-01-18 15:53:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:25,300 INFO L470 AbstractCegarLoop]: Abstraction has 7799 states and 34813 transitions. [2022-01-18 15:53:25,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 7799 states and 34813 transitions. [2022-01-18 15:53:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:25,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:25,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:25,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:25,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:25,520 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1206164530, now seen corresponding path program 25 times [2022-01-18 15:53:25,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:25,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791523183] [2022-01-18 15:53:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:25,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:25,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:25,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791523183] [2022-01-18 15:53:25,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791523183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:25,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944787069] [2022-01-18 15:53:25,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:53:25,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:25,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:25,714 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:25,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-18 15:53:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:25,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:53:25,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:25,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:53:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:25,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:26,167 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:26,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:53:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:26,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944787069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:26,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:26,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:53:26,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093619052] [2022-01-18 15:53:26,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:26,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:53:26,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:26,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:53:26,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:53:26,260 INFO L87 Difference]: Start difference. First operand 7799 states and 34813 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:28,373 INFO L93 Difference]: Finished difference Result 9152 states and 40344 transitions. [2022-01-18 15:53:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:53:28,374 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:28,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:28,399 INFO L225 Difference]: With dead ends: 9152 [2022-01-18 15:53:28,399 INFO L226 Difference]: Without dead ends: 9145 [2022-01-18 15:53:28,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=327, Invalid=2123, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:53:28,400 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 277 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 2898 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:28,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 197 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2898 Invalid, 0 Unknown, 158 Unchecked, 1.1s Time] [2022-01-18 15:53:28,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2022-01-18 15:53:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 7833. [2022-01-18 15:53:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7833 states, 7832 states have (on average 4.4637385086823285) internal successors, (34960), 7832 states have internal predecessors, (34960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7833 states to 7833 states and 34960 transitions. [2022-01-18 15:53:28,577 INFO L78 Accepts]: Start accepts. Automaton has 7833 states and 34960 transitions. Word has length 30 [2022-01-18 15:53:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:28,577 INFO L470 AbstractCegarLoop]: Abstraction has 7833 states and 34960 transitions. [2022-01-18 15:53:28,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:28,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7833 states and 34960 transitions. [2022-01-18 15:53:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:28,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:28,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:28,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-01-18 15:53:28,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-01-18 15:53:28,799 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:28,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:28,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1177535379, now seen corresponding path program 3 times [2022-01-18 15:53:28,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:28,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343793942] [2022-01-18 15:53:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:28,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:28,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:28,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343793942] [2022-01-18 15:53:28,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343793942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:28,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962232028] [2022-01-18 15:53:28,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:53:28,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:28,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:28,942 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:28,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-18 15:53:28,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:53:28,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:28,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:53:28,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:29,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:29,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2022-01-18 15:53:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:29,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:29,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:29,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:29,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:29,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-01-18 15:53:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:29,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962232028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:29,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:29,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-01-18 15:53:29,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326672490] [2022-01-18 15:53:29,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:29,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:53:29,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:53:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:53:29,779 INFO L87 Difference]: Start difference. First operand 7833 states and 34960 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:34,926 INFO L93 Difference]: Finished difference Result 11038 states and 48335 transitions. [2022-01-18 15:53:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 15:53:34,926 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:34,952 INFO L225 Difference]: With dead ends: 11038 [2022-01-18 15:53:34,952 INFO L226 Difference]: Without dead ends: 10743 [2022-01-18 15:53:34,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2614 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1387, Invalid=6623, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 15:53:34,953 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 496 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 3983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1833 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:34,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 168 Invalid, 3983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1844 Invalid, 0 Unknown, 1833 Unchecked, 0.9s Time] [2022-01-18 15:53:34,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10743 states. [2022-01-18 15:53:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10743 to 8070. [2022-01-18 15:53:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8070 states, 8069 states have (on average 4.470690296195316) internal successors, (36074), 8069 states have internal predecessors, (36074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8070 states to 8070 states and 36074 transitions. [2022-01-18 15:53:35,110 INFO L78 Accepts]: Start accepts. Automaton has 8070 states and 36074 transitions. Word has length 30 [2022-01-18 15:53:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:35,110 INFO L470 AbstractCegarLoop]: Abstraction has 8070 states and 36074 transitions. [2022-01-18 15:53:35,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 8070 states and 36074 transitions. [2022-01-18 15:53:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:35,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:35,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:35,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-01-18 15:53:35,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-01-18 15:53:35,340 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1395886965, now seen corresponding path program 4 times [2022-01-18 15:53:35,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:35,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181889565] [2022-01-18 15:53:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:35,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:35,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:35,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181889565] [2022-01-18 15:53:35,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181889565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:35,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313653536] [2022-01-18 15:53:35,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:53:35,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:35,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:35,472 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:35,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-18 15:53:35,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:53:35,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:35,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:53:35,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:35,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-01-18 15:53:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:35,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:35,812 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:35,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-01-18 15:53:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:35,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313653536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:35,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:35,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:53:35,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575570005] [2022-01-18 15:53:35,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:35,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:53:35,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:35,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:53:35,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:53:35,864 INFO L87 Difference]: Start difference. First operand 8070 states and 36074 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:38,043 INFO L93 Difference]: Finished difference Result 9609 states and 42336 transitions. [2022-01-18 15:53:38,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:53:38,043 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:38,066 INFO L225 Difference]: With dead ends: 9609 [2022-01-18 15:53:38,066 INFO L226 Difference]: Without dead ends: 9508 [2022-01-18 15:53:38,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=387, Invalid=2369, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:53:38,066 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 384 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:38,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 155 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2801 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 15:53:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9508 states. [2022-01-18 15:53:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9508 to 7977. [2022-01-18 15:53:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 4.4721664994984955) internal successors, (35670), 7976 states have internal predecessors, (35670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 35670 transitions. [2022-01-18 15:53:38,212 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 35670 transitions. Word has length 30 [2022-01-18 15:53:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:38,212 INFO L470 AbstractCegarLoop]: Abstraction has 7977 states and 35670 transitions. [2022-01-18 15:53:38,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 35670 transitions. [2022-01-18 15:53:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:38,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:38,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:38,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:38,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-01-18 15:53:38,429 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:38,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1842631384, now seen corresponding path program 26 times [2022-01-18 15:53:38,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:38,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595754503] [2022-01-18 15:53:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:38,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:38,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:38,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595754503] [2022-01-18 15:53:38,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595754503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:38,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252043343] [2022-01-18 15:53:38,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:53:38,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:38,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:38,605 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:38,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-18 15:53:38,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:53:38,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:38,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:53:38,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:38,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:38,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:38,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 15:53:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:38,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:39,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:39,067 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:53:39,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 50 [2022-01-18 15:53:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:39,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252043343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:39,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:39,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-01-18 15:53:39,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699475708] [2022-01-18 15:53:39,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:39,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:53:39,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:53:39,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:53:39,210 INFO L87 Difference]: Start difference. First operand 7977 states and 35670 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:40,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:40,812 INFO L93 Difference]: Finished difference Result 9399 states and 41444 transitions. [2022-01-18 15:53:40,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:53:40,813 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:40,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:40,835 INFO L225 Difference]: With dead ends: 9399 [2022-01-18 15:53:40,835 INFO L226 Difference]: Without dead ends: 9335 [2022-01-18 15:53:40,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=363, Invalid=2393, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:53:40,836 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 364 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:40,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 146 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1929 Invalid, 0 Unknown, 554 Unchecked, 0.8s Time] [2022-01-18 15:53:40,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9335 states. [2022-01-18 15:53:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9335 to 7975. [2022-01-18 15:53:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7975 states, 7974 states have (on average 4.4722849260095305) internal successors, (35662), 7974 states have internal predecessors, (35662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7975 states to 7975 states and 35662 transitions. [2022-01-18 15:53:40,981 INFO L78 Accepts]: Start accepts. Automaton has 7975 states and 35662 transitions. Word has length 30 [2022-01-18 15:53:40,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:40,982 INFO L470 AbstractCegarLoop]: Abstraction has 7975 states and 35662 transitions. [2022-01-18 15:53:40,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:40,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7975 states and 35662 transitions. [2022-01-18 15:53:40,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:40,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:40,996 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:41,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-01-18 15:53:41,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:41,211 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:41,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:41,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1407707696, now seen corresponding path program 27 times [2022-01-18 15:53:41,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:41,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500324432] [2022-01-18 15:53:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:41,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:41,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:41,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500324432] [2022-01-18 15:53:41,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500324432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:41,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453672804] [2022-01-18 15:53:41,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:53:41,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:41,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:41,420 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:41,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-18 15:53:41,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:53:41,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:41,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:53:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:41,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:41,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-01-18 15:53:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:41,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:42,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:42,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:42,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:42,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-01-18 15:53:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:42,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453672804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:42,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:42,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-01-18 15:53:42,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898263876] [2022-01-18 15:53:42,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:42,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:53:42,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:53:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:53:42,399 INFO L87 Difference]: Start difference. First operand 7975 states and 35662 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:47,352 INFO L93 Difference]: Finished difference Result 10842 states and 47356 transitions. [2022-01-18 15:53:47,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 15:53:47,352 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:47,378 INFO L225 Difference]: With dead ends: 10842 [2022-01-18 15:53:47,378 INFO L226 Difference]: Without dead ends: 10700 [2022-01-18 15:53:47,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4332 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1507, Invalid=10483, Unknown=0, NotChecked=0, Total=11990 [2022-01-18 15:53:47,379 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 568 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 4547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2317 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:47,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 311 Invalid, 4547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2016 Invalid, 0 Unknown, 2317 Unchecked, 0.9s Time] [2022-01-18 15:53:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10700 states. [2022-01-18 15:53:47,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10700 to 8188. [2022-01-18 15:53:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8188 states, 8187 states have (on average 4.467204104067424) internal successors, (36573), 8187 states have internal predecessors, (36573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:47,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 36573 transitions. [2022-01-18 15:53:47,539 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 36573 transitions. Word has length 30 [2022-01-18 15:53:47,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:47,539 INFO L470 AbstractCegarLoop]: Abstraction has 8188 states and 36573 transitions. [2022-01-18 15:53:47,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:47,540 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 36573 transitions. [2022-01-18 15:53:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:47,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:47,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:47,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:47,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:47,769 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:47,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1910634753, now seen corresponding path program 1 times [2022-01-18 15:53:47,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:47,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121740518] [2022-01-18 15:53:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:47,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:47,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:47,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121740518] [2022-01-18 15:53:47,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121740518] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:47,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852592391] [2022-01-18 15:53:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:47,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:47,957 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:47,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-18 15:53:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:53:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:48,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 15:53:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:48,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:48,429 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:48,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:53:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:48,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852592391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:48,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:48,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:53:48,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561459378] [2022-01-18 15:53:48,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:48,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:53:48,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:53:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:53:48,508 INFO L87 Difference]: Start difference. First operand 8188 states and 36573 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:51,105 INFO L93 Difference]: Finished difference Result 10074 states and 44197 transitions. [2022-01-18 15:53:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:53:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:51,130 INFO L225 Difference]: With dead ends: 10074 [2022-01-18 15:53:51,130 INFO L226 Difference]: Without dead ends: 9877 [2022-01-18 15:53:51,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=422, Invalid=3000, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 15:53:51,131 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 436 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 4048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:51,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 202 Invalid, 4048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3833 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 15:53:51,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9877 states. [2022-01-18 15:53:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9877 to 8124. [2022-01-18 15:53:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 4.472362427674504) internal successors, (36329), 8123 states have internal predecessors, (36329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 36329 transitions. [2022-01-18 15:53:51,316 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 36329 transitions. Word has length 30 [2022-01-18 15:53:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:51,316 INFO L470 AbstractCegarLoop]: Abstraction has 8124 states and 36329 transitions. [2022-01-18 15:53:51,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 36329 transitions. [2022-01-18 15:53:51,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:51,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:51,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:51,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-01-18 15:53:51,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:51,532 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:51,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1310819245, now seen corresponding path program 4 times [2022-01-18 15:53:51,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:51,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285846218] [2022-01-18 15:53:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:51,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:51,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:51,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285846218] [2022-01-18 15:53:51,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285846218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:51,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154602002] [2022-01-18 15:53:51,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:53:51,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:51,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:51,683 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:51,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-18 15:53:51,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:53:51,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:51,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:53:51,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:51,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 15:53:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:51,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:52,017 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:52,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-01-18 15:53:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:52,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154602002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:52,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:52,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:53:52,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788802500] [2022-01-18 15:53:52,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:52,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:53:52,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:52,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:53:52,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:53:52,077 INFO L87 Difference]: Start difference. First operand 8124 states and 36329 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:54,849 INFO L93 Difference]: Finished difference Result 10693 states and 46833 transitions. [2022-01-18 15:53:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:53:54,849 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:54,875 INFO L225 Difference]: With dead ends: 10693 [2022-01-18 15:53:54,875 INFO L226 Difference]: Without dead ends: 10541 [2022-01-18 15:53:54,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=608, Invalid=3948, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 15:53:54,876 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 477 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 4172 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 4492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 4172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:54,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 229 Invalid, 4492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 4172 Invalid, 0 Unknown, 53 Unchecked, 1.6s Time] [2022-01-18 15:53:54,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10541 states. [2022-01-18 15:53:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10541 to 8174. [2022-01-18 15:53:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8174 states, 8173 states have (on average 4.474489171662792) internal successors, (36570), 8173 states have internal predecessors, (36570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8174 states to 8174 states and 36570 transitions. [2022-01-18 15:53:55,037 INFO L78 Accepts]: Start accepts. Automaton has 8174 states and 36570 transitions. Word has length 30 [2022-01-18 15:53:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:55,037 INFO L470 AbstractCegarLoop]: Abstraction has 8174 states and 36570 transitions. [2022-01-18 15:53:55,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 8174 states and 36570 transitions. [2022-01-18 15:53:55,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:55,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:55,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:55,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:55,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:55,268 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:55,268 INFO L85 PathProgramCache]: Analyzing trace with hash 605402738, now seen corresponding path program 28 times [2022-01-18 15:53:55,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:55,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356095026] [2022-01-18 15:53:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:55,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:55,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:55,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356095026] [2022-01-18 15:53:55,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356095026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:55,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930033459] [2022-01-18 15:53:55,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:53:55,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:55,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:55,402 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:55,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-18 15:53:55,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:53:55,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:55,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:53:55,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:55,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 15:53:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:55,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:55,719 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:53:55,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:53:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:55,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930033459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:55,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:55,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 15:53:55,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621578032] [2022-01-18 15:53:55,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:55,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:53:55,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:55,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:53:55,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:53:55,776 INFO L87 Difference]: Start difference. First operand 8174 states and 36570 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:57,282 INFO L93 Difference]: Finished difference Result 9680 states and 42763 transitions. [2022-01-18 15:53:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:53:57,282 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:53:57,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:57,305 INFO L225 Difference]: With dead ends: 9680 [2022-01-18 15:53:57,305 INFO L226 Difference]: Without dead ends: 9599 [2022-01-18 15:53:57,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:53:57,305 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 418 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 2888 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 3070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:57,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 172 Invalid, 3070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2888 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 15:53:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9599 states. [2022-01-18 15:53:57,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9599 to 8174. [2022-01-18 15:53:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8174 states, 8173 states have (on average 4.474489171662792) internal successors, (36570), 8173 states have internal predecessors, (36570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8174 states to 8174 states and 36570 transitions. [2022-01-18 15:53:57,455 INFO L78 Accepts]: Start accepts. Automaton has 8174 states and 36570 transitions. Word has length 30 [2022-01-18 15:53:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:57,455 INFO L470 AbstractCegarLoop]: Abstraction has 8174 states and 36570 transitions. [2022-01-18 15:53:57,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:57,455 INFO L276 IsEmpty]: Start isEmpty. Operand 8174 states and 36570 transitions. [2022-01-18 15:53:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:53:57,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:57,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:57,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:57,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-01-18 15:53:57,685 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:53:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:57,685 INFO L85 PathProgramCache]: Analyzing trace with hash -31064116, now seen corresponding path program 29 times [2022-01-18 15:53:57,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:57,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485172658] [2022-01-18 15:53:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:57,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:57,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485172658] [2022-01-18 15:53:57,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485172658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670013476] [2022-01-18 15:53:57,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:53:57,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:57,837 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:57,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-18 15:53:57,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:53:57,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:57,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:53:57,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:58,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:58,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:58,026 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 22 treesize of output 48 [2022-01-18 15:53:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:58,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:58,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:58,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:58,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:53:58,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:58,636 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 48 treesize of output 9 [2022-01-18 15:53:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:58,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670013476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:58,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:58,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2022-01-18 15:53:58,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8444513] [2022-01-18 15:53:58,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:58,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 15:53:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:58,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 15:53:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:53:58,671 INFO L87 Difference]: Start difference. First operand 8174 states and 36570 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:03,514 INFO L93 Difference]: Finished difference Result 11080 states and 47478 transitions. [2022-01-18 15:54:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 15:54:03,515 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:03,542 INFO L225 Difference]: With dead ends: 11080 [2022-01-18 15:54:03,542 INFO L226 Difference]: Without dead ends: 10834 [2022-01-18 15:54:03,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1176, Invalid=8136, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 15:54:03,543 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 860 mSDsluCounter, 2504 mSDsCounter, 0 mSdLazyCounter, 4264 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 5697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 4264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1102 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:03,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 357 Invalid, 5697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 4264 Invalid, 0 Unknown, 1102 Unchecked, 2.1s Time] [2022-01-18 15:54:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2022-01-18 15:54:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8166. [2022-01-18 15:54:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 8165 states have (on average 4.477281077770973) internal successors, (36557), 8165 states have internal predecessors, (36557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 36557 transitions. [2022-01-18 15:54:03,710 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 36557 transitions. Word has length 30 [2022-01-18 15:54:03,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:03,710 INFO L470 AbstractCegarLoop]: Abstraction has 8166 states and 36557 transitions. [2022-01-18 15:54:03,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:03,710 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 36557 transitions. [2022-01-18 15:54:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:03,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:03,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:03,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:03,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-01-18 15:54:03,940 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:03,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1850610289, now seen corresponding path program 6 times [2022-01-18 15:54:03,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:03,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404506549] [2022-01-18 15:54:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:03,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:04,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:04,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404506549] [2022-01-18 15:54:04,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404506549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:04,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053147678] [2022-01-18 15:54:04,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:54:04,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:04,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:04,151 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:04,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-18 15:54:04,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:54:04,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:04,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 15:54:04,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:04,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:04,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:04,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:04,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:54:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:04,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:05,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:05,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:05,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:05,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:05,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:54:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:05,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053147678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:05,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:05,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 31 [2022-01-18 15:54:05,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491882067] [2022-01-18 15:54:05,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:05,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:54:05,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:54:05,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:54:05,546 INFO L87 Difference]: Start difference. First operand 8166 states and 36557 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:08,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:08,140 INFO L93 Difference]: Finished difference Result 10204 states and 44245 transitions. [2022-01-18 15:54:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 15:54:08,140 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:08,164 INFO L225 Difference]: With dead ends: 10204 [2022-01-18 15:54:08,164 INFO L226 Difference]: Without dead ends: 10046 [2022-01-18 15:54:08,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=564, Invalid=4266, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:54:08,165 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 582 mSDsluCounter, 2315 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 4687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3021 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:08,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 280 Invalid, 4687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1548 Invalid, 0 Unknown, 3021 Unchecked, 0.7s Time] [2022-01-18 15:54:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2022-01-18 15:54:08,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 8203. [2022-01-18 15:54:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8203 states, 8202 states have (on average 4.473664959765911) internal successors, (36693), 8202 states have internal predecessors, (36693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8203 states to 8203 states and 36693 transitions. [2022-01-18 15:54:08,319 INFO L78 Accepts]: Start accepts. Automaton has 8203 states and 36693 transitions. Word has length 30 [2022-01-18 15:54:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:08,319 INFO L470 AbstractCegarLoop]: Abstraction has 8203 states and 36693 transitions. [2022-01-18 15:54:08,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8203 states and 36693 transitions. [2022-01-18 15:54:08,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:08,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:08,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:08,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-01-18 15:54:08,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-01-18 15:54:08,546 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:08,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:08,547 INFO L85 PathProgramCache]: Analyzing trace with hash 274169934, now seen corresponding path program 30 times [2022-01-18 15:54:08,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:08,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530628814] [2022-01-18 15:54:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:08,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:08,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:08,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530628814] [2022-01-18 15:54:08,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530628814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:08,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095085358] [2022-01-18 15:54:08,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:54:08,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:08,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:08,742 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:08,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-18 15:54:08,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:54:08,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:08,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:54:08,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:09,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:09,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:09,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:09,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:09,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:54:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:09,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:09,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:09,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:09,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:09,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:09,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:54:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:09,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095085358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:09,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:09,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:54:09,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310458315] [2022-01-18 15:54:09,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:09,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:54:09,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:54:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:54:09,830 INFO L87 Difference]: Start difference. First operand 8203 states and 36693 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:11,811 INFO L93 Difference]: Finished difference Result 10443 states and 45115 transitions. [2022-01-18 15:54:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:54:11,811 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:11,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:11,836 INFO L225 Difference]: With dead ends: 10443 [2022-01-18 15:54:11,836 INFO L226 Difference]: Without dead ends: 10361 [2022-01-18 15:54:11,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=413, Invalid=3369, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 15:54:11,837 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 366 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 3830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1843 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:11,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 291 Invalid, 3830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1901 Invalid, 0 Unknown, 1843 Unchecked, 0.8s Time] [2022-01-18 15:54:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10361 states. [2022-01-18 15:54:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10361 to 8219. [2022-01-18 15:54:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8219 states, 8218 states have (on average 4.470309077634461) internal successors, (36737), 8218 states have internal predecessors, (36737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8219 states to 8219 states and 36737 transitions. [2022-01-18 15:54:12,064 INFO L78 Accepts]: Start accepts. Automaton has 8219 states and 36737 transitions. Word has length 30 [2022-01-18 15:54:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:12,064 INFO L470 AbstractCegarLoop]: Abstraction has 8219 states and 36737 transitions. [2022-01-18 15:54:12,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 8219 states and 36737 transitions. [2022-01-18 15:54:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:12,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:12,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:12,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:12,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2022-01-18 15:54:12,287 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:12,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:12,288 INFO L85 PathProgramCache]: Analyzing trace with hash 276944590, now seen corresponding path program 31 times [2022-01-18 15:54:12,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:12,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079350868] [2022-01-18 15:54:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:12,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:12,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:12,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079350868] [2022-01-18 15:54:12,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079350868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:12,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639368126] [2022-01-18 15:54:12,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:54:12,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:12,445 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:12,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-18 15:54:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:12,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:54:12,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:12,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:12,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:12,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:12,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:54:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:12,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:12,902 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:12,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:54:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:12,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:12,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:12,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:54:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:12,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639368126] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:12,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:12,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:54:12,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929731754] [2022-01-18 15:54:12,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:12,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:54:12,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:12,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:54:12,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:54:12,955 INFO L87 Difference]: Start difference. First operand 8219 states and 36737 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:13,864 INFO L93 Difference]: Finished difference Result 9157 states and 40502 transitions. [2022-01-18 15:54:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:54:13,864 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:13,888 INFO L225 Difference]: With dead ends: 9157 [2022-01-18 15:54:13,888 INFO L226 Difference]: Without dead ends: 9136 [2022-01-18 15:54:13,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:54:13,889 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 175 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 462 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:13,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 177 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1748 Invalid, 0 Unknown, 462 Unchecked, 0.6s Time] [2022-01-18 15:54:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2022-01-18 15:54:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 8275. [2022-01-18 15:54:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8275 states, 8274 states have (on average 4.46881798404641) internal successors, (36975), 8274 states have internal predecessors, (36975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8275 states to 8275 states and 36975 transitions. [2022-01-18 15:54:14,053 INFO L78 Accepts]: Start accepts. Automaton has 8275 states and 36975 transitions. Word has length 30 [2022-01-18 15:54:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:14,053 INFO L470 AbstractCegarLoop]: Abstraction has 8275 states and 36975 transitions. [2022-01-18 15:54:14,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 8275 states and 36975 transitions. [2022-01-18 15:54:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:14,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:14,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:14,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:14,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2022-01-18 15:54:14,284 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:14,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash -229401676, now seen corresponding path program 32 times [2022-01-18 15:54:14,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:14,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945833451] [2022-01-18 15:54:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:14,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:14,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:14,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945833451] [2022-01-18 15:54:14,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945833451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:14,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374076683] [2022-01-18 15:54:14,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:54:14,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:14,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:14,505 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:14,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-18 15:54:14,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:54:14,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:14,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:54:14,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:14,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:14,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:14,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:14,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:14,887 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 [2022-01-18 15:54:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:15,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:15,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:15,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:15,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:15,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:15,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:54:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:15,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374076683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:15,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:15,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:54:15,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424110482] [2022-01-18 15:54:15,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:15,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:54:15,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:15,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:54:15,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:54:15,579 INFO L87 Difference]: Start difference. First operand 8275 states and 36975 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:18,060 INFO L93 Difference]: Finished difference Result 10685 states and 46084 transitions. [2022-01-18 15:54:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:54:18,060 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:18,084 INFO L225 Difference]: With dead ends: 10685 [2022-01-18 15:54:18,085 INFO L226 Difference]: Without dead ends: 10603 [2022-01-18 15:54:18,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=443, Invalid=3589, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 15:54:18,085 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 352 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 3931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1202 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:18,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 320 Invalid, 3931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2618 Invalid, 0 Unknown, 1202 Unchecked, 1.1s Time] [2022-01-18 15:54:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10603 states. [2022-01-18 15:54:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10603 to 8291. [2022-01-18 15:54:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8291 states, 8290 states have (on average 4.466103739445114) internal successors, (37024), 8290 states have internal predecessors, (37024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8291 states to 8291 states and 37024 transitions. [2022-01-18 15:54:18,244 INFO L78 Accepts]: Start accepts. Automaton has 8291 states and 37024 transitions. Word has length 30 [2022-01-18 15:54:18,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:18,244 INFO L470 AbstractCegarLoop]: Abstraction has 8291 states and 37024 transitions. [2022-01-18 15:54:18,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 8291 states and 37024 transitions. [2022-01-18 15:54:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:18,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:18,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:18,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:18,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-01-18 15:54:18,475 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash -228614035, now seen corresponding path program 2 times [2022-01-18 15:54:18,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:18,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617626291] [2022-01-18 15:54:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:18,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:18,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:18,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617626291] [2022-01-18 15:54:18,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617626291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:18,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030374125] [2022-01-18 15:54:18,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:54:18,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:18,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:18,683 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:18,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-18 15:54:18,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:54:18,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:18,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:54:18,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:19,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:19,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:19,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:54:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:19,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:19,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:19,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:19,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:19,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:19,676 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:54:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:19,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030374125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:19,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:19,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:54:19,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606712503] [2022-01-18 15:54:19,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:19,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:54:19,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:19,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:54:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:54:19,706 INFO L87 Difference]: Start difference. First operand 8291 states and 37024 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:21,851 INFO L93 Difference]: Finished difference Result 10552 states and 46179 transitions. [2022-01-18 15:54:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 15:54:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:21,882 INFO L225 Difference]: With dead ends: 10552 [2022-01-18 15:54:21,882 INFO L226 Difference]: Without dead ends: 10454 [2022-01-18 15:54:21,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=451, Invalid=3209, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 15:54:21,883 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 436 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 2184 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 3915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1580 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:21,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 309 Invalid, 3915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2184 Invalid, 0 Unknown, 1580 Unchecked, 1.0s Time] [2022-01-18 15:54:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10454 states. [2022-01-18 15:54:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10454 to 8391. [2022-01-18 15:54:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8391 states, 8390 states have (on average 4.466507747318236) internal successors, (37474), 8390 states have internal predecessors, (37474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 37474 transitions. [2022-01-18 15:54:22,107 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 37474 transitions. Word has length 30 [2022-01-18 15:54:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:22,107 INFO L470 AbstractCegarLoop]: Abstraction has 8391 states and 37474 transitions. [2022-01-18 15:54:22,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:22,107 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 37474 transitions. [2022-01-18 15:54:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:22,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:22,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:22,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:22,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-01-18 15:54:22,339 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash -734960301, now seen corresponding path program 3 times [2022-01-18 15:54:22,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:22,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218794368] [2022-01-18 15:54:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:22,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:22,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:22,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218794368] [2022-01-18 15:54:22,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218794368] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:22,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728852862] [2022-01-18 15:54:22,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:54:22,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:22,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:22,539 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:22,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-18 15:54:22,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:54:22,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:22,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:54:22,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:22,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:22,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:22,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:22,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:22,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:54:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:23,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:23,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:23,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:23,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:23,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:23,434 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 47 treesize of output 7 [2022-01-18 15:54:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:23,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728852862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:23,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:23,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:54:23,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993949726] [2022-01-18 15:54:23,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:23,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:54:23,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:54:23,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:54:23,463 INFO L87 Difference]: Start difference. First operand 8391 states and 37474 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:25,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:25,171 INFO L93 Difference]: Finished difference Result 10789 states and 46473 transitions. [2022-01-18 15:54:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 15:54:25,171 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:25,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:25,200 INFO L225 Difference]: With dead ends: 10789 [2022-01-18 15:54:25,201 INFO L226 Difference]: Without dead ends: 10665 [2022-01-18 15:54:25,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 15:54:25,201 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 348 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 3406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1233 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:25,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 279 Invalid, 3406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2084 Invalid, 0 Unknown, 1233 Unchecked, 0.7s Time] [2022-01-18 15:54:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10665 states. [2022-01-18 15:54:25,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10665 to 8429. [2022-01-18 15:54:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8429 states, 8428 states have (on average 4.462149976269577) internal successors, (37607), 8428 states have internal predecessors, (37607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8429 states to 8429 states and 37607 transitions. [2022-01-18 15:54:25,384 INFO L78 Accepts]: Start accepts. Automaton has 8429 states and 37607 transitions. Word has length 30 [2022-01-18 15:54:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:25,384 INFO L470 AbstractCegarLoop]: Abstraction has 8429 states and 37607 transitions. [2022-01-18 15:54:25,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 8429 states and 37607 transitions. [2022-01-18 15:54:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:25,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:25,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:25,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:25,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:25,617 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:25,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:25,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1359174006, now seen corresponding path program 33 times [2022-01-18 15:54:25,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:25,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67584030] [2022-01-18 15:54:25,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:25,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:25,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:25,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67584030] [2022-01-18 15:54:25,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67584030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:25,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814413859] [2022-01-18 15:54:25,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:54:25,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:25,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:25,762 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:25,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-18 15:54:25,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:54:25,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:25,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:54:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:25,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:25,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-01-18 15:54:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:26,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:26,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:26,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:26,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:26,507 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 47 treesize of output 64 [2022-01-18 15:54:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:26,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814413859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:26,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:26,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-01-18 15:54:26,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522037313] [2022-01-18 15:54:26,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:26,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:54:26,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:26,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:54:26,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:54:26,589 INFO L87 Difference]: Start difference. First operand 8429 states and 37607 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:30,815 INFO L93 Difference]: Finished difference Result 11989 states and 51891 transitions. [2022-01-18 15:54:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 15:54:30,815 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:30,844 INFO L225 Difference]: With dead ends: 11989 [2022-01-18 15:54:30,844 INFO L226 Difference]: Without dead ends: 11864 [2022-01-18 15:54:30,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3338 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1571, Invalid=7935, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 15:54:30,845 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 660 mSDsluCounter, 2454 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 5070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2448 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:30,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 300 Invalid, 5070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2390 Invalid, 0 Unknown, 2448 Unchecked, 1.0s Time] [2022-01-18 15:54:30,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11864 states. [2022-01-18 15:54:30,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11864 to 8566. [2022-01-18 15:54:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8566 states, 8565 states have (on average 4.449153531815528) internal successors, (38107), 8565 states have internal predecessors, (38107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8566 states to 8566 states and 38107 transitions. [2022-01-18 15:54:31,025 INFO L78 Accepts]: Start accepts. Automaton has 8566 states and 38107 transitions. Word has length 30 [2022-01-18 15:54:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:31,025 INFO L470 AbstractCegarLoop]: Abstraction has 8566 states and 38107 transitions. [2022-01-18 15:54:31,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:31,025 INFO L276 IsEmpty]: Start isEmpty. Operand 8566 states and 38107 transitions. [2022-01-18 15:54:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:31,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:31,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:31,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:31,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:31,241 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1470698069, now seen corresponding path program 5 times [2022-01-18 15:54:31,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:31,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417599299] [2022-01-18 15:54:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:31,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:31,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:31,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417599299] [2022-01-18 15:54:31,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417599299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:31,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415907981] [2022-01-18 15:54:31,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:54:31,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:31,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:31,428 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:31,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-18 15:54:31,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:54:31,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:31,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:54:31,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:31,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 15:54:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:31,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:31,939 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:31,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-01-18 15:54:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:32,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415907981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:32,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:32,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:54:32,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260725880] [2022-01-18 15:54:32,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:32,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:54:32,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:32,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:54:32,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:54:32,083 INFO L87 Difference]: Start difference. First operand 8566 states and 38107 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:33,644 INFO L93 Difference]: Finished difference Result 10865 states and 47365 transitions. [2022-01-18 15:54:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:54:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:33,670 INFO L225 Difference]: With dead ends: 10865 [2022-01-18 15:54:33,670 INFO L226 Difference]: Without dead ends: 10794 [2022-01-18 15:54:33,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=413, Invalid=2779, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:54:33,671 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 446 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 3233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:33,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 185 Invalid, 3233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3003 Invalid, 0 Unknown, 15 Unchecked, 1.0s Time] [2022-01-18 15:54:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10794 states. [2022-01-18 15:54:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10794 to 8662. [2022-01-18 15:54:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8662 states, 8661 states have (on average 4.44071123426856) internal successors, (38461), 8661 states have internal predecessors, (38461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8662 states to 8662 states and 38461 transitions. [2022-01-18 15:54:33,832 INFO L78 Accepts]: Start accepts. Automaton has 8662 states and 38461 transitions. Word has length 30 [2022-01-18 15:54:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:33,832 INFO L470 AbstractCegarLoop]: Abstraction has 8662 states and 38461 transitions. [2022-01-18 15:54:33,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 8662 states and 38461 transitions. [2022-01-18 15:54:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:33,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:33,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:33,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:34,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:34,063 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:34,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:34,063 INFO L85 PathProgramCache]: Analyzing trace with hash 566860072, now seen corresponding path program 34 times [2022-01-18 15:54:34,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:34,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018697033] [2022-01-18 15:54:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:34,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:34,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:34,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018697033] [2022-01-18 15:54:34,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018697033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:34,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488799528] [2022-01-18 15:54:34,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:54:34,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:34,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:34,250 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:34,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-18 15:54:34,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:54:34,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:54:34,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:34,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 15:54:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:34,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:34,705 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:34,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:54:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:34,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488799528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:34,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:34,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:54:34,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718529755] [2022-01-18 15:54:34,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:34,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:54:34,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:34,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:54:34,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:54:34,786 INFO L87 Difference]: Start difference. First operand 8662 states and 38461 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:37,135 INFO L93 Difference]: Finished difference Result 10297 states and 45122 transitions. [2022-01-18 15:54:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:54:37,135 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:37,160 INFO L225 Difference]: With dead ends: 10297 [2022-01-18 15:54:37,160 INFO L226 Difference]: Without dead ends: 10226 [2022-01-18 15:54:37,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=413, Invalid=2557, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:54:37,160 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 375 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 3702 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 3889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:37,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 216 Invalid, 3889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3702 Invalid, 0 Unknown, 25 Unchecked, 1.4s Time] [2022-01-18 15:54:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10226 states. [2022-01-18 15:54:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10226 to 8694. [2022-01-18 15:54:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8694 states, 8693 states have (on average 4.436443115150121) internal successors, (38566), 8693 states have internal predecessors, (38566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8694 states to 8694 states and 38566 transitions. [2022-01-18 15:54:37,351 INFO L78 Accepts]: Start accepts. Automaton has 8694 states and 38566 transitions. Word has length 30 [2022-01-18 15:54:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:37,351 INFO L470 AbstractCegarLoop]: Abstraction has 8694 states and 38566 transitions. [2022-01-18 15:54:37,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 8694 states and 38566 transitions. [2022-01-18 15:54:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:37,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:37,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:37,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-01-18 15:54:37,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-01-18 15:54:37,582 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash 60513806, now seen corresponding path program 35 times [2022-01-18 15:54:37,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:37,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181652319] [2022-01-18 15:54:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:37,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:37,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:37,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181652319] [2022-01-18 15:54:37,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181652319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:37,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93295716] [2022-01-18 15:54:37,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:54:37,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:37,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:37,727 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:37,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-18 15:54:37,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:54:37,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:37,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:54:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:37,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 15:54:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:37,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:38,056 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:38,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 48 [2022-01-18 15:54:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:38,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93295716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:38,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:38,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:54:38,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737372021] [2022-01-18 15:54:38,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:38,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:54:38,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:38,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:54:38,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:54:38,110 INFO L87 Difference]: Start difference. First operand 8694 states and 38566 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:39,962 INFO L93 Difference]: Finished difference Result 10314 states and 45192 transitions. [2022-01-18 15:54:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 15:54:39,962 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:39,987 INFO L225 Difference]: With dead ends: 10314 [2022-01-18 15:54:39,988 INFO L226 Difference]: Without dead ends: 10250 [2022-01-18 15:54:39,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=477, Invalid=3063, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 15:54:39,988 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 370 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 3592 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 3754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:39,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 203 Invalid, 3754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3592 Invalid, 0 Unknown, 18 Unchecked, 1.1s Time] [2022-01-18 15:54:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10250 states. [2022-01-18 15:54:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10250 to 8666. [2022-01-18 15:54:40,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8666 states, 8665 states have (on average 4.4436237738026545) internal successors, (38504), 8665 states have internal predecessors, (38504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8666 states to 8666 states and 38504 transitions. [2022-01-18 15:54:40,147 INFO L78 Accepts]: Start accepts. Automaton has 8666 states and 38504 transitions. Word has length 30 [2022-01-18 15:54:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:40,147 INFO L470 AbstractCegarLoop]: Abstraction has 8666 states and 38504 transitions. [2022-01-18 15:54:40,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 8666 states and 38504 transitions. [2022-01-18 15:54:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:40,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:40,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:40,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-01-18 15:54:40,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:40,367 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:40,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:40,367 INFO L85 PathProgramCache]: Analyzing trace with hash -789471230, now seen corresponding path program 36 times [2022-01-18 15:54:40,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:40,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071129315] [2022-01-18 15:54:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:40,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:40,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:40,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071129315] [2022-01-18 15:54:40,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071129315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:40,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635283558] [2022-01-18 15:54:40,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:54:40,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:40,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:40,566 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:40,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-18 15:54:40,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:54:40,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:40,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 15:54:40,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:40,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:40,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:40,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:40,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:40,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-01-18 15:54:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:40,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:41,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:41,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:41,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:41,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:54:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:41,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635283558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:41,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:41,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-01-18 15:54:41,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263721534] [2022-01-18 15:54:41,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:41,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:54:41,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:54:41,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:54:41,518 INFO L87 Difference]: Start difference. First operand 8666 states and 38504 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:44,271 INFO L93 Difference]: Finished difference Result 11213 states and 48225 transitions. [2022-01-18 15:54:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 15:54:44,272 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:44,298 INFO L225 Difference]: With dead ends: 11213 [2022-01-18 15:54:44,298 INFO L226 Difference]: Without dead ends: 11185 [2022-01-18 15:54:44,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=728, Invalid=5124, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 15:54:44,299 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 465 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1857 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:44,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 250 Invalid, 3735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1687 Invalid, 0 Unknown, 1857 Unchecked, 0.8s Time] [2022-01-18 15:54:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11185 states. [2022-01-18 15:54:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11185 to 8744. [2022-01-18 15:54:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8744 states, 8743 states have (on average 4.437264096991879) internal successors, (38795), 8743 states have internal predecessors, (38795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8744 states to 8744 states and 38795 transitions. [2022-01-18 15:54:44,467 INFO L78 Accepts]: Start accepts. Automaton has 8744 states and 38795 transitions. Word has length 30 [2022-01-18 15:54:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:44,467 INFO L470 AbstractCegarLoop]: Abstraction has 8744 states and 38795 transitions. [2022-01-18 15:54:44,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 8744 states and 38795 transitions. [2022-01-18 15:54:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:44,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:44,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:44,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:44,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-01-18 15:54:44,688 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:44,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1698041603, now seen corresponding path program 4 times [2022-01-18 15:54:44,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:44,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476756893] [2022-01-18 15:54:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:44,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:44,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:44,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476756893] [2022-01-18 15:54:44,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476756893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:44,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860066798] [2022-01-18 15:54:44,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:54:44,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:44,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:44,876 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:44,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-01-18 15:54:44,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:54:44,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:44,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:54:44,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:45,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 15:54:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:45,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:45,279 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:45,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 49 [2022-01-18 15:54:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:45,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860066798] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:45,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:45,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-18 15:54:45,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811592737] [2022-01-18 15:54:45,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:45,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:54:45,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:54:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:54:45,332 INFO L87 Difference]: Start difference. First operand 8744 states and 38795 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:47,725 INFO L93 Difference]: Finished difference Result 10467 states and 45746 transitions. [2022-01-18 15:54:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:54:47,726 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:47,750 INFO L225 Difference]: With dead ends: 10467 [2022-01-18 15:54:47,751 INFO L226 Difference]: Without dead ends: 10344 [2022-01-18 15:54:47,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=444, Invalid=2748, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:54:47,751 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 366 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 4198 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 4332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 4198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:47,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 239 Invalid, 4332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 4198 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-18 15:54:47,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10344 states. [2022-01-18 15:54:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10344 to 8596. [2022-01-18 15:54:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8596 states, 8595 states have (on average 4.450610820244328) internal successors, (38253), 8595 states have internal predecessors, (38253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 38253 transitions. [2022-01-18 15:54:47,908 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 38253 transitions. Word has length 30 [2022-01-18 15:54:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:47,908 INFO L470 AbstractCegarLoop]: Abstraction has 8596 states and 38253 transitions. [2022-01-18 15:54:47,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 38253 transitions. [2022-01-18 15:54:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:47,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:47,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:47,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:48,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-01-18 15:54:48,138 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1201662257, now seen corresponding path program 6 times [2022-01-18 15:54:48,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:48,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756107791] [2022-01-18 15:54:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:48,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:48,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:48,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756107791] [2022-01-18 15:54:48,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756107791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:48,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674994617] [2022-01-18 15:54:48,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:54:48,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:48,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:48,298 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:48,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-01-18 15:54:48,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:54:48,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:48,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:54:48,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:48,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:48,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:48,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:54:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:48,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:48,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:48,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:48,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:48,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:48,883 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:54:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:48,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674994617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:48,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:48,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-01-18 15:54:48,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74947415] [2022-01-18 15:54:48,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:48,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:54:48,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:54:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:54:48,909 INFO L87 Difference]: Start difference. First operand 8596 states and 38253 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:52,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:52,352 INFO L93 Difference]: Finished difference Result 12162 states and 51677 transitions. [2022-01-18 15:54:52,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 15:54:52,353 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:52,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:52,380 INFO L225 Difference]: With dead ends: 12162 [2022-01-18 15:54:52,380 INFO L226 Difference]: Without dead ends: 11940 [2022-01-18 15:54:52,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2234 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=940, Invalid=6542, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 15:54:52,381 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 728 mSDsluCounter, 2789 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2341 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:52,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 352 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3267 Invalid, 0 Unknown, 2341 Unchecked, 1.3s Time] [2022-01-18 15:54:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11940 states. [2022-01-18 15:54:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11940 to 8510. [2022-01-18 15:54:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8510 states, 8509 states have (on average 4.454930074039252) internal successors, (37907), 8509 states have internal predecessors, (37907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 37907 transitions. [2022-01-18 15:54:52,541 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 37907 transitions. Word has length 30 [2022-01-18 15:54:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:52,541 INFO L470 AbstractCegarLoop]: Abstraction has 8510 states and 37907 transitions. [2022-01-18 15:54:52,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:52,541 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 37907 transitions. [2022-01-18 15:54:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:52,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:52,556 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:52,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:52,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-01-18 15:54:52,760 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1878837290, now seen corresponding path program 1 times [2022-01-18 15:54:52,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:52,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932719729] [2022-01-18 15:54:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:52,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:53,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:53,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932719729] [2022-01-18 15:54:53,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932719729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:53,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800149557] [2022-01-18 15:54:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:53,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:53,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:53,020 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:53,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-01-18 15:54:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:53,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:54:53,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:53,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:53,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:53,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:53,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:54:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:53,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:53,518 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:54:53,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:54:53,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:53,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:53,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:53,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:53,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:54:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:53,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800149557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:53,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:53,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-01-18 15:54:53,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340469465] [2022-01-18 15:54:53,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:53,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:54:53,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:53,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:54:53,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:54:53,573 INFO L87 Difference]: Start difference. First operand 8510 states and 37907 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:54,436 INFO L93 Difference]: Finished difference Result 8877 states and 39328 transitions. [2022-01-18 15:54:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:54:54,436 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:54:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:54,457 INFO L225 Difference]: With dead ends: 8877 [2022-01-18 15:54:54,457 INFO L226 Difference]: Without dead ends: 8836 [2022-01-18 15:54:54,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:54:54,458 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:54,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 114 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1682 Invalid, 0 Unknown, 264 Unchecked, 0.6s Time] [2022-01-18 15:54:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2022-01-18 15:54:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 8531. [2022-01-18 15:54:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8531 states, 8530 states have (on average 4.453810082063306) internal successors, (37991), 8530 states have internal predecessors, (37991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8531 states to 8531 states and 37991 transitions. [2022-01-18 15:54:54,602 INFO L78 Accepts]: Start accepts. Automaton has 8531 states and 37991 transitions. Word has length 30 [2022-01-18 15:54:54,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:54,602 INFO L470 AbstractCegarLoop]: Abstraction has 8531 states and 37991 transitions. [2022-01-18 15:54:54,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8531 states and 37991 transitions. [2022-01-18 15:54:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:54,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:54,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:54,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-01-18 15:54:54,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:54,820 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:54,820 INFO L85 PathProgramCache]: Analyzing trace with hash -509086556, now seen corresponding path program 2 times [2022-01-18 15:54:54,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:54,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094041088] [2022-01-18 15:54:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:54,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:55,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:55,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094041088] [2022-01-18 15:54:55,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094041088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:55,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348789452] [2022-01-18 15:54:55,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:54:55,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:55,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:55,037 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:55,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-01-18 15:54:55,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:54:55,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:54:55,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:55,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:55,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:55,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:55,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-01-18 15:54:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:55,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:55,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:55,837 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:54:55,837 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:54:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:55,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348789452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:55,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:55,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-01-18 15:54:55,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937371622] [2022-01-18 15:54:55,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:55,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:54:55,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:55,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:54:55,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:54:55,990 INFO L87 Difference]: Start difference. First operand 8531 states and 37991 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:54:57,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:57,071 INFO L93 Difference]: Finished difference Result 8869 states and 39315 transitions. [2022-01-18 15:54:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:54:57,072 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 30 [2022-01-18 15:54:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:57,093 INFO L225 Difference]: With dead ends: 8869 [2022-01-18 15:54:57,093 INFO L226 Difference]: Without dead ends: 8836 [2022-01-18 15:54:57,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=1556, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:54:57,093 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:57,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 104 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1152 Invalid, 0 Unknown, 483 Unchecked, 0.5s Time] [2022-01-18 15:54:57,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2022-01-18 15:54:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 8531. [2022-01-18 15:54:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8531 states, 8530 states have (on average 4.453810082063306) internal successors, (37991), 8530 states have internal predecessors, (37991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8531 states to 8531 states and 37991 transitions. [2022-01-18 15:54:57,241 INFO L78 Accepts]: Start accepts. Automaton has 8531 states and 37991 transitions. Word has length 30 [2022-01-18 15:54:57,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:57,241 INFO L470 AbstractCegarLoop]: Abstraction has 8531 states and 37991 transitions. [2022-01-18 15:54:57,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:54:57,242 INFO L276 IsEmpty]: Start isEmpty. Operand 8531 states and 37991 transitions. [2022-01-18 15:54:57,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:54:57,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:57,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:57,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:57,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:57,472 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:54:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:57,472 INFO L85 PathProgramCache]: Analyzing trace with hash 628018918, now seen corresponding path program 3 times [2022-01-18 15:54:57,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:57,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391939466] [2022-01-18 15:54:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:57,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:57,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:57,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391939466] [2022-01-18 15:54:57,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391939466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:57,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411950606] [2022-01-18 15:54:57,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:54:57,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:57,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:57,684 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:57,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-01-18 15:54:57,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:54:57,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:57,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:54:57,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:58,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:58,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:58,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:58,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 38 [2022-01-18 15:54:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:58,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:58,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:58,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:54:58,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:58,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 65 [2022-01-18 15:54:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:58,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411950606] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:58,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:58,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-18 15:54:58,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928826363] [2022-01-18 15:54:58,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:58,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:54:58,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:58,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:54:58,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:54:58,974 INFO L87 Difference]: Start difference. First operand 8531 states and 37991 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:02,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:02,959 INFO L93 Difference]: Finished difference Result 10439 states and 45851 transitions. [2022-01-18 15:55:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 15:55:02,960 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:02,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:02,984 INFO L225 Difference]: With dead ends: 10439 [2022-01-18 15:55:02,984 INFO L226 Difference]: Without dead ends: 10366 [2022-01-18 15:55:02,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=922, Invalid=5884, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 15:55:02,985 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 366 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 4141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2198 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:02,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 200 Invalid, 4141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1776 Invalid, 0 Unknown, 2198 Unchecked, 0.9s Time] [2022-01-18 15:55:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10366 states. [2022-01-18 15:55:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10366 to 8576. [2022-01-18 15:55:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8576 states, 8575 states have (on average 4.4524781341107875) internal successors, (38180), 8575 states have internal predecessors, (38180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:03,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8576 states to 8576 states and 38180 transitions. [2022-01-18 15:55:03,140 INFO L78 Accepts]: Start accepts. Automaton has 8576 states and 38180 transitions. Word has length 30 [2022-01-18 15:55:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:03,140 INFO L470 AbstractCegarLoop]: Abstraction has 8576 states and 38180 transitions. [2022-01-18 15:55:03,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 8576 states and 38180 transitions. [2022-01-18 15:55:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:03,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:03,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:03,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:03,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:03,371 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash -296930938, now seen corresponding path program 4 times [2022-01-18 15:55:03,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:03,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493535910] [2022-01-18 15:55:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:03,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:03,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:03,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493535910] [2022-01-18 15:55:03,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493535910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:03,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631814469] [2022-01-18 15:55:03,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:55:03,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:03,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:03,548 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:03,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-01-18 15:55:03,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:55:03,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:03,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:03,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:03,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:03,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:03,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:55:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:03,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:04,024 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:04,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:55:04,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:04,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:04,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:04,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:04,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:55:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:04,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631814469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:04,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:04,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-01-18 15:55:04,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468647442] [2022-01-18 15:55:04,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:04,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:55:04,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:55:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:55:04,094 INFO L87 Difference]: Start difference. First operand 8576 states and 38180 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:05,019 INFO L93 Difference]: Finished difference Result 8956 states and 39668 transitions. [2022-01-18 15:55:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:55:05,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:05,044 INFO L225 Difference]: With dead ends: 8956 [2022-01-18 15:55:05,044 INFO L226 Difference]: Without dead ends: 8905 [2022-01-18 15:55:05,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:55:05,045 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:05,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 118 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1715 Invalid, 0 Unknown, 417 Unchecked, 0.6s Time] [2022-01-18 15:55:05,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8905 states. [2022-01-18 15:55:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8905 to 8594. [2022-01-18 15:55:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8594 states, 8593 states have (on average 4.452461305713953) internal successors, (38260), 8593 states have internal predecessors, (38260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8594 states to 8594 states and 38260 transitions. [2022-01-18 15:55:05,218 INFO L78 Accepts]: Start accepts. Automaton has 8594 states and 38260 transitions. Word has length 30 [2022-01-18 15:55:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:05,218 INFO L470 AbstractCegarLoop]: Abstraction has 8594 states and 38260 transitions. [2022-01-18 15:55:05,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 8594 states and 38260 transitions. [2022-01-18 15:55:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:05,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:05,233 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:05,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:05,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:05,448 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash -167848219, now seen corresponding path program 1 times [2022-01-18 15:55:05,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:05,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613656065] [2022-01-18 15:55:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:05,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:05,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:05,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613656065] [2022-01-18 15:55:05,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613656065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:05,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879219845] [2022-01-18 15:55:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:05,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:05,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:05,659 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:05,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-01-18 15:55:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:05,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:05,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:05,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:05,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:05,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:05,955 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 34 treesize of output 20 [2022-01-18 15:55:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:06,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:06,254 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:06,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:55:06,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:06,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:06,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:06,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:06,309 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 25 treesize of output 3 [2022-01-18 15:55:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:06,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879219845] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:06,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:06,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-01-18 15:55:06,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704434822] [2022-01-18 15:55:06,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:06,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:55:06,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:06,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:55:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:55:06,334 INFO L87 Difference]: Start difference. First operand 8594 states and 38260 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:07,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:07,379 INFO L93 Difference]: Finished difference Result 8996 states and 39833 transitions. [2022-01-18 15:55:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:55:07,380 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:07,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:07,401 INFO L225 Difference]: With dead ends: 8996 [2022-01-18 15:55:07,401 INFO L226 Difference]: Without dead ends: 8963 [2022-01-18 15:55:07,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:55:07,401 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:07,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 122 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1767 Invalid, 0 Unknown, 28 Unchecked, 0.7s Time] [2022-01-18 15:55:07,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8963 states. [2022-01-18 15:55:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8963 to 8591. [2022-01-18 15:55:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 4.453317811408614) internal successors, (38254), 8590 states have internal predecessors, (38254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 38254 transitions. [2022-01-18 15:55:07,546 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 38254 transitions. Word has length 30 [2022-01-18 15:55:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:07,546 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 38254 transitions. [2022-01-18 15:55:07,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 38254 transitions. [2022-01-18 15:55:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:07,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:07,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:07,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:07,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:07,769 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:07,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2058020683, now seen corresponding path program 1 times [2022-01-18 15:55:07,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:07,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809701658] [2022-01-18 15:55:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:07,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:07,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:07,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809701658] [2022-01-18 15:55:07,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809701658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:07,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986854492] [2022-01-18 15:55:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:07,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:07,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:07,940 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:07,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-01-18 15:55:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:07,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:07,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:08,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:08,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:08,204 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 15:55:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:08,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:08,531 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:08,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:55:08,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:08,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:08,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:08,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:08,590 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:55:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:08,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986854492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:08,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:08,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:55:08,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652765521] [2022-01-18 15:55:08,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:08,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:55:08,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:08,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:55:08,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:55:08,615 INFO L87 Difference]: Start difference. First operand 8591 states and 38254 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:55:09,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:09,662 INFO L93 Difference]: Finished difference Result 9177 states and 40549 transitions. [2022-01-18 15:55:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:55:09,662 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 30 [2022-01-18 15:55:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:09,683 INFO L225 Difference]: With dead ends: 9177 [2022-01-18 15:55:09,683 INFO L226 Difference]: Without dead ends: 9136 [2022-01-18 15:55:09,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:55:09,684 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 141 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:09,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 158 Invalid, 2145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1638 Invalid, 0 Unknown, 455 Unchecked, 0.7s Time] [2022-01-18 15:55:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2022-01-18 15:55:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 8596. [2022-01-18 15:55:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8596 states, 8595 states have (on average 4.453752181500873) internal successors, (38280), 8595 states have internal predecessors, (38280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 38280 transitions. [2022-01-18 15:55:09,834 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 38280 transitions. Word has length 30 [2022-01-18 15:55:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:09,834 INFO L470 AbstractCegarLoop]: Abstraction has 8596 states and 38280 transitions. [2022-01-18 15:55:09,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:55:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 38280 transitions. [2022-01-18 15:55:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:09,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:09,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:09,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-01-18 15:55:10,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2022-01-18 15:55:10,053 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:10,053 INFO L85 PathProgramCache]: Analyzing trace with hash -870643986, now seen corresponding path program 5 times [2022-01-18 15:55:10,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:10,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862211746] [2022-01-18 15:55:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:10,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:10,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:10,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862211746] [2022-01-18 15:55:10,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862211746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:10,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508418072] [2022-01-18 15:55:10,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:55:10,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:10,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:10,277 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:10,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-01-18 15:55:10,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:55:10,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:10,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:10,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:10,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:10,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:10,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:55:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:10,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:10,802 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:10,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:55:10,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:10,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:10,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:55:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:10,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508418072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:10,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:10,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-01-18 15:55:10,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829661414] [2022-01-18 15:55:10,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:10,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:55:10,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:55:10,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:55:10,857 INFO L87 Difference]: Start difference. First operand 8596 states and 38280 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:55:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:11,998 INFO L93 Difference]: Finished difference Result 9286 states and 40984 transitions. [2022-01-18 15:55:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:55:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 30 [2022-01-18 15:55:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:12,021 INFO L225 Difference]: With dead ends: 9286 [2022-01-18 15:55:12,021 INFO L226 Difference]: Without dead ends: 9213 [2022-01-18 15:55:12,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:55:12,021 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 202 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 601 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:12,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 175 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1893 Invalid, 0 Unknown, 601 Unchecked, 0.7s Time] [2022-01-18 15:55:12,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9213 states. [2022-01-18 15:55:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9213 to 8630. [2022-01-18 15:55:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8629 states have (on average 4.452543747827095) internal successors, (38421), 8629 states have internal predecessors, (38421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 38421 transitions. [2022-01-18 15:55:12,171 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 38421 transitions. Word has length 30 [2022-01-18 15:55:12,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:12,172 INFO L470 AbstractCegarLoop]: Abstraction has 8630 states and 38421 transitions. [2022-01-18 15:55:12,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2022-01-18 15:55:12,172 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 38421 transitions. [2022-01-18 15:55:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:12,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:12,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:12,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-01-18 15:55:12,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:12,400 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:12,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash -203933971, now seen corresponding path program 2 times [2022-01-18 15:55:12,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:12,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516961902] [2022-01-18 15:55:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:12,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:12,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:12,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516961902] [2022-01-18 15:55:12,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516961902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:12,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318222667] [2022-01-18 15:55:12,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:55:12,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:12,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:12,605 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:12,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-01-18 15:55:12,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:12,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:12,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:55:12,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:12,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:12,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:12,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:12,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-01-18 15:55:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:12,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:13,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:13,195 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:55:13,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:55:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:13,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318222667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:13,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:13,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 15:55:13,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27455273] [2022-01-18 15:55:13,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:13,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:55:13,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:13,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:55:13,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:55:13,290 INFO L87 Difference]: Start difference. First operand 8630 states and 38421 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 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) [2022-01-18 15:55:14,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:14,431 INFO L93 Difference]: Finished difference Result 9047 states and 40016 transitions. [2022-01-18 15:55:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:55:14,431 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 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 30 [2022-01-18 15:55:14,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:14,452 INFO L225 Difference]: With dead ends: 9047 [2022-01-18 15:55:14,453 INFO L226 Difference]: Without dead ends: 8982 [2022-01-18 15:55:14,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:55:14,453 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 149 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:14,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 130 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1990 Invalid, 0 Unknown, 464 Unchecked, 0.8s Time] [2022-01-18 15:55:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8982 states. [2022-01-18 15:55:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8982 to 8642. [2022-01-18 15:55:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8642 states, 8641 states have (on average 4.4508737414651085) internal successors, (38460), 8641 states have internal predecessors, (38460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 38460 transitions. [2022-01-18 15:55:14,603 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 38460 transitions. Word has length 30 [2022-01-18 15:55:14,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:14,603 INFO L470 AbstractCegarLoop]: Abstraction has 8642 states and 38460 transitions. [2022-01-18 15:55:14,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 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) [2022-01-18 15:55:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 38460 transitions. [2022-01-18 15:55:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:14,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:14,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:14,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:14,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-01-18 15:55:14,827 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:14,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:14,827 INFO L85 PathProgramCache]: Analyzing trace with hash -137181101, now seen corresponding path program 3 times [2022-01-18 15:55:14,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:14,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372303395] [2022-01-18 15:55:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:14,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:15,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:15,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372303395] [2022-01-18 15:55:15,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372303395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:15,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826002498] [2022-01-18 15:55:15,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:55:15,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:15,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:15,046 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:15,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-01-18 15:55:15,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:55:15,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:15,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:55:15,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:15,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:15,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:15,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:15,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-01-18 15:55:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:15,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:15,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:15,655 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:55:15,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:55:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:15,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826002498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:15,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:15,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 15:55:15,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614566969] [2022-01-18 15:55:15,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:15,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:55:15,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:55:15,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:55:15,746 INFO L87 Difference]: Start difference. First operand 8642 states and 38460 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:16,905 INFO L93 Difference]: Finished difference Result 9040 states and 39994 transitions. [2022-01-18 15:55:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:55:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:16,927 INFO L225 Difference]: With dead ends: 9040 [2022-01-18 15:55:16,927 INFO L226 Difference]: Without dead ends: 8967 [2022-01-18 15:55:16,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:55:16,927 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 758 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:16,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 167 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2058 Invalid, 0 Unknown, 758 Unchecked, 0.8s Time] [2022-01-18 15:55:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8967 states. [2022-01-18 15:55:17,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8967 to 8643. [2022-01-18 15:55:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8643 states, 8642 states have (on average 4.450705855126128) internal successors, (38463), 8642 states have internal predecessors, (38463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8643 states to 8643 states and 38463 transitions. [2022-01-18 15:55:17,076 INFO L78 Accepts]: Start accepts. Automaton has 8643 states and 38463 transitions. Word has length 30 [2022-01-18 15:55:17,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:17,076 INFO L470 AbstractCegarLoop]: Abstraction has 8643 states and 38463 transitions. [2022-01-18 15:55:17,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:17,076 INFO L276 IsEmpty]: Start isEmpty. Operand 8643 states and 38463 transitions. [2022-01-18 15:55:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:17,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:17,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:17,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:17,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-01-18 15:55:17,307 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:17,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash 271147347, now seen corresponding path program 4 times [2022-01-18 15:55:17,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:17,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169722294] [2022-01-18 15:55:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:17,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:17,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:17,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169722294] [2022-01-18 15:55:17,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169722294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:17,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15141639] [2022-01-18 15:55:17,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:55:17,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:17,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:17,559 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:17,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-01-18 15:55:17,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:55:17,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:17,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:17,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:17,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:17,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:17,840 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 30 treesize of output 16 [2022-01-18 15:55:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:17,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:18,116 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:18,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:55:18,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:18,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:18,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:18,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:18,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:55:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:18,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15141639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:18,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:18,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2022-01-18 15:55:18,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134775513] [2022-01-18 15:55:18,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:18,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:55:18,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:55:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:55:18,174 INFO L87 Difference]: Start difference. First operand 8643 states and 38463 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:18,909 INFO L93 Difference]: Finished difference Result 9149 states and 40440 transitions. [2022-01-18 15:55:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:55:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:18,931 INFO L225 Difference]: With dead ends: 9149 [2022-01-18 15:55:18,931 INFO L226 Difference]: Without dead ends: 9083 [2022-01-18 15:55:18,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:55:18,931 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:18,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 129 Invalid, 2342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1887 Invalid, 0 Unknown, 428 Unchecked, 0.6s Time] [2022-01-18 15:55:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2022-01-18 15:55:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 8643. [2022-01-18 15:55:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8643 states, 8642 states have (on average 4.449895857440407) internal successors, (38456), 8642 states have internal predecessors, (38456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8643 states to 8643 states and 38456 transitions. [2022-01-18 15:55:19,151 INFO L78 Accepts]: Start accepts. Automaton has 8643 states and 38456 transitions. Word has length 30 [2022-01-18 15:55:19,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:19,151 INFO L470 AbstractCegarLoop]: Abstraction has 8643 states and 38456 transitions. [2022-01-18 15:55:19,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:19,151 INFO L276 IsEmpty]: Start isEmpty. Operand 8643 states and 38456 transitions. [2022-01-18 15:55:19,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:19,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:19,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:19,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:19,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-01-18 15:55:19,379 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1705680498, now seen corresponding path program 1 times [2022-01-18 15:55:19,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:19,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984071134] [2022-01-18 15:55:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:19,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:19,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:19,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984071134] [2022-01-18 15:55:19,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984071134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:19,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821496308] [2022-01-18 15:55:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:19,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:19,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:19,555 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:19,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-01-18 15:55:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:19,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:19,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:19,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:19,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:19,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:55:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:19,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:20,010 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:20,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:55:20,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:20,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:20,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:20,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:20,045 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 25 treesize of output 3 [2022-01-18 15:55:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:20,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821496308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:20,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:20,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:55:20,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213418560] [2022-01-18 15:55:20,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:20,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:55:20,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:20,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:55:20,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:55:20,061 INFO L87 Difference]: Start difference. First operand 8643 states and 38456 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 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) [2022-01-18 15:55:21,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:21,209 INFO L93 Difference]: Finished difference Result 9302 states and 40962 transitions. [2022-01-18 15:55:21,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:55:21,209 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 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 30 [2022-01-18 15:55:21,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:21,230 INFO L225 Difference]: With dead ends: 9302 [2022-01-18 15:55:21,231 INFO L226 Difference]: Without dead ends: 9195 [2022-01-18 15:55:21,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:55:21,231 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 153 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:21,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 168 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2004 Invalid, 0 Unknown, 257 Unchecked, 0.8s Time] [2022-01-18 15:55:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9195 states. [2022-01-18 15:55:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9195 to 8614. [2022-01-18 15:55:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8614 states, 8613 states have (on average 4.45141065830721) internal successors, (38340), 8613 states have internal predecessors, (38340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8614 states to 8614 states and 38340 transitions. [2022-01-18 15:55:21,383 INFO L78 Accepts]: Start accepts. Automaton has 8614 states and 38340 transitions. Word has length 30 [2022-01-18 15:55:21,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:21,383 INFO L470 AbstractCegarLoop]: Abstraction has 8614 states and 38340 transitions. [2022-01-18 15:55:21,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 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) [2022-01-18 15:55:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 8614 states and 38340 transitions. [2022-01-18 15:55:21,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:21,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:21,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:21,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:21,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:21,601 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash -891537741, now seen corresponding path program 5 times [2022-01-18 15:55:21,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:21,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688648576] [2022-01-18 15:55:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:21,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:21,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688648576] [2022-01-18 15:55:21,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688648576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966684046] [2022-01-18 15:55:21,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:55:21,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:21,813 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:21,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-01-18 15:55:21,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:21,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:21,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:21,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:22,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:22,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:22,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:22,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:55:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:22,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:22,260 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:22,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:55:22,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:22,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:22,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:22,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:22,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:55:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:22,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966684046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:22,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:22,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:55:22,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692286454] [2022-01-18 15:55:22,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:22,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:55:22,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:22,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:55:22,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:55:22,323 INFO L87 Difference]: Start difference. First operand 8614 states and 38340 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:23,080 INFO L93 Difference]: Finished difference Result 9335 states and 41213 transitions. [2022-01-18 15:55:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:55:23,080 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:23,102 INFO L225 Difference]: With dead ends: 9335 [2022-01-18 15:55:23,102 INFO L226 Difference]: Without dead ends: 9270 [2022-01-18 15:55:23,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:55:23,102 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 146 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:23,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 199 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1542 Invalid, 0 Unknown, 377 Unchecked, 0.5s Time] [2022-01-18 15:55:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9270 states. [2022-01-18 15:55:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9270 to 8634. [2022-01-18 15:55:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8634 states, 8633 states have (on average 4.450596548129272) internal successors, (38422), 8633 states have internal predecessors, (38422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8634 states to 8634 states and 38422 transitions. [2022-01-18 15:55:23,294 INFO L78 Accepts]: Start accepts. Automaton has 8634 states and 38422 transitions. Word has length 30 [2022-01-18 15:55:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:23,294 INFO L470 AbstractCegarLoop]: Abstraction has 8634 states and 38422 transitions. [2022-01-18 15:55:23,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 8634 states and 38422 transitions. [2022-01-18 15:55:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:23,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:23,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:23,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:23,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-01-18 15:55:23,524 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:23,525 INFO L85 PathProgramCache]: Analyzing trace with hash 959849365, now seen corresponding path program 6 times [2022-01-18 15:55:23,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:23,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911701163] [2022-01-18 15:55:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:23,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:23,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911701163] [2022-01-18 15:55:23,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911701163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566646164] [2022-01-18 15:55:23,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:55:23,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:23,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:23,665 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:23,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-01-18 15:55:23,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:55:23,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:23,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:55:23,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:23,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:23,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:23,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:23,856 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 26 treesize of output 44 [2022-01-18 15:55:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:23,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:24,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:24,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:24,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:24,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:24,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:55:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:24,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566646164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:24,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:24,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:55:24,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228415230] [2022-01-18 15:55:24,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:24,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:55:24,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:24,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:55:24,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:55:24,296 INFO L87 Difference]: Start difference. First operand 8634 states and 38422 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:27,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:27,728 INFO L93 Difference]: Finished difference Result 12179 states and 51762 transitions. [2022-01-18 15:55:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 15:55:27,729 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:27,758 INFO L225 Difference]: With dead ends: 12179 [2022-01-18 15:55:27,758 INFO L226 Difference]: Without dead ends: 12098 [2022-01-18 15:55:27,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 45 SyntacticMatches, 18 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1029, Invalid=7161, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 15:55:27,759 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 804 mSDsluCounter, 2451 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 5218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2413 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:27,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 389 Invalid, 5218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 2490 Invalid, 0 Unknown, 2413 Unchecked, 1.1s Time] [2022-01-18 15:55:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12098 states. [2022-01-18 15:55:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12098 to 8694. [2022-01-18 15:55:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8694 states, 8693 states have (on average 4.447831588634534) internal successors, (38665), 8693 states have internal predecessors, (38665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8694 states to 8694 states and 38665 transitions. [2022-01-18 15:55:27,993 INFO L78 Accepts]: Start accepts. Automaton has 8694 states and 38665 transitions. Word has length 30 [2022-01-18 15:55:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:27,993 INFO L470 AbstractCegarLoop]: Abstraction has 8694 states and 38665 transitions. [2022-01-18 15:55:27,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 8694 states and 38665 transitions. [2022-01-18 15:55:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:28,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:28,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:28,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:28,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-01-18 15:55:28,211 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:28,212 INFO L85 PathProgramCache]: Analyzing trace with hash 66531679, now seen corresponding path program 7 times [2022-01-18 15:55:28,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:28,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223557345] [2022-01-18 15:55:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:28,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:28,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:28,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223557345] [2022-01-18 15:55:28,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223557345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:28,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694944105] [2022-01-18 15:55:28,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:55:28,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:28,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:28,414 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:28,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-01-18 15:55:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:28,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:28,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:28,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:28,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:28,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:28,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:55:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:28,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:28,943 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:28,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:55:28,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:28,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:28,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:28,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:28,989 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 25 treesize of output 3 [2022-01-18 15:55:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:29,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694944105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:29,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:29,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:55:29,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576259863] [2022-01-18 15:55:29,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:29,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:55:29,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:55:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:55:29,010 INFO L87 Difference]: Start difference. First operand 8694 states and 38665 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:30,150 INFO L93 Difference]: Finished difference Result 9697 states and 42531 transitions. [2022-01-18 15:55:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:55:30,150 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:30,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:30,173 INFO L225 Difference]: With dead ends: 9697 [2022-01-18 15:55:30,173 INFO L226 Difference]: Without dead ends: 9647 [2022-01-18 15:55:30,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:55:30,173 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 254 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 680 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:30,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 198 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2080 Invalid, 0 Unknown, 680 Unchecked, 0.8s Time] [2022-01-18 15:55:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9647 states. [2022-01-18 15:55:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9647 to 8659. [2022-01-18 15:55:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8659 states, 8658 states have (on average 4.45045045045045) internal successors, (38532), 8658 states have internal predecessors, (38532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8659 states to 8659 states and 38532 transitions. [2022-01-18 15:55:30,328 INFO L78 Accepts]: Start accepts. Automaton has 8659 states and 38532 transitions. Word has length 30 [2022-01-18 15:55:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:30,328 INFO L470 AbstractCegarLoop]: Abstraction has 8659 states and 38532 transitions. [2022-01-18 15:55:30,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 8659 states and 38532 transitions. [2022-01-18 15:55:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:30,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:30,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:30,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-01-18 15:55:30,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-01-18 15:55:30,559 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1006138418, now seen corresponding path program 6 times [2022-01-18 15:55:30,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:30,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505855197] [2022-01-18 15:55:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:30,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:30,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505855197] [2022-01-18 15:55:30,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505855197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10808824] [2022-01-18 15:55:30,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:55:30,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:30,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:30,702 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:30,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-01-18 15:55:30,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:55:30,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:30,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 15:55:30,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:31,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:31,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:31,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:31,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:31,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:55:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:31,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:31,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:31,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:31,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:31,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:31,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-01-18 15:55:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:31,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10808824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:31,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:31,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 31 [2022-01-18 15:55:31,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578770137] [2022-01-18 15:55:31,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:31,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:55:31,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:55:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:55:31,979 INFO L87 Difference]: Start difference. First operand 8659 states and 38532 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:34,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:34,624 INFO L93 Difference]: Finished difference Result 10661 states and 45939 transitions. [2022-01-18 15:55:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 15:55:34,624 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:34,649 INFO L225 Difference]: With dead ends: 10661 [2022-01-18 15:55:34,649 INFO L226 Difference]: Without dead ends: 10563 [2022-01-18 15:55:34,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=477, Invalid=3683, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 15:55:34,650 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 318 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 4290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1853 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:34,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 374 Invalid, 4290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2350 Invalid, 0 Unknown, 1853 Unchecked, 1.0s Time] [2022-01-18 15:55:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10563 states. [2022-01-18 15:55:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10563 to 8665. [2022-01-18 15:55:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8665 states, 8664 states have (on average 4.448868882733149) internal successors, (38545), 8664 states have internal predecessors, (38545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8665 states to 8665 states and 38545 transitions. [2022-01-18 15:55:34,814 INFO L78 Accepts]: Start accepts. Automaton has 8665 states and 38545 transitions. Word has length 30 [2022-01-18 15:55:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:34,815 INFO L470 AbstractCegarLoop]: Abstraction has 8665 states and 38545 transitions. [2022-01-18 15:55:34,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 8665 states and 38545 transitions. [2022-01-18 15:55:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:34,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:34,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:34,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:35,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:35,034 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:35,034 INFO L85 PathProgramCache]: Analyzing trace with hash -570301937, now seen corresponding path program 8 times [2022-01-18 15:55:35,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:35,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255856444] [2022-01-18 15:55:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:35,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:35,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:35,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255856444] [2022-01-18 15:55:35,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255856444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:35,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937683452] [2022-01-18 15:55:35,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:55:35,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:35,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:35,248 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:35,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-01-18 15:55:35,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:35,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:35,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:35,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:35,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:35,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:35,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:35,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:35,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:55:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:35,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:36,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:36,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:36,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:36,158 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:55:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:36,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937683452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:36,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:36,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:55:36,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631306768] [2022-01-18 15:55:36,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:36,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:55:36,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:36,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:55:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:55:36,189 INFO L87 Difference]: Start difference. First operand 8665 states and 38545 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:38,575 INFO L93 Difference]: Finished difference Result 11559 states and 49490 transitions. [2022-01-18 15:55:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 15:55:38,575 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:38,602 INFO L225 Difference]: With dead ends: 11559 [2022-01-18 15:55:38,602 INFO L226 Difference]: Without dead ends: 11539 [2022-01-18 15:55:38,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=533, Invalid=4297, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:55:38,603 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 426 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 2636 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 4236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1502 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:38,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 364 Invalid, 4236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2636 Invalid, 0 Unknown, 1502 Unchecked, 0.9s Time] [2022-01-18 15:55:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11539 states. [2022-01-18 15:55:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11539 to 8824. [2022-01-18 15:55:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8824 states, 8823 states have (on average 4.440213079451434) internal successors, (39176), 8823 states have internal predecessors, (39176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8824 states to 8824 states and 39176 transitions. [2022-01-18 15:55:38,771 INFO L78 Accepts]: Start accepts. Automaton has 8824 states and 39176 transitions. Word has length 30 [2022-01-18 15:55:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:38,771 INFO L470 AbstractCegarLoop]: Abstraction has 8824 states and 39176 transitions. [2022-01-18 15:55:38,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 8824 states and 39176 transitions. [2022-01-18 15:55:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:38,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:38,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:38,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:39,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:39,002 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:39,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash -541672786, now seen corresponding path program 2 times [2022-01-18 15:55:39,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:39,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483058899] [2022-01-18 15:55:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:39,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:39,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:39,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483058899] [2022-01-18 15:55:39,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483058899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:39,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846308150] [2022-01-18 15:55:39,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:55:39,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:39,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:39,185 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:39,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-01-18 15:55:39,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:39,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:39,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:39,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:39,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:39,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:39,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:39,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:39,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-01-18 15:55:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:39,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:40,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:40,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:40,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:40,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:40,278 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 47 treesize of output 7 [2022-01-18 15:55:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:40,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846308150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:40,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:40,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:55:40,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738462630] [2022-01-18 15:55:40,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:40,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:55:40,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:55:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:55:40,324 INFO L87 Difference]: Start difference. First operand 8824 states and 39176 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:43,256 INFO L93 Difference]: Finished difference Result 11479 states and 48918 transitions. [2022-01-18 15:55:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 15:55:43,256 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:43,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:43,331 INFO L225 Difference]: With dead ends: 11479 [2022-01-18 15:55:43,332 INFO L226 Difference]: Without dead ends: 11303 [2022-01-18 15:55:43,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=517, Invalid=4595, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 15:55:43,332 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 530 mSDsluCounter, 3325 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 6363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3233 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:43,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 439 Invalid, 6363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3001 Invalid, 0 Unknown, 3233 Unchecked, 1.2s Time] [2022-01-18 15:55:43,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11303 states. [2022-01-18 15:55:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11303 to 8770. [2022-01-18 15:55:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8770 states, 8769 states have (on average 4.43790626069107) internal successors, (38916), 8769 states have internal predecessors, (38916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8770 states to 8770 states and 38916 transitions. [2022-01-18 15:55:43,495 INFO L78 Accepts]: Start accepts. Automaton has 8770 states and 38916 transitions. Word has length 30 [2022-01-18 15:55:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:43,495 INFO L470 AbstractCegarLoop]: Abstraction has 8770 states and 38916 transitions. [2022-01-18 15:55:43,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 8770 states and 38916 transitions. [2022-01-18 15:55:43,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:43,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:43,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:43,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:43,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:43,726 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:43,727 INFO L85 PathProgramCache]: Analyzing trace with hash 603871680, now seen corresponding path program 3 times [2022-01-18 15:55:43,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:43,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924967905] [2022-01-18 15:55:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:43,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:43,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:43,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924967905] [2022-01-18 15:55:43,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924967905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:43,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791510372] [2022-01-18 15:55:43,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:55:43,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:43,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:43,873 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:43,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-01-18 15:55:43,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:55:43,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:43,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:43,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:44,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:44,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:44,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:44,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:44,227 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 [2022-01-18 15:55:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:44,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:44,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:44,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:44,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:44,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:44,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 7 [2022-01-18 15:55:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:44,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791510372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:44,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:44,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-01-18 15:55:44,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385581501] [2022-01-18 15:55:44,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:44,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 15:55:44,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:44,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 15:55:44,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:55:44,938 INFO L87 Difference]: Start difference. First operand 8770 states and 38916 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:47,169 INFO L93 Difference]: Finished difference Result 11284 states and 48184 transitions. [2022-01-18 15:55:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:55:47,169 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:47,196 INFO L225 Difference]: With dead ends: 11284 [2022-01-18 15:55:47,196 INFO L226 Difference]: Without dead ends: 11222 [2022-01-18 15:55:47,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=480, Invalid=3942, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 15:55:47,197 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 478 mSDsluCounter, 2137 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 4526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2630 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:47,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 336 Invalid, 4526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1782 Invalid, 0 Unknown, 2630 Unchecked, 0.8s Time] [2022-01-18 15:55:47,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11222 states. [2022-01-18 15:55:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11222 to 8763. [2022-01-18 15:55:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8763 states, 8762 states have (on average 4.439055010271628) internal successors, (38895), 8762 states have internal predecessors, (38895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8763 states to 8763 states and 38895 transitions. [2022-01-18 15:55:47,449 INFO L78 Accepts]: Start accepts. Automaton has 8763 states and 38895 transitions. Word has length 30 [2022-01-18 15:55:47,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:47,449 INFO L470 AbstractCegarLoop]: Abstraction has 8763 states and 38895 transitions. [2022-01-18 15:55:47,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 8763 states and 38895 transitions. [2022-01-18 15:55:47,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:47,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:47,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:47,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:47,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-01-18 15:55:47,679 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:47,680 INFO L85 PathProgramCache]: Analyzing trace with hash -567527281, now seen corresponding path program 9 times [2022-01-18 15:55:47,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:47,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799174127] [2022-01-18 15:55:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:47,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:47,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:47,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799174127] [2022-01-18 15:55:47,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799174127] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:47,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227055863] [2022-01-18 15:55:47,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:55:47,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:47,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:47,894 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:47,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-01-18 15:55:47,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:55:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:47,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:48,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:48,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:48,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:48,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:48,227 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 [2022-01-18 15:55:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:48,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:48,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:48,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:48,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:48,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:48,865 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 47 treesize of output 7 [2022-01-18 15:55:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:48,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227055863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:48,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:48,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:55:48,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55169212] [2022-01-18 15:55:48,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:48,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:55:48,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:48,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:55:48,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:55:48,903 INFO L87 Difference]: Start difference. First operand 8763 states and 38895 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:51,614 INFO L93 Difference]: Finished difference Result 12191 states and 51745 transitions. [2022-01-18 15:55:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:55:51,614 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:51,643 INFO L225 Difference]: With dead ends: 12191 [2022-01-18 15:55:51,643 INFO L226 Difference]: Without dead ends: 12017 [2022-01-18 15:55:51,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=478, Invalid=3812, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:55:51,644 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 464 mSDsluCounter, 2600 mSDsCounter, 0 mSdLazyCounter, 2830 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 5336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2355 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:51,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 430 Invalid, 5336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2830 Invalid, 0 Unknown, 2355 Unchecked, 1.2s Time] [2022-01-18 15:55:51,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12017 states. [2022-01-18 15:55:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12017 to 8766. [2022-01-18 15:55:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8766 states, 8765 states have (on average 4.4410724472333145) internal successors, (38926), 8765 states have internal predecessors, (38926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8766 states to 8766 states and 38926 transitions. [2022-01-18 15:55:51,822 INFO L78 Accepts]: Start accepts. Automaton has 8766 states and 38926 transitions. Word has length 30 [2022-01-18 15:55:51,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:51,822 INFO L470 AbstractCegarLoop]: Abstraction has 8766 states and 38926 transitions. [2022-01-18 15:55:51,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8766 states and 38926 transitions. [2022-01-18 15:55:51,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:51,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:51,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:51,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:52,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-01-18 15:55:52,052 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:52,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:52,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1073873547, now seen corresponding path program 10 times [2022-01-18 15:55:52,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:52,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851074410] [2022-01-18 15:55:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:52,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:52,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:52,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851074410] [2022-01-18 15:55:52,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851074410] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:52,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035276070] [2022-01-18 15:55:52,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:55:52,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:52,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:52,257 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:52,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-01-18 15:55:52,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:55:52,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:52,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:52,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:52,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:52,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:52,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:52,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:55:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:52,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:52,849 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:52,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:55:52,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:52,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:52,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:52,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:55:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:52,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035276070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:52,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:52,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:55:52,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846583173] [2022-01-18 15:55:52,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:52,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:55:52,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:52,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:55:52,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:55:52,900 INFO L87 Difference]: Start difference. First operand 8766 states and 38926 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:53,841 INFO L93 Difference]: Finished difference Result 9343 states and 41180 transitions. [2022-01-18 15:55:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:55:53,841 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:53,866 INFO L225 Difference]: With dead ends: 9343 [2022-01-18 15:55:53,866 INFO L226 Difference]: Without dead ends: 9316 [2022-01-18 15:55:53,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:55:53,867 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 174 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1839 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:53,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 195 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1839 Invalid, 0 Unknown, 258 Unchecked, 0.6s Time] [2022-01-18 15:55:53,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2022-01-18 15:55:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 8752. [2022-01-18 15:55:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8752 states, 8751 states have (on average 4.442235173123072) internal successors, (38874), 8751 states have internal predecessors, (38874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8752 states to 8752 states and 38874 transitions. [2022-01-18 15:55:54,034 INFO L78 Accepts]: Start accepts. Automaton has 8752 states and 38874 transitions. Word has length 30 [2022-01-18 15:55:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:54,035 INFO L470 AbstractCegarLoop]: Abstraction has 8752 states and 38874 transitions. [2022-01-18 15:55:54,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 8752 states and 38874 transitions. [2022-01-18 15:55:54,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:54,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:54,052 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, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:54,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-01-18 15:55:54,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-01-18 15:55:54,263 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:54,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:54,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2072652385, now seen corresponding path program 7 times [2022-01-18 15:55:54,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:54,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72797134] [2022-01-18 15:55:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:54,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:54,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:54,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72797134] [2022-01-18 15:55:54,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72797134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:54,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816797983] [2022-01-18 15:55:54,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:55:54,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:54,453 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:54,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-01-18 15:55:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:54,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:54,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:54,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:54,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:54,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:54,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 15:55:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:54,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:54,929 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:54,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:55:54,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:54,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:54,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:54,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:54,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:55:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:55,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816797983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:55,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:55,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-01-18 15:55:55,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398515234] [2022-01-18 15:55:55,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:55,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:55:55,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:55,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:55:55,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:55:55,002 INFO L87 Difference]: Start difference. First operand 8752 states and 38874 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2022-01-18 15:55:56,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:56,051 INFO L93 Difference]: Finished difference Result 9172 states and 40505 transitions. [2022-01-18 15:55:56,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:55:56,052 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 30 [2022-01-18 15:55:56,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:56,074 INFO L225 Difference]: With dead ends: 9172 [2022-01-18 15:55:56,074 INFO L226 Difference]: Without dead ends: 9127 [2022-01-18 15:55:56,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:55:56,074 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:56,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 129 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1872 Invalid, 0 Unknown, 90 Unchecked, 0.7s Time] [2022-01-18 15:55:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9127 states. [2022-01-18 15:55:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9127 to 8755. [2022-01-18 15:55:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8755 states, 8754 states have (on average 4.441740918437286) internal successors, (38883), 8754 states have internal predecessors, (38883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8755 states to 8755 states and 38883 transitions. [2022-01-18 15:55:56,226 INFO L78 Accepts]: Start accepts. Automaton has 8755 states and 38883 transitions. Word has length 30 [2022-01-18 15:55:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:56,226 INFO L470 AbstractCegarLoop]: Abstraction has 8755 states and 38883 transitions. [2022-01-18 15:55:56,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2022-01-18 15:55:56,226 INFO L276 IsEmpty]: Start isEmpty. Operand 8755 states and 38883 transitions. [2022-01-18 15:55:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:56,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:56,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:56,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-01-18 15:55:56,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-01-18 15:55:56,457 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:56,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1825043014, now seen corresponding path program 37 times [2022-01-18 15:55:56,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:56,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519181517] [2022-01-18 15:55:56,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:56,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:56,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:56,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519181517] [2022-01-18 15:55:56,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519181517] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:56,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963204279] [2022-01-18 15:55:56,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:55:56,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:56,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:56,620 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:56,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-01-18 15:55:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:56,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:56,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:56,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:56,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:56,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:55:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:56,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:57,075 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:55:57,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:55:57,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:57,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:57,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:57,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:57,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:55:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:57,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963204279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:57,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:57,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-01-18 15:55:57,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829865917] [2022-01-18 15:55:57,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:57,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:55:57,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:57,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:55:57,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:55:57,122 INFO L87 Difference]: Start difference. First operand 8755 states and 38883 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:57,823 INFO L93 Difference]: Finished difference Result 9307 states and 41037 transitions. [2022-01-18 15:55:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:55:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:55:57,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:57,845 INFO L225 Difference]: With dead ends: 9307 [2022-01-18 15:55:57,845 INFO L226 Difference]: Without dead ends: 9232 [2022-01-18 15:55:57,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:55:57,845 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 154 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:57,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 129 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1335 Invalid, 0 Unknown, 381 Unchecked, 0.4s Time] [2022-01-18 15:55:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9232 states. [2022-01-18 15:55:57,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9232 to 8773. [2022-01-18 15:55:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8773 states, 8772 states have (on average 4.441062471500228) internal successors, (38957), 8772 states have internal predecessors, (38957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8773 states to 8773 states and 38957 transitions. [2022-01-18 15:55:57,997 INFO L78 Accepts]: Start accepts. Automaton has 8773 states and 38957 transitions. Word has length 30 [2022-01-18 15:55:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:57,997 INFO L470 AbstractCegarLoop]: Abstraction has 8773 states and 38957 transitions. [2022-01-18 15:55:57,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 8773 states and 38957 transitions. [2022-01-18 15:55:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:55:58,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:58,013 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:58,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-01-18 15:55:58,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2022-01-18 15:55:58,228 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:55:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2061595834, now seen corresponding path program 38 times [2022-01-18 15:55:58,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:58,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344227841] [2022-01-18 15:55:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:58,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:58,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:58,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344227841] [2022-01-18 15:55:58,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344227841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:58,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272894069] [2022-01-18 15:55:58,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:55:58,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:58,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:58,374 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:58,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-01-18 15:55:58,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:58,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:58,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:55:58,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:58,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:58,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:58,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:58,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2022-01-18 15:55:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:58,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:59,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:55:59,022 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:55:59,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:55:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:59,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272894069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:59,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:59,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-01-18 15:55:59,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247070020] [2022-01-18 15:55:59,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:59,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:55:59,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:55:59,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:55:59,097 INFO L87 Difference]: Start difference. First operand 8773 states and 38957 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) [2022-01-18 15:56:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:00,066 INFO L93 Difference]: Finished difference Result 9427 states and 41519 transitions. [2022-01-18 15:56:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:56:00,066 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 30 [2022-01-18 15:56:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:00,088 INFO L225 Difference]: With dead ends: 9427 [2022-01-18 15:56:00,089 INFO L226 Difference]: Without dead ends: 9362 [2022-01-18 15:56:00,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:56:00,089 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 650 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:00,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 138 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1801 Invalid, 0 Unknown, 650 Unchecked, 0.6s Time] [2022-01-18 15:56:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9362 states. [2022-01-18 15:56:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9362 to 8807. [2022-01-18 15:56:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8807 states, 8806 states have (on average 4.437883261412673) internal successors, (39080), 8806 states have internal predecessors, (39080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8807 states to 8807 states and 39080 transitions. [2022-01-18 15:56:00,316 INFO L78 Accepts]: Start accepts. Automaton has 8807 states and 39080 transitions. Word has length 30 [2022-01-18 15:56:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:00,316 INFO L470 AbstractCegarLoop]: Abstraction has 8807 states and 39080 transitions. [2022-01-18 15:56:00,316 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) [2022-01-18 15:56:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 8807 states and 39080 transitions. [2022-01-18 15:56:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:00,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:00,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:00,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:00,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:00,539 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:00,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1240699496, now seen corresponding path program 39 times [2022-01-18 15:56:00,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:00,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179830620] [2022-01-18 15:56:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:00,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:00,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179830620] [2022-01-18 15:56:00,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179830620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787649875] [2022-01-18 15:56:00,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:00,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:00,751 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:00,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-01-18 15:56:00,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:56:00,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:56:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:01,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:01,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:01,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:01,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:01,047 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 26 treesize of output 16 [2022-01-18 15:56:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:01,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:01,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:01,405 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:56:01,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:56:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:01,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787649875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:01,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:01,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-18 15:56:01,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558590585] [2022-01-18 15:56:01,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:01,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:56:01,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:56:01,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:56:01,484 INFO L87 Difference]: Start difference. First operand 8807 states and 39080 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 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) [2022-01-18 15:56:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:02,756 INFO L93 Difference]: Finished difference Result 9097 states and 40106 transitions. [2022-01-18 15:56:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:56:02,756 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 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 30 [2022-01-18 15:56:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:02,778 INFO L225 Difference]: With dead ends: 9097 [2022-01-18 15:56:02,778 INFO L226 Difference]: Without dead ends: 9048 [2022-01-18 15:56:02,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:56:02,779 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 178 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:02,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 141 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1875 Invalid, 0 Unknown, 380 Unchecked, 0.8s Time] [2022-01-18 15:56:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9048 states. [2022-01-18 15:56:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9048 to 8805. [2022-01-18 15:56:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8805 states, 8804 states have (on average 4.4379827351204) internal successors, (39072), 8804 states have internal predecessors, (39072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8805 states to 8805 states and 39072 transitions. [2022-01-18 15:56:02,931 INFO L78 Accepts]: Start accepts. Automaton has 8805 states and 39072 transitions. Word has length 30 [2022-01-18 15:56:02,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:02,931 INFO L470 AbstractCegarLoop]: Abstraction has 8805 states and 39072 transitions. [2022-01-18 15:56:02,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 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) [2022-01-18 15:56:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 8805 states and 39072 transitions. [2022-01-18 15:56:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:02,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:02,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:02,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:03,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:03,155 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:03,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1307452366, now seen corresponding path program 40 times [2022-01-18 15:56:03,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:03,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783928230] [2022-01-18 15:56:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:03,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:03,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:03,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783928230] [2022-01-18 15:56:03,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783928230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:03,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554121508] [2022-01-18 15:56:03,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:03,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:03,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:03,409 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:03,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-01-18 15:56:03,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:03,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:03,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:56:03,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:03,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:03,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:03,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:03,680 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 15:56:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:03,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:04,022 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:56:04,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:56:04,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:04,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:04,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:04,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:56:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:04,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554121508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:04,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:04,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-01-18 15:56:04,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569389797] [2022-01-18 15:56:04,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:04,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:56:04,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:04,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:56:04,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:56:04,113 INFO L87 Difference]: Start difference. First operand 8805 states and 39072 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) [2022-01-18 15:56:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:05,492 INFO L93 Difference]: Finished difference Result 9200 states and 40559 transitions. [2022-01-18 15:56:05,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:56:05,492 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 30 [2022-01-18 15:56:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:05,513 INFO L225 Difference]: With dead ends: 9200 [2022-01-18 15:56:05,513 INFO L226 Difference]: Without dead ends: 9158 [2022-01-18 15:56:05,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:56:05,513 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:05,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 157 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2312 Invalid, 0 Unknown, 512 Unchecked, 1.0s Time] [2022-01-18 15:56:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9158 states. [2022-01-18 15:56:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9158 to 8811. [2022-01-18 15:56:05,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.438138479001135) internal successors, (39100), 8810 states have internal predecessors, (39100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 39100 transitions. [2022-01-18 15:56:05,657 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 39100 transitions. Word has length 30 [2022-01-18 15:56:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:05,657 INFO L470 AbstractCegarLoop]: Abstraction has 8811 states and 39100 transitions. [2022-01-18 15:56:05,657 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) [2022-01-18 15:56:05,657 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 39100 transitions. [2022-01-18 15:56:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:05,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:05,673 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:05,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:05,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:05,882 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:05,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:05,882 INFO L85 PathProgramCache]: Analyzing trace with hash 46749460, now seen corresponding path program 41 times [2022-01-18 15:56:05,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:05,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110475160] [2022-01-18 15:56:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:05,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:06,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:06,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110475160] [2022-01-18 15:56:06,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110475160] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:06,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265211961] [2022-01-18 15:56:06,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:06,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:06,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:06,092 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:06,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-01-18 15:56:06,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:06,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:06,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:56:06,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:06,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:06,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:06,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:06,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:56:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:06,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:06,555 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:56:06,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:56:06,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:06,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:06,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:06,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:06,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:56:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:06,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265211961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:06,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:06,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:56:06,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965027948] [2022-01-18 15:56:06,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:06,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:56:06,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:06,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:56:06,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:56:06,610 INFO L87 Difference]: Start difference. First operand 8811 states and 39100 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:07,343 INFO L93 Difference]: Finished difference Result 9349 states and 41187 transitions. [2022-01-18 15:56:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:56:07,343 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:07,365 INFO L225 Difference]: With dead ends: 9349 [2022-01-18 15:56:07,366 INFO L226 Difference]: Without dead ends: 9304 [2022-01-18 15:56:07,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:56:07,366 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 220 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:07,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 153 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1478 Invalid, 0 Unknown, 532 Unchecked, 0.5s Time] [2022-01-18 15:56:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9304 states. [2022-01-18 15:56:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9304 to 8797. [2022-01-18 15:56:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8797 states, 8796 states have (on average 4.438949522510232) internal successors, (39045), 8796 states have internal predecessors, (39045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8797 states to 8797 states and 39045 transitions. [2022-01-18 15:56:07,516 INFO L78 Accepts]: Start accepts. Automaton has 8797 states and 39045 transitions. Word has length 30 [2022-01-18 15:56:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:07,516 INFO L470 AbstractCegarLoop]: Abstraction has 8797 states and 39045 transitions. [2022-01-18 15:56:07,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 8797 states and 39045 transitions. [2022-01-18 15:56:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:07,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:07,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:07,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:07,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:07,745 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:07,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:07,745 INFO L85 PathProgramCache]: Analyzing trace with hash -869005214, now seen corresponding path program 7 times [2022-01-18 15:56:07,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:07,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522785145] [2022-01-18 15:56:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:07,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:07,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:07,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522785145] [2022-01-18 15:56:07,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522785145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:07,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846288072] [2022-01-18 15:56:07,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:56:07,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:07,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:07,937 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:07,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-01-18 15:56:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:56:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:08,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:08,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:08,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:08,215 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 30 treesize of output 16 [2022-01-18 15:56:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:08,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:08,516 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:56:08,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:56:08,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:08,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:08,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:08,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:56:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:08,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846288072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:08,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:08,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-01-18 15:56:08,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871538675] [2022-01-18 15:56:08,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:08,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:56:08,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:08,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:56:08,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:56:08,592 INFO L87 Difference]: Start difference. First operand 8797 states and 39045 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2022-01-18 15:56:09,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:09,634 INFO L93 Difference]: Finished difference Result 9243 states and 40793 transitions. [2022-01-18 15:56:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:56:09,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 30 [2022-01-18 15:56:09,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:09,655 INFO L225 Difference]: With dead ends: 9243 [2022-01-18 15:56:09,656 INFO L226 Difference]: Without dead ends: 9196 [2022-01-18 15:56:09,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:56:09,656 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:09,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 122 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1769 Invalid, 0 Unknown, 27 Unchecked, 0.7s Time] [2022-01-18 15:56:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2022-01-18 15:56:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 8804. [2022-01-18 15:56:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8804 states, 8803 states have (on average 4.438941270021584) internal successors, (39076), 8803 states have internal predecessors, (39076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8804 states to 8804 states and 39076 transitions. [2022-01-18 15:56:09,804 INFO L78 Accepts]: Start accepts. Automaton has 8804 states and 39076 transitions. Word has length 30 [2022-01-18 15:56:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:09,804 INFO L470 AbstractCegarLoop]: Abstraction has 8804 states and 39076 transitions. [2022-01-18 15:56:09,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2022-01-18 15:56:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8804 states and 39076 transitions. [2022-01-18 15:56:09,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:09,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:09,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:09,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:10,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:10,025 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1116614585, now seen corresponding path program 11 times [2022-01-18 15:56:10,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:10,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947492391] [2022-01-18 15:56:10,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:10,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:10,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:10,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947492391] [2022-01-18 15:56:10,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947492391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:10,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88574185] [2022-01-18 15:56:10,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:10,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:10,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:10,245 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:10,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-01-18 15:56:10,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:10,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:10,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:56:10,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:10,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:10,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:10,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:10,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-01-18 15:56:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:10,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:10,853 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:56:10,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:56:10,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:10,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:10,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:10,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:10,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:56:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:10,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88574185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:10,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:10,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-01-18 15:56:10,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68495221] [2022-01-18 15:56:10,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:10,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:56:10,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:10,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:56:10,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:56:10,934 INFO L87 Difference]: Start difference. First operand 8804 states and 39076 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:11,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:11,764 INFO L93 Difference]: Finished difference Result 9412 states and 41423 transitions. [2022-01-18 15:56:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:56:11,764 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:11,786 INFO L225 Difference]: With dead ends: 9412 [2022-01-18 15:56:11,787 INFO L226 Difference]: Without dead ends: 9337 [2022-01-18 15:56:11,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:56:11,787 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:11,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 127 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1781 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-01-18 15:56:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9337 states. [2022-01-18 15:56:11,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9337 to 8803. [2022-01-18 15:56:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8803 states, 8802 states have (on average 4.438650306748467) internal successors, (39069), 8802 states have internal predecessors, (39069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8803 states to 8803 states and 39069 transitions. [2022-01-18 15:56:11,939 INFO L78 Accepts]: Start accepts. Automaton has 8803 states and 39069 transitions. Word has length 30 [2022-01-18 15:56:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:11,939 INFO L470 AbstractCegarLoop]: Abstraction has 8803 states and 39069 transitions. [2022-01-18 15:56:11,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 8803 states and 39069 transitions. [2022-01-18 15:56:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:11,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:11,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:11,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:12,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:12,165 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash -708286137, now seen corresponding path program 12 times [2022-01-18 15:56:12,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:12,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888747559] [2022-01-18 15:56:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:12,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:12,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:12,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888747559] [2022-01-18 15:56:12,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888747559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:12,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908458334] [2022-01-18 15:56:12,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:56:12,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:12,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:12,347 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:12,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-01-18 15:56:12,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:56:12,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:12,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:56:12,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:12,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:12,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:12,657 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-01-18 15:56:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:12,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:12,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:12,943 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:56:12,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:56:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:13,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908458334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:13,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:13,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-01-18 15:56:13,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727898661] [2022-01-18 15:56:13,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:13,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:56:13,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:56:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:56:13,030 INFO L87 Difference]: Start difference. First operand 8803 states and 39069 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) [2022-01-18 15:56:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:14,142 INFO L93 Difference]: Finished difference Result 9321 states and 41081 transitions. [2022-01-18 15:56:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:56:14,143 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 30 [2022-01-18 15:56:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:14,172 INFO L225 Difference]: With dead ends: 9321 [2022-01-18 15:56:14,173 INFO L226 Difference]: Without dead ends: 9283 [2022-01-18 15:56:14,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:56:14,173 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 505 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:14,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 143 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1841 Invalid, 0 Unknown, 505 Unchecked, 0.6s Time] [2022-01-18 15:56:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9283 states. [2022-01-18 15:56:14,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9283 to 8801. [2022-01-18 15:56:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8801 states, 8800 states have (on average 4.43875) internal successors, (39061), 8800 states have internal predecessors, (39061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8801 states to 8801 states and 39061 transitions. [2022-01-18 15:56:14,373 INFO L78 Accepts]: Start accepts. Automaton has 8801 states and 39061 transitions. Word has length 30 [2022-01-18 15:56:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:14,374 INFO L470 AbstractCegarLoop]: Abstraction has 8801 states and 39061 transitions. [2022-01-18 15:56:14,374 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) [2022-01-18 15:56:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 8801 states and 39061 transitions. [2022-01-18 15:56:14,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:14,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:14,394 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:14,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:14,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:14,614 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:14,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:14,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1400059157, now seen corresponding path program 13 times [2022-01-18 15:56:14,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:14,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265818320] [2022-01-18 15:56:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:14,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:14,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265818320] [2022-01-18 15:56:14,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265818320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759897155] [2022-01-18 15:56:14,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:56:14,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:14,750 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:14,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-01-18 15:56:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:14,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:56:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:14,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:14,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:14,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:56:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:15,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:15,208 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:56:15,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:56:15,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:15,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:15,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:15,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:15,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:56:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:15,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759897155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:15,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:15,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:56:15,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499285840] [2022-01-18 15:56:15,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:15,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:56:15,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:15,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:56:15,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:56:15,255 INFO L87 Difference]: Start difference. First operand 8801 states and 39061 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:16,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:16,144 INFO L93 Difference]: Finished difference Result 9388 states and 41343 transitions. [2022-01-18 15:56:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:56:16,145 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:16,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:16,169 INFO L225 Difference]: With dead ends: 9388 [2022-01-18 15:56:16,169 INFO L226 Difference]: Without dead ends: 9345 [2022-01-18 15:56:16,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:56:16,170 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 196 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:16,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 174 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2182 Invalid, 0 Unknown, 396 Unchecked, 0.6s Time] [2022-01-18 15:56:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9345 states. [2022-01-18 15:56:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9345 to 8789. [2022-01-18 15:56:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8789 states, 8788 states have (on average 4.439462903959946) internal successors, (39014), 8788 states have internal predecessors, (39014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8789 states to 8789 states and 39014 transitions. [2022-01-18 15:56:16,354 INFO L78 Accepts]: Start accepts. Automaton has 8789 states and 39014 transitions. Word has length 30 [2022-01-18 15:56:16,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:16,354 INFO L470 AbstractCegarLoop]: Abstraction has 8789 states and 39014 transitions. [2022-01-18 15:56:16,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:16,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8789 states and 39014 transitions. [2022-01-18 15:56:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:16,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:16,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:16,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:16,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-01-18 15:56:16,587 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:16,587 INFO L85 PathProgramCache]: Analyzing trace with hash 973328899, now seen corresponding path program 8 times [2022-01-18 15:56:16,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:16,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620772195] [2022-01-18 15:56:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:16,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:16,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:16,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620772195] [2022-01-18 15:56:16,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620772195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:16,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970525411] [2022-01-18 15:56:16,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:56:16,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:16,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:16,850 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:16,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-01-18 15:56:16,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:16,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:16,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:56:16,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:17,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:17,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:17,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:17,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-01-18 15:56:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:17,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:17,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:17,720 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:56:17,721 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:56:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:17,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970525411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:17,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:17,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 15:56:17,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661980298] [2022-01-18 15:56:17,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:17,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:56:17,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:17,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:56:17,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:56:17,874 INFO L87 Difference]: Start difference. First operand 8789 states and 39014 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) [2022-01-18 15:56:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:19,372 INFO L93 Difference]: Finished difference Result 9247 states and 40785 transitions. [2022-01-18 15:56:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:56:19,372 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 30 [2022-01-18 15:56:19,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:19,394 INFO L225 Difference]: With dead ends: 9247 [2022-01-18 15:56:19,394 INFO L226 Difference]: Without dead ends: 9214 [2022-01-18 15:56:19,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=201, Invalid=1779, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:56:19,394 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 849 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:19,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 132 Invalid, 2675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1761 Invalid, 0 Unknown, 849 Unchecked, 0.7s Time] [2022-01-18 15:56:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2022-01-18 15:56:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 8830. [2022-01-18 15:56:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8830 states, 8829 states have (on average 4.436176237399479) internal successors, (39167), 8829 states have internal predecessors, (39167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8830 states to 8830 states and 39167 transitions. [2022-01-18 15:56:19,546 INFO L78 Accepts]: Start accepts. Automaton has 8830 states and 39167 transitions. Word has length 30 [2022-01-18 15:56:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:19,547 INFO L470 AbstractCegarLoop]: Abstraction has 8830 states and 39167 transitions. [2022-01-18 15:56:19,547 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) [2022-01-18 15:56:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 8830 states and 39167 transitions. [2022-01-18 15:56:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:19,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:19,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:19,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:19,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-01-18 15:56:19,777 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:19,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:19,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1860832580, now seen corresponding path program 8 times [2022-01-18 15:56:19,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:19,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812472954] [2022-01-18 15:56:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:19,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:20,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:20,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812472954] [2022-01-18 15:56:20,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812472954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:20,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473945411] [2022-01-18 15:56:20,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:56:20,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:20,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:20,010 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:20,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-01-18 15:56:20,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:20,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:56:20,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:20,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:20,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:20,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:20,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-01-18 15:56:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:20,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:20,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:20,838 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:56:20,839 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:56:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:21,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473945411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:21,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:21,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-01-18 15:56:21,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513199319] [2022-01-18 15:56:21,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:21,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:56:21,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:21,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:56:21,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:56:21,006 INFO L87 Difference]: Start difference. First operand 8830 states and 39167 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) [2022-01-18 15:56:22,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:22,686 INFO L93 Difference]: Finished difference Result 9309 states and 41003 transitions. [2022-01-18 15:56:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:56:22,686 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 30 [2022-01-18 15:56:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:22,708 INFO L225 Difference]: With dead ends: 9309 [2022-01-18 15:56:22,708 INFO L226 Difference]: Without dead ends: 9228 [2022-01-18 15:56:22,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:56:22,709 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 198 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 786 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:22,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 158 Invalid, 2882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2024 Invalid, 0 Unknown, 786 Unchecked, 0.8s Time] [2022-01-18 15:56:22,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9228 states. [2022-01-18 15:56:22,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9228 to 8781. [2022-01-18 15:56:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8781 states, 8780 states have (on average 4.438610478359909) internal successors, (38971), 8780 states have internal predecessors, (38971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8781 states to 8781 states and 38971 transitions. [2022-01-18 15:56:22,918 INFO L78 Accepts]: Start accepts. Automaton has 8781 states and 38971 transitions. Word has length 30 [2022-01-18 15:56:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:22,918 INFO L470 AbstractCegarLoop]: Abstraction has 8781 states and 38971 transitions. [2022-01-18 15:56:22,918 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) [2022-01-18 15:56:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8781 states and 38971 transitions. [2022-01-18 15:56:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:22,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:22,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:22,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:23,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-01-18 15:56:23,148 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash 484389789, now seen corresponding path program 9 times [2022-01-18 15:56:23,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:23,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883072201] [2022-01-18 15:56:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:23,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:23,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:23,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883072201] [2022-01-18 15:56:23,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883072201] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:23,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199644447] [2022-01-18 15:56:23,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:23,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:23,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:23,387 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:23,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-01-18 15:56:23,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:56:23,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:23,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:56:23,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:23,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:23,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:23,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:23,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 38 [2022-01-18 15:56:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:24,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:24,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:24,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:24,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:24,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 65 [2022-01-18 15:56:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:24,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199644447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:24,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:24,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-01-18 15:56:24,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726645169] [2022-01-18 15:56:24,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:24,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 15:56:24,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 15:56:24,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:56:24,635 INFO L87 Difference]: Start difference. First operand 8781 states and 38971 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:29,380 INFO L93 Difference]: Finished difference Result 11081 states and 47966 transitions. [2022-01-18 15:56:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 15:56:29,380 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:29,458 INFO L225 Difference]: With dead ends: 11081 [2022-01-18 15:56:29,459 INFO L226 Difference]: Without dead ends: 10802 [2022-01-18 15:56:29,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=896, Invalid=5910, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 15:56:29,459 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 436 mSDsluCounter, 2422 mSDsCounter, 0 mSdLazyCounter, 2920 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 5625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2575 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:29,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 272 Invalid, 5625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2920 Invalid, 0 Unknown, 2575 Unchecked, 1.3s Time] [2022-01-18 15:56:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10802 states. [2022-01-18 15:56:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10802 to 8785. [2022-01-18 15:56:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8785 states, 8784 states have (on average 4.438410746812386) internal successors, (38987), 8784 states have internal predecessors, (38987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8785 states to 8785 states and 38987 transitions. [2022-01-18 15:56:29,612 INFO L78 Accepts]: Start accepts. Automaton has 8785 states and 38987 transitions. Word has length 30 [2022-01-18 15:56:29,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:29,612 INFO L470 AbstractCegarLoop]: Abstraction has 8785 states and 38987 transitions. [2022-01-18 15:56:29,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:29,612 INFO L276 IsEmpty]: Start isEmpty. Operand 8785 states and 38987 transitions. [2022-01-18 15:56:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:29,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:29,628 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:29,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:29,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:29,840 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:29,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:29,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1622154599, now seen corresponding path program 10 times [2022-01-18 15:56:29,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:29,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622027736] [2022-01-18 15:56:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:29,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:30,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:30,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622027736] [2022-01-18 15:56:30,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622027736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:30,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817222397] [2022-01-18 15:56:30,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:56:30,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:30,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:30,053 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:30,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-01-18 15:56:30,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:56:30,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:30,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:56:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:30,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:30,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:30,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2022-01-18 15:56:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:30,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:30,482 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:56:30,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:56:30,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:30,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:30,522 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 25 treesize of output 3 [2022-01-18 15:56:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:30,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817222397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:30,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:30,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-01-18 15:56:30,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127387930] [2022-01-18 15:56:30,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:30,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:56:30,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:30,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:56:30,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:56:30,537 INFO L87 Difference]: Start difference. First operand 8785 states and 38987 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:31,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:31,421 INFO L93 Difference]: Finished difference Result 9271 states and 40869 transitions. [2022-01-18 15:56:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:56:31,421 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:31,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:31,443 INFO L225 Difference]: With dead ends: 9271 [2022-01-18 15:56:31,443 INFO L226 Difference]: Without dead ends: 9188 [2022-01-18 15:56:31,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:56:31,444 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 140 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 626 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:31,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 135 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1870 Invalid, 0 Unknown, 626 Unchecked, 0.6s Time] [2022-01-18 15:56:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9188 states. [2022-01-18 15:56:31,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9188 to 8772. [2022-01-18 15:56:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8772 states, 8771 states have (on average 4.438490479990879) internal successors, (38930), 8771 states have internal predecessors, (38930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8772 states to 8772 states and 38930 transitions. [2022-01-18 15:56:31,593 INFO L78 Accepts]: Start accepts. Automaton has 8772 states and 38930 transitions. Word has length 30 [2022-01-18 15:56:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:31,593 INFO L470 AbstractCegarLoop]: Abstraction has 8772 states and 38930 transitions. [2022-01-18 15:56:31,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 8772 states and 38930 transitions. [2022-01-18 15:56:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:31,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:31,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:31,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-01-18 15:56:31,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:31,824 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:31,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1648493031, now seen corresponding path program 11 times [2022-01-18 15:56:31,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:31,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250800212] [2022-01-18 15:56:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:31,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:32,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:32,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250800212] [2022-01-18 15:56:32,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250800212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:32,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651548047] [2022-01-18 15:56:32,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:32,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:32,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:32,032 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:32,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-01-18 15:56:32,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:56:32,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:32,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:56:32,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:32,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:32,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:32,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:56:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:32,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:32,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:32,807 INFO L353 Elim1Store]: treesize reduction 18, result has 68.4 percent of original size [2022-01-18 15:56:32,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 58 [2022-01-18 15:56:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:32,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651548047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:32,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:32,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-01-18 15:56:32,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638239423] [2022-01-18 15:56:32,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:32,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:56:32,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:32,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:56:32,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:56:32,942 INFO L87 Difference]: Start difference. First operand 8772 states and 38930 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) [2022-01-18 15:56:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:34,829 INFO L93 Difference]: Finished difference Result 9484 states and 41706 transitions. [2022-01-18 15:56:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:56:34,829 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 30 [2022-01-18 15:56:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:34,852 INFO L225 Difference]: With dead ends: 9484 [2022-01-18 15:56:34,852 INFO L226 Difference]: Without dead ends: 9451 [2022-01-18 15:56:34,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 15:56:34,852 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 302 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:34,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 174 Invalid, 3293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2414 Invalid, 0 Unknown, 732 Unchecked, 0.9s Time] [2022-01-18 15:56:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2022-01-18 15:56:34,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 8816. [2022-01-18 15:56:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8816 states, 8815 states have (on average 4.435961429381735) internal successors, (39103), 8815 states have internal predecessors, (39103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:35,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8816 states to 8816 states and 39103 transitions. [2022-01-18 15:56:35,006 INFO L78 Accepts]: Start accepts. Automaton has 8816 states and 39103 transitions. Word has length 30 [2022-01-18 15:56:35,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:35,006 INFO L470 AbstractCegarLoop]: Abstraction has 8816 states and 39103 transitions. [2022-01-18 15:56:35,006 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) [2022-01-18 15:56:35,006 INFO L276 IsEmpty]: Start isEmpty. Operand 8816 states and 39103 transitions. [2022-01-18 15:56:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:35,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:35,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:35,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:35,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:35,237 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:35,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1519410312, now seen corresponding path program 9 times [2022-01-18 15:56:35,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:35,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060160327] [2022-01-18 15:56:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:35,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:35,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060160327] [2022-01-18 15:56:35,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060160327] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510643038] [2022-01-18 15:56:35,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:56:35,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:35,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:35,457 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:35,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-01-18 15:56:35,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:56:35,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:56:35,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:35,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:35,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:35,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:35,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-01-18 15:56:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:36,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:36,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:36,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:36,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:36,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2022-01-18 15:56:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:36,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510643038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:36,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:36,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-01-18 15:56:36,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416119636] [2022-01-18 15:56:36,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:36,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 15:56:36,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:36,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 15:56:36,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:56:36,657 INFO L87 Difference]: Start difference. First operand 8816 states and 39103 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:40,727 INFO L93 Difference]: Finished difference Result 11715 states and 50309 transitions. [2022-01-18 15:56:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 15:56:40,727 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:40,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:40,754 INFO L225 Difference]: With dead ends: 11715 [2022-01-18 15:56:40,754 INFO L226 Difference]: Without dead ends: 11352 [2022-01-18 15:56:40,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1030, Invalid=6110, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 15:56:40,755 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 400 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 4575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2845 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:40,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 358 Invalid, 4575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1613 Invalid, 0 Unknown, 2845 Unchecked, 0.8s Time] [2022-01-18 15:56:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11352 states. [2022-01-18 15:56:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11352 to 8877. [2022-01-18 15:56:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8877 states, 8876 states have (on average 4.450202794051375) internal successors, (39500), 8876 states have internal predecessors, (39500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8877 states to 8877 states and 39500 transitions. [2022-01-18 15:56:40,929 INFO L78 Accepts]: Start accepts. Automaton has 8877 states and 39500 transitions. Word has length 30 [2022-01-18 15:56:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:40,929 INFO L470 AbstractCegarLoop]: Abstraction has 8877 states and 39500 transitions. [2022-01-18 15:56:40,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 8877 states and 39500 transitions. [2022-01-18 15:56:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:40,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:40,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:40,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:41,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:41,160 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:41,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1926109091, now seen corresponding path program 5 times [2022-01-18 15:56:41,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:41,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920184537] [2022-01-18 15:56:41,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:41,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:41,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:41,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920184537] [2022-01-18 15:56:41,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920184537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:41,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55983009] [2022-01-18 15:56:41,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:41,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:41,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:41,360 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:41,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-01-18 15:56:41,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:41,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:41,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:56:41,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:41,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:41,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:41,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:41,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-01-18 15:56:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:41,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:41,923 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:56:41,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:56:41,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:41,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:41,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:41,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:56:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:41,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55983009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:41,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:41,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:56:41,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414394386] [2022-01-18 15:56:41,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:41,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:56:41,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:56:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:56:41,987 INFO L87 Difference]: Start difference. First operand 8877 states and 39500 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:42,689 INFO L93 Difference]: Finished difference Result 9571 states and 42155 transitions. [2022-01-18 15:56:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:56:42,689 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:42,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:42,714 INFO L225 Difference]: With dead ends: 9571 [2022-01-18 15:56:42,714 INFO L226 Difference]: Without dead ends: 9517 [2022-01-18 15:56:42,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:56:42,714 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 256 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 803 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:42,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 153 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1390 Invalid, 0 Unknown, 803 Unchecked, 0.4s Time] [2022-01-18 15:56:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9517 states. [2022-01-18 15:56:42,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9517 to 8781. [2022-01-18 15:56:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8781 states, 8780 states have (on average 4.459339407744875) internal successors, (39153), 8780 states have internal predecessors, (39153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8781 states to 8781 states and 39153 transitions. [2022-01-18 15:56:42,882 INFO L78 Accepts]: Start accepts. Automaton has 8781 states and 39153 transitions. Word has length 30 [2022-01-18 15:56:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:42,882 INFO L470 AbstractCegarLoop]: Abstraction has 8781 states and 39153 transitions. [2022-01-18 15:56:42,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 8781 states and 39153 transitions. [2022-01-18 15:56:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:42,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:42,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:42,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Ended with exit code 0 [2022-01-18 15:56:43,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:43,099 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:43,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:43,100 INFO L85 PathProgramCache]: Analyzing trace with hash 691112978, now seen corresponding path program 42 times [2022-01-18 15:56:43,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:43,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199905159] [2022-01-18 15:56:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:43,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:43,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:43,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199905159] [2022-01-18 15:56:43,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199905159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:43,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086569656] [2022-01-18 15:56:43,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:56:43,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:43,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:43,252 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:43,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-01-18 15:56:43,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:56:43,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:43,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:56:43,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:43,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:43,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:43,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:56:43,576 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 35 treesize of output 47 [2022-01-18 15:56:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:43,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:44,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:44,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:44,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:44,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:44,041 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 47 treesize of output 7 [2022-01-18 15:56:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:44,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086569656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:44,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:44,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-01-18 15:56:44,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755093428] [2022-01-18 15:56:44,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:44,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 15:56:44,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:44,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 15:56:44,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:56:44,070 INFO L87 Difference]: Start difference. First operand 8781 states and 39153 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:47,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:47,087 INFO L93 Difference]: Finished difference Result 11138 states and 48054 transitions. [2022-01-18 15:56:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 15:56:47,087 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:47,115 INFO L225 Difference]: With dead ends: 11138 [2022-01-18 15:56:47,115 INFO L226 Difference]: Without dead ends: 11060 [2022-01-18 15:56:47,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=522, Invalid=4448, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 15:56:47,116 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 505 mSDsluCounter, 2519 mSDsCounter, 0 mSdLazyCounter, 2836 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 5014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2064 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:47,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 384 Invalid, 5014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2836 Invalid, 0 Unknown, 2064 Unchecked, 1.2s Time] [2022-01-18 15:56:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11060 states. [2022-01-18 15:56:47,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11060 to 8764. [2022-01-18 15:56:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8764 states, 8763 states have (on average 4.461714024877325) internal successors, (39098), 8763 states have internal predecessors, (39098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8764 states to 8764 states and 39098 transitions. [2022-01-18 15:56:47,285 INFO L78 Accepts]: Start accepts. Automaton has 8764 states and 39098 transitions. Word has length 30 [2022-01-18 15:56:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:47,285 INFO L470 AbstractCegarLoop]: Abstraction has 8764 states and 39098 transitions. [2022-01-18 15:56:47,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 8764 states and 39098 transitions. [2022-01-18 15:56:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:47,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:47,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:47,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:47,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:47,515 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:47,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:47,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1963471442, now seen corresponding path program 43 times [2022-01-18 15:56:47,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:47,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855181779] [2022-01-18 15:56:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:47,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:47,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:47,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855181779] [2022-01-18 15:56:47,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855181779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:47,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886451847] [2022-01-18 15:56:47,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:56:47,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:47,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:47,686 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:47,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-01-18 15:56:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:47,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:56:47,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:47,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:47,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:47,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:47,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:56:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:47,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:56:48,167 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-01-18 15:56:48,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 46 [2022-01-18 15:56:48,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:48,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:48,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:48,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:48,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 3 [2022-01-18 15:56:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:48,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886451847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:56:48,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:56:48,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-01-18 15:56:48,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645239306] [2022-01-18 15:56:48,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:56:48,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:56:48,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:56:48,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:56:48,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:56:48,240 INFO L87 Difference]: Start difference. First operand 8764 states and 39098 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:49,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:56:49,208 INFO L93 Difference]: Finished difference Result 9587 states and 42365 transitions. [2022-01-18 15:56:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:56:49,208 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 15:56:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:56:49,231 INFO L225 Difference]: With dead ends: 9587 [2022-01-18 15:56:49,231 INFO L226 Difference]: Without dead ends: 9546 [2022-01-18 15:56:49,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=1270, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:56:49,231 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 232 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:56:49,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 163 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1474 Invalid, 0 Unknown, 380 Unchecked, 0.6s Time] [2022-01-18 15:56:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2022-01-18 15:56:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8819. [2022-01-18 15:56:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 4.463597187570878) internal successors, (39360), 8818 states have internal predecessors, (39360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 39360 transitions. [2022-01-18 15:56:49,383 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 39360 transitions. Word has length 30 [2022-01-18 15:56:49,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:56:49,383 INFO L470 AbstractCegarLoop]: Abstraction has 8819 states and 39360 transitions. [2022-01-18 15:56:49,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:56:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 39360 transitions. [2022-01-18 15:56:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 15:56:49,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:56:49,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:49,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:49,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:49,614 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err8INUSE_VIOLATION, thread1Err9INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION (and 7 more)] === [2022-01-18 15:56:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:56:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1319590963, now seen corresponding path program 5 times [2022-01-18 15:56:49,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:56:49,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689159093] [2022-01-18 15:56:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:56:49,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:56:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:56:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:49,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:56:49,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689159093] [2022-01-18 15:56:49,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689159093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:56:49,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140530799] [2022-01-18 15:56:49,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:56:49,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:56:49,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:56:49,817 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:56:49,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-01-18 15:56:49,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:56:49,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:56:49,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:56:49,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:56:50,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:56:50,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:50,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:56:50,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 15:56:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:56:50,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-01-18 15:56:50,435 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2022-01-18 15:56:50,449 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 [2022-01-18 15:56:50,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Forceful destruction successful, exit code 0 [2022-01-18 15:56:50,468 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:56:50,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-01-18 15:56:50,636 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. [2022-01-18 15:56:50,637 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err8INUSE_VIOLATION (9 of 11 remaining) [2022-01-18 15:56:50,637 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err9INUSE_VIOLATION (8 of 11 remaining) [2022-01-18 15:56:50,637 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (7 of 11 remaining) [2022-01-18 15:56:50,637 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (6 of 11 remaining) [2022-01-18 15:56:50,637 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0INUSE_VIOLATION (5 of 11 remaining) [2022-01-18 15:56:50,638 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err3INUSE_VIOLATION (4 of 11 remaining) [2022-01-18 15:56:50,638 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err6INUSE_VIOLATION (3 of 11 remaining) [2022-01-18 15:56:50,638 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork0Err7INUSE_VIOLATION (2 of 11 remaining) [2022-01-18 15:56:50,638 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork1Err4INUSE_VIOLATION (1 of 11 remaining) [2022-01-18 15:56:50,638 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork1Err5INUSE_VIOLATION (0 of 11 remaining) [2022-01-18 15:56:50,640 INFO L732 BasicCegarLoop]: Path program histogram: [85, 50, 43, 32, 29, 20, 13, 11, 9, 8, 8, 7, 6, 6, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:56:50,642 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 15:56:50,642 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 15:56:50,643 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 03:56:50 BasicIcfg [2022-01-18 15:56:50,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 15:56:50,643 INFO L158 Benchmark]: Toolchain (without parser) took 932563.79ms. Allocated memory was 436.2MB in the beginning and 1.4GB in the end (delta: 994.1MB). Free memory was 395.7MB in the beginning and 939.4MB in the end (delta: -543.7MB). Peak memory consumption was 454.9MB. Max. memory is 16.0GB. [2022-01-18 15:56:50,643 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 436.2MB. Free memory is still 396.9MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:56:50,643 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.88ms. Allocated memory is still 436.2MB. Free memory was 395.7MB in the beginning and 394.1MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 15:56:50,643 INFO L158 Benchmark]: Boogie Preprocessor took 10.49ms. Allocated memory is still 436.2MB. Free memory was 394.1MB in the beginning and 393.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:56:50,643 INFO L158 Benchmark]: RCFGBuilder took 261.74ms. Allocated memory is still 436.2MB. Free memory was 393.0MB in the beginning and 382.2MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-18 15:56:50,644 INFO L158 Benchmark]: TraceAbstraction took 932271.85ms. Allocated memory was 436.2MB in the beginning and 1.4GB in the end (delta: 994.1MB). Free memory was 381.6MB in the beginning and 939.4MB in the end (delta: -557.8MB). Peak memory consumption was 438.1MB. Max. memory is 16.0GB. [2022-01-18 15:56:50,644 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 0.10ms. Allocated memory is still 436.2MB. Free memory is still 396.9MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 16.88ms. Allocated memory is still 436.2MB. Free memory was 395.7MB in the beginning and 394.1MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 10.49ms. Allocated memory is still 436.2MB. Free memory was 394.1MB in the beginning and 393.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 261.74ms. Allocated memory is still 436.2MB. Free memory was 393.0MB in the beginning and 382.2MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 932271.85ms. Allocated memory was 436.2MB in the beginning and 1.4GB in the end (delta: 994.1MB). Free memory was 381.6MB in the beginning and 939.4MB in the end (delta: -557.8MB). Peak memory consumption was 438.1MB. Max. memory is 16.0GB. * 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: 110]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 932.1s, OverallIterations: 365, TraceHistogramMax: 2, PathProgramHistogramMax: 85, EmptinessCheckTime: 2.9s, AutomataDifference: 536.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 110222 SdHoareTripleChecker+Valid, 242.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 110222 mSDsluCounter, 63712 SdHoareTripleChecker+Invalid, 204.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 222386 IncrementalHoareTripleChecker+Unchecked, 424529 mSDsCounter, 32912 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 622822 IncrementalHoareTripleChecker+Invalid, 878120 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32912 mSolverCounterUnsat, 6258 mSDtfsCounter, 622822 mSolverCounterSat, 1.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 31817 GetRequests, 14854 SyntacticMatches, 1852 SemanticMatches, 15111 ConstructedPredicates, 0 IntricatePredicates, 18 DeprecatedPredicates, 239673 ImplicationChecksByTransitivity, 386.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8877occurred in iteration=361, InterpolantAutomatonStates: 12193, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 31.8s AutomataMinimizationTime, 364 MinimizatonAttempts, 446969 StatesRemovedByMinimization, 361 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 270.2s InterpolantComputationTime, 20296 NumberOfCodeBlocks, 20296 NumberOfCodeBlocksAsserted, 1058 NumberOfCheckSat, 29254 ConstructedInterpolants, 2388 QuantifiedInterpolants, 419569 SizeOfPredicates, 3188 NumberOfNonLiveVariables, 43955 ConjunctsInSsa, 9199 ConjunctsInUnsatCore, 1072 InterpolantComputations, 10 PerfectInterpolantSequences, 240/4469 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